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EN010103-001057-NZT DCO 6.4.1 ES Vol III Appendix 1A EIA Scoping Report Part 1.pdf:48: contamination hotspots or plumes, quantitative risk assessment, remediation and
EN010103-001057-NZT DCO 6.4.1 ES Vol III Appendix 1A EIA Scoping Report Part 1.pdf:70: visible emissions, for example smoke or visible plumes.
EN010103-002421-NZT DCO 9.42 - Comments on D9 Submissions & Additional Submissions - Oct 2022 (D11).pdf:42: scenario, less than 10% of the plume could potentially be located in a limited area
EN010103-002421-NZT DCO 9.42 - Comments on D9 Submissions & Additional Submissions - Oct 2022 (D11).pdf:42: located away from the CO2 plume would not need to be considered. As a
EN010103-002421-NZT DCO 9.42 - Comments on D9 Submissions & Additional Submissions - Oct 2022 (D11).pdf:42: those reasons, even allowing for the potential for some small part of the plume
EN010103-002552-NZT DCO 5.13 - HRA Report (Clean) - Nov 2022 (D12) (1).pdf:50: always met within a few metres of the outfall and before the plume meets the water
EN010103-002552-NZT DCO 5.13 - HRA Report (Clean) - Nov 2022 (D12) (1).pdf:52: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002552-NZT DCO 5.13 - HRA Report (Clean) - Nov 2022 (D12) (1).pdf:52: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002552-NZT DCO 5.13 - HRA Report (Clean) - Nov 2022 (D12) (1).pdf:52: low and the thermal plume associated with release of water will be very localised.
EN010103-002552-NZT DCO 5.13 - HRA Report (Clean) - Nov 2022 (D12) (1).pdf:97: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002552-NZT DCO 5.13 - HRA Report (Clean) - Nov 2022 (D12) (1).pdf:97: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002552-NZT DCO 5.13 - HRA Report (Clean) - Nov 2022 (D12) (1).pdf:98: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-002258-NZT DCO - 5.13 - HRA (Tracked) - Sept 2022(D8).pdf:54: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002258-NZT DCO - 5.13 - HRA (Tracked) - Sept 2022(D8).pdf:54: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002258-NZT DCO - 5.13 - HRA (Tracked) - Sept 2022(D8).pdf:54: low and the thermal plume associated with release of water will be very localised.
EN010103-002258-NZT DCO - 5.13 - HRA (Tracked) - Sept 2022(D8).pdf:97: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002258-NZT DCO - 5.13 - HRA (Tracked) - Sept 2022(D8).pdf:97: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002258-NZT DCO - 5.13 - HRA (Tracked) - Sept 2022(D8).pdf:98: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-002323-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Tracked Oct 2022 (D9).pdf:23:system scenarios (i.e. alternative outfall) the effluent plume may neutral emission). The effluent
EN010103-002323-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Tracked Oct 2022 (D9).pdf:27:system scenarios (i.e. alternative outfall) the effluent plume may be discharged (i.e. this is a
EN010103-001667-Natural England - Written Representations (WRs), including summaries of all WRs exceeding 1500 words.pdf:38:plumes from 24 septic systems.
EN010103-001667-Natural England - Written Representations (WRs), including summaries of all WRs exceeding 1500 words.pdf:39:distance any P plume extends. Calcareous sediments having very high P retention (average
EN010103-001667-Natural England - Written Representations (WRs), including summaries of all WRs exceeding 1500 words.pdf:39:97%), with plumes not extending beyond 10m and non-calcareous sediments showing
EN010103-001667-Natural England - Written Representations (WRs), including summaries of all WRs exceeding 1500 words.pdf:39:greater variability and having a lower P retention (average 69%) with some of the P plumes
EN010103-001667-Natural England - Written Representations (WRs), including summaries of all WRs exceeding 1500 words.pdf:40:NECR222). Robertson et al (2019) also found that the majority (although not all) of plumes did not extend further
EN010103-001667-Natural England - Written Representations (WRs), including summaries of all WRs exceeding 1500 words.pdf:40:Robertson et al (2019) found a plume to extend which was 100m to ensure there would be no overlap. It also
EN010103-001582-NZT DCO 5.3 - Planning Statement - May 2022 (Tracked).pdf:234: structure (including any associated emission plume) after mitigation.
EN010103-002069-NZT DCO 8.5 - Environment Agency SoCG (Tracked) August 2-22 (D6).pdf:11: plume impacts, emissions to air and the emerging BAT
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:23:with the water effluent plume from effluent containing noted that there is no WFD classification available for nitrogen
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:24:sediment plumes need to be taken into account in the Screening stage (see paragraph 9.5.6 and Table 9C-10). At
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:24: sediment plumes, and this is considered in Table 9C-15 (Tees
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:24: Potential impacts from a thermal/sediment plume scoped into
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:24: plumes have taken consideration of the spatial area of impact
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:55: the potential for an effluent plume from the proposed discharge of cooling
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:59: physical disturbance and changes in water quality (e.g. a sediment plume
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:59: outfall causing thermal plumes or chemical changes in water quality including
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:59: effluent plumes:
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:60: assessment on account of the potential sediment, chemical or thermal plume
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:60: chemical effluent plume may be larger and
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:60: sediment plume risks has been undertaken,
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:60: sediment plume during construction could
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:60: exceed 0.5 km2. Modelling of thermal plumes
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:60: phase and indicates potential for a plume to
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:60: chemical effluent plume may be larger and
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:60: within the ZoI of the DIN effluent plume from
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:61: operational impacts such as the release of a thermal plume from process
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:61:change in depth or discharge plume or pollutants in
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:64:Biology: Habitats Habitats and benthic Potential temporary sediment plume during
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:64: invertebrates construction or thermal/chemical plume during
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:64: of nitrogen from the proposed new outfall may create a plume that would
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:66: plume that would slightly enter the
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:66: plume (for DIN) to enter the mouth of the estuary, at depth within the dredged
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:67: noting that this also includes the footprint of thermal or sediment plumes:
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:67: sediment plume being produced by the installation and removal of the coffer
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:68:0.5 km2 or ✓ ✓ Any plume relating to runoff laden with fine
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:68:1% or more of ✓ ✓ Any plume relating to runoff laden with fine
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:68: DIN effluent plume from the new outfall location.
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:68: these habitat areas. plume relating to runoff
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:70: conditions, and at depth (i.e. not at the surface; plume
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:82: sediment plume.
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:82:9.7.51 However, it is considered that any sediment plume arising from this
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:82: and mammals are able to avoid the plume. Furthermore, the relatively
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:83: scale and any sediment plume would be very quickly dispersed by the
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:98:9.7.135 Mixing zone plumes in CORMIX are modelled over different stages; the
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:98: rising stage) and the later period of mixing when the plume reaches the water
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:98: by diffusion of the plume into the large ambient water volume. Further details
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:99: Results of near-field thermal plume modelling undertaken using the CORMIX
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:99: extent of a thermal plume (with a 15°C excess temperature at source) would
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:99: temperature excess, the ebb extent of the plume increases to 140m.
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:99: plume dispersion appear to occur very rapidly from the origin with very little
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:99: rates of dissipation of the outfall plume, the neap tidal phases offer a larger
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:99: plume, with the 2°C contour extending 600 m and 400 m from the outfall on
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:99: extent of the thermal plume and the apparent degree of mixing, it is unlikely
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:100: habitats and associated communities within the footprint of the thermal plume
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:100: between the small thermal plume and intertidal habitats and so the magnitude
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:100: thermal plume has been shown to be very localised, and The extent of the
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:100: thermal plume within the water column will be highly localised, with a small
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:100: water) and therefore the footprint of the thermal plume on the seabed will
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:100: such as sandeels) to the thermal plume is unlikely to result in changes to
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:100: communities in terms of abundance and diversity. The thermal plume is
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:101: establishment of non-natives linked to the thermal plume is therefore
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:104: plume rising stage for low tide, high tide and maximum current conditions.
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:120: levels within the Tees Bay. A smaller area within the wider plume will exceed
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:177:concentrations are diluted to below the EQS. Mixing zone plumes in CORMIX are modelled over
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:177:period of mixing when the plume reaches the water surface and spreads laterally (the surface spreading
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:177:while dilution during the surface spreading stage is more dominated by diffusion of the plume into the
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:177:zone plumes in different ways depending on the current conditions specified:
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:177: pair of ports and resolve the dimensions of the resulting three individual plumes (Figure 4-2).
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:178: resolve individual mixing plumes for each pair of outfalls, although the plumes are significantly
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:178: of each plume and for the surface spreading stage. The plumes combine and become vertically
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:178: 0.271 m/s respectively) the plumes undergo rapid lateral mixing at the point of discharge.
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:178: CORMIX represents this by combining the plumes into a single mixing zone for both the vertical
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:178:mixing plume above the outfall, the lateral distance travelled by the plume and the cross section width
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:178:of the mixing zone plume at the point when the EQS is reached. If the EQS is met in the surface
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:179:plume rising stage.
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:179: Plume Cross Section Width 1.9 0.5 1.0 0.6 0.9
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:179: Plume Cross Section Width 15
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:179: Plume Cross Section Width 15 immediately on discharge
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:179: Plume Cross Section Width 1.8 0.4 0.5 0.3 0.5
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:179: Plume Cross Section Width 1.9 0.5 1.0 0.4 0.3
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:179: Plume Cross Section Width 15 immediately on discharge
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:179: Plume Cross Section Width 15 immediately on discharge
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:179: Plume Cross Section Width 1.8 0.4 0.8 0.3 0.3
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:179:The results in Table 4-3 show that EQS values for all substances are met within the plume rising stage
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:180:scenario is 0.34 m/s and the EQS for all substances are met during the plume rising stage. Results are
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:181: Plume Cross Section Width 0.6 discharge 0.7 0.6
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:181: Plume Cross Section Width
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:181: Plume Cross Section Width
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:181: Plume Cross Section Width 0.6 discharge 0.7 0.6
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:181: Plume Cross Section Width 0.6 discharge 0.7
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:181: Plume Cross Section Width
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:181: Plume Cross Section Width
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:181: Plume Cross Section Width 0.6 discharge 0.7
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:190:plume reaches the water surface. Thermal effects are also extremely small, with the temperature of the
EN010103-002424-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Tracked).pdf:190:mixing plume falling below 3°C above ambient conditions within a very short distance. Surface
EN010103-001246-EA_NZT_OFFICIAL_171221_Redacted.pdf:2:with the water effluent plume from effluent containing Nitrogen to the Tees bay
EN010103-001246-EA_NZT_OFFICIAL_171221_Redacted.pdf:20:plume may prohibit upstream movement. Therefore, there is a potential for
EN010103-001586-NZT DCO 8.4 - MMO SoCG - May 2022.pdf:25: preliminary prediction that any “plume” would quickly dissipate and is likely to be ecological
EN010103-001652-Climate Emergency Policy and Planning - Written Representations.pdf:137:available to assess with more precision the behaviour of the CO2 plume in the storage
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:21:system scenarios (i.e. alternative outfall) the effluent plume may neutral emission). The effluent
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:33:Figure 4-2: Deflected Lateral Plume Mixing Zone…………………………………………………………………….. 22
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:50:that the mixing zone plume can take two different shapes depending on the current flow rate compared
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:50:to the discharge velocity; the plume either forms a vertical mixing zone extending towards the water
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:50:surface or a lateral plume extending along the direction of the current. The two plume shapes are shown
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:50:the vertical thickness of the plume. These dimensions will be quoted in Section 5 to show the size of
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:50:If a vertically rising plume reaches the water surface, then the effluent will spread horizontally at the
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:50:plume begins to spread at the surface level. The lateral extent of the surface mixing zone can become
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:50:large under this scenario, although the vertical rising plume thickness remains small. The extent of any
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:51: Figure 4-2: Deflected Lateral Plume Mixing Zone
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:52: Description of Plume Distance from outfall to reaching EQS
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:52: Plume is deflected horizontally a = 1.8 m a = 0.9 m a = 1.3 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:52: Min Plume rises vertically but does a = 0.12 m a = 0.03 m a = 0.05 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:52: Plume is deflected horizontally a = 1.2 m a = 0.9 m a = 1.2 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:52: Min Plume rises vertically but does a = 0.05 m a = 0.03 m a = 0.05 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:52: High Tide Plume rises vertically and only b = 2.6 m b = 1.6 m b = 1.9 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:52: Plume rises vertically but does b = 2.0 m b = 0.3 m b = 2.3 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:53: High Tide Plume rises vertically and b = 3.9 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:53: High Tide Plume rises vertically and b = 2.0 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:53:always met within a few metres of the outfall and before the plume meets the water surface. A thermal
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:53: Description of Plume Distance from outfall to reaching EQS
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:53: Plume is deflected horizontally
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:54: Plume is deflected horizontally a = 1.2 m a = 0.8 m a = 1.2 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:54: Min Plume rises vertically but does a = 0.05 m a = 0.03 m a = 0.05 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:54: High Tide Plume rises vertically and only b = 2.6 m b = 1.6 m b = 1.9 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:54: Plume rises vertically but does b = 1.7 m b = 1.6 m b = 1.9 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:54: High Tide Plume rises vertically and b = 3.1 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:54: Plume rises vertically but does b = 1.9 m
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:54:always met within a few meters of the outfall and before the plume meets the water surface. A thermal
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:64:the EQS within a very short distance of the outfall and before the mixing plume reaches the water
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:64:surface. Thermal effects are also extremely small, with the temperature of the mixing plume falling
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:64:below 3°C above ambient condition within a very short distance and usually before the plume reaches
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:74:Results of near-field thermal plume modelling undertaken using the CORMIX modelling software show
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:74:that, for Outfall 1 under spring conditions, the likely extent of a thermal plume (with a 15°C excess
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:74:extent of the plume increases to 140 m. Considering a further reduced excess temperature shows that
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:74:and 720 m on an ebb. In all cases tested, the mixing and plume dispersion appear to occur very rapidly
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:74:outfall plume, the neap tidal phases offer a larger plume, with the 2°C contour extending 600 m and
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:74:Far field plume dispersion modelling using the Delft3D model shows a small impact of outfall discharge
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:75: 1.1 Near-field thermal plume modelling ……………………………………………………………………………………..2
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:75: 1.2 Far-field thermal plume modelling …………………………………………………………………………………………2
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:76:Table 10. Thermal plume properties in Delft3D, summer and winter case …………………………………… 17
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:76:Figure 14. Spring and neap flood tide plume variations during normal discharge events. ………… 13
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:76:Figure 15. Spring and neap ebb tide plume variations during normal discharge events. …………… 14
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:79:Figure 82. Spring and neap flood tide plume variations during extreme discharge events. ………. 91
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:79:Figure 83. Spring and neap ebb tide plume variations during normal discharge events. …………… 92
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:80:AECOM Ltd. have commissioned ABPmer to undertake hydrodynamic and thermal plume modelling of
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:82: Near-field thermal plume modelling at two different outfall locations; and
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:82: Far-field 3D thermal plume modelling.
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:82:1.1 Near-field thermal plume modelling
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:82:model to construct thermal plume simulations using the MixZon Inc. CORMIX modelling software.
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:82:quantify the possible extent of a plume from both outfall locations with particular thermal properties.
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:82:1.2 Far-field thermal plume modelling
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:82:Section 2: CORMIX Modelling – Outfall 1: Provides details of the thermal plume model setup and
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:82:Section 3: CORMIX Modelling – Outfall 2: Provides details of the updated thermal plume
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:84:CORMIX thermal plume modelling, as described in the following sections.
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:87:flood and ebb conditions as in Table 1) and shows the ebb plume (Run 10) to better maintain its excess
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:87:Shown in Figure 7 is the plume sensitivity to winds. The summer wind value of 4.08 m/s is a light wind
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:87:and doesn’t appear to have any influence on the plume when comparing runs 01 and 03. When a
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:87:significantly stronger wind of 15 m/s is applied (Run 16), the plume is slightly affected causing the excess
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:88:Figure 8 shows the tests addressing the plume sensitivity to the discharge port diameter. The baseline
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:88:Figure 9 shows the plume sensitivity to projection of the outfall port. Run 01 has a vertical projection
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:91:As stated in Section 2, CORMIX modelling, assessing the near-field impact of the of thermal plume has
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:103:In order to test the sensitivity of the plume discharge to wind directions, two further simulations have
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:103: differences in the distribution of the thermal plume:
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:103: When a south easterly (120°) wind is applied to the summer thermal plume discharge scenario
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:103: the effect is to reduce the eastern extent of the thermal plume. This is more pronounced in the
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:103: neap comparisons where flow speeds are lower and the along-coast extent of the plume is
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:108:the Outfall 1 site are consistently higher which may be contributing to faster dispersion of the plume as
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:108:This plot shows the along shore flow directing the plume discharge into the estuary. Plot Figure 29
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:Near-field thermal plume modelling has been undertaken using the CORMIX modelling software to
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:conditions, the likely extent of a thermal plume (of the properties modelled) would be very localised: a
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:m on the ebb. Considering a 2°C temperature excess the ebb extent of the plume increases to 140 m,
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:To examine the wider plume dispersion a 0.1°C temperature excess contour was exported from CORMIX.
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:allow the plume to stay buoyant for longer, however the excursion from the plume would be limited by
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:Sensitivity testing showed only a small influence on plume extent due to wind and seasonal variations,
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:the plume.
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:outfall plume, the neap tidal phases offer a larger plume, when compared to the spring tide, under
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:normal discharge conditions. In particular, the neap flood tide offers the largest plume extent as
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:However, it is to be noted that the CORMIX model assumes full plume development under the given
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:enough for a fully developed plume (as defined) to form. As the flows reduce, either side of the peak
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:conditions modelled, and turn with the tidal phase, further dissipation of the plume is expected before
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:Far field plume dispersion modelling has been undertaken using the Delft3D modelling software using
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:116:Temperature excess plots of the plume impact have shown a small impact of the outfall discharge on
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:123:thermal plume or contamination modelling.
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:171:Figure 82 shows the downstream temperature excess of the resultant plume during a spring (run 26)
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:171:characteristics again result in a more extensive plume, reducing the excess temperature at a slower rate
EN010103-002248-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper - Sept 2022(D8).pdf:171:Figure 82. Spring and neap flood tide plume variations during extreme discharge events.
EN010103-001587-NZT DCO 8.5 - Environment Agency SoCG - May 2022.pdf:11: themes of power generation, cooling, visible plume
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:52: disturbance and changes in water quality (e.g. a sediment plume relating to
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:52: causing thermal plumes or chemical changes in water quality and deposition
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:52: noting that this also includes the footprint of thermal or sediment plumes:
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:53: on account of the potential sediment or thermal plume to be produced by the
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:53:larger sediment plume risks has been undertaken,
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:53: plume during construction could exceed 0.5 km2.
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:53: Modelling of thermal plumes has been
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:53: indicates potential for a plume to exceed 0.5 km2.
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:53: operational impacts such as the release of a thermal plume from process
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:54:change in depth or flow) release of a thermal discharge plume or
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:55:Biology: Habitats Habitats and benthic Potential temporary sediment plume during
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:55: invertebrates construction or thermal plume during operation.
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:58: noting that this also includes the footprint of thermal or sediment plumes:
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:58: sediment plume being produced by the installation and removal of the coffer
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:59:0.5 km2 or larger ✓ Any plume relating to runoff laden with fine
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:59:1% or more of the ✓ Any plume relating to runoff laden with fine
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:59:1% or more of any ✓ Any plume relating to runoff laden with fine
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:71: cause an oxygen demand within the sediment plume.
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:71:9.7.39 However, it is considered that any sediment plume arising from this
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:71: and mammals are able to avoid the plume. Furthermore, the relatively
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:71: scale and any sediment plume would be very quickly dispersed by the
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:86:9.7.120 Results of near-field thermal plume modelling undertaken using the CORMIX
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:86: extent of a thermal plume (with a 15°C excess temperature at source) would
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:86: temperature excess, the ebb extent of the plume increases to 140m.
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:86: plume dispersion appear to occur very rapidly from the origin with very little
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:86: rates of dissipation of the outfall plume, the neap tidal phases offer a larger
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:86: plume, with the 2°C contour extending 600 m and 400 m from the outfall on
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:86: plume and the apparent degree of mixing, it is unlikely that the planktonic
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:86: habitats and associated communities within the footprint of the thermal plume
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:86: between the thermal plume and intertidal habitats and so the magnitude of
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:87: the thermal plume within the water column will be highly localised, with a
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:87: density of warmer water) and therefore the footprint of the thermal plume on
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:87: such as sandeels) to the thermal plume is unlikely to result in changes to
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:87: communities in terms of abundance and diversity. The thermal plume is also
EN010103-001064-NZT DCO 6.4.11 ES Vol III Appendix 9C WFD Assessment.pdf:87: establishment of non-natives linked to the thermal plume is therefore
EN010103-001152-NZT DCO 5.1 - Consultation Report.pdf:166: and sediments and the historical industrial input 26.08.20 - review of responses to Stage 2 thermal and chemical plume Report; and
EN010103-001152-NZT DCO 5.1 - Consultation Report.pdf:167: predict plume behaviour from the outfall.
EN010103-001152-NZT DCO 5.1 - Consultation Report.pdf:681: and visible vapour plumes;
EN010103-001152-NZT DCO 5.1 - Consultation Report.pdf:685:5.2 We also note the statement that the stacks will not give rise to any visible plumes (due to water
EN010103-001152-NZT DCO 5.1 - Consultation Report.pdf:685: towers could result in occasional visible plumes during certain weather conditions. It is
EN010103-001152-NZT DCO 5.1 - Consultation Report.pdf:685: explained that, to address this, an assessment of visible plume formation will be undertaken to
EN010103-002238-NZT DCO 8.5 - SoCG - Environment Agency September (Tracked) 2022 (D8).pdf:11: plume impacts, emissions to air and the emerging BAT
EN010103-000891-NZT DCO 6.2.5 ES Vol I Chapter 5 Construction Programme and Management.pdf:13: dissipation of any plume, a diffuser at the outfall head will be retrofitted if the
EN010103-001683-Marine Management Organisation - Responses to the ExA’s ExQ1.pdf:20: ii) What consequences would this have for the visibility of the plume?
EN010103-002312-NZT DCO 6.4.49 - ES Vol III Appendix 25A Commitments Register Tracked Oct 2022 (D9).pdf:12: volumes and to assist the dissipation of any plume a
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:23:system scenarios (i.e. alternative outfall) the effluent plume may neutral emission). The effluent
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:27:system scenarios (i.e. alternative outfall) the effluent plume may be discharged (i.e. this is a
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:44:Figure 4-2: Deflected Lateral Plume Mixing Zone…………………………………………………………………….. 22
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:61:that the mixing zone plume can take two different shapes depending on the current flow rate compared
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:61:to the discharge velocity; the plume either forms a vertical mixing zone extending towards the water
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:61:surface or a lateral plume extending along the direction of the current. The two plume shapes are shown
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:61:the vertical thickness of the plume. These dimensions will be quoted in Section 5 to show the size of
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:61:If a vertically rising plume reaches the water surface, then the effluent will spread horizontally at the
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:61:plume begins to spread at the surface level. The lateral extent of the surface mixing zone can become
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:61:large under this scenario, although the vertical rising plume thickness remains small. The extent of any
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:62: Figure 4-2: Deflected Lateral Plume Mixing Zone
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:63: Description of Plume Distance from outfall to reaching EQS
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:63: Plume is deflected horizontally a = 1.8 m a = 0.9 m a = 1.3 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:63: Min Plume rises vertically but does a = 0.12 m a = 0.03 m a = 0.05 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:63: Plume is deflected horizontally a = 1.2 m a = 0.9 m a = 1.2 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:63: Min Plume rises vertically but does a = 0.05 m a = 0.03 m a = 0.05 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:63: High Tide Plume rises vertically and only b = 2.6 m b = 1.6 m b = 1.9 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:63: Plume rises vertically but does b = 2.0 m b = 0.3 m b = 2.3 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:64: High Tide Plume rises vertically and b = 3.9 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:64: High Tide Plume rises vertically and b = 2.0 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:64:always met within a few metres of the outfall and before the plume meets the water surface. A thermal
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:64: Description of Plume Distance from outfall to reaching EQS
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:64: Plume is deflected horizontally
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:65: Plume is deflected horizontally a = 1.2 m a = 0.8 m a = 1.2 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:65: Min Plume rises vertically but does a = 0.05 m a = 0.03 m a = 0.05 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:65: High Tide Plume rises vertically and only b = 2.6 m b = 1.6 m b = 1.9 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:65: Plume rises vertically but does b = 1.7 m b = 1.6 m b = 1.9 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:65: High Tide Plume rises vertically and b = 3.1 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:65: Plume rises vertically but does b = 1.9 m
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:65:always met within a few meters of the outfall and before the plume meets the water surface. A thermal
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:75:the EQS within a very short distance of the outfall and before the mixing plume reaches the water
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:75:surface. Thermal effects are also extremely small, with the temperature of the mixing plume falling
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:75:below 3°C above ambient condition within a very short distance and usually before the plume reaches
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:85:Results of near-field thermal plume modelling undertaken using the CORMIX modelling software show
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:85:that, for Outfall 1 under spring conditions, the likely extent of a thermal plume (with a 15°C excess
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:85:extent of the plume increases to 140 m. Considering a further reduced excess temperature shows that
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:85:and 720 m on an ebb. In all cases tested, the mixing and plume dispersion appear to occur very rapidly
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:85:outfall plume, the neap tidal phases offer a larger plume, with the 2°C contour extending 600 m and
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:85:Far field plume dispersion modelling using the Delft3D model shows a small impact of outfall discharge
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:86: 1.1 Near-field thermal plume modelling ……………………………………………………………………………………..2
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:86: 1.2 Far-field thermal plume modelling …………………………………………………………………………………………2
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:87:Table 10. Thermal plume properties in Delft3D, summer and winter case …………………………………… 17
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:87:Figure 14. Spring and neap flood tide plume variations during normal discharge events. ………… 13
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:87:Figure 15. Spring and neap ebb tide plume variations during normal discharge events. …………… 14
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:90:Figure 82. Spring and neap flood tide plume variations during extreme discharge events. ………. 91
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:90:Figure 83. Spring and neap ebb tide plume variations during normal discharge events. …………… 92
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:91:AECOM Ltd. have commissioned ABPmer to undertake hydrodynamic and thermal plume modelling of
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:93: Near-field thermal plume modelling at two different outfall locations; and
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:93: Far-field 3D thermal plume modelling.
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:93:1.1 Near-field thermal plume modelling
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:93:model to construct thermal plume simulations using the MixZon Inc. CORMIX modelling software.
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:93:quantify the possible extent of a plume from both outfall locations with particular thermal properties.
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:93:1.2 Far-field thermal plume modelling
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:93:Section 2: CORMIX Modelling – Outfall 1: Provides details of the thermal plume model setup and
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:93:Section 3: CORMIX Modelling – Outfall 2: Provides details of the updated thermal plume
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:95:CORMIX thermal plume modelling, as described in the following sections.
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:98:flood and ebb conditions as in Table 1) and shows the ebb plume (Run 10) to better maintain its excess
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:98:Shown in Figure 7 is the plume sensitivity to winds. The summer wind value of 4.08 m/s is a light wind
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:98:and doesn’t appear to have any influence on the plume when comparing runs 01 and 03. When a
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:98:significantly stronger wind of 15 m/s is applied (Run 16), the plume is slightly affected causing the excess
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:99:Figure 8 shows the tests addressing the plume sensitivity to the discharge port diameter. The baseline
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:99:Figure 9 shows the plume sensitivity to projection of the outfall port. Run 01 has a vertical projection
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:102:As stated in Section 2, CORMIX modelling, assessing the near-field impact of the of thermal plume has
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:114:In order to test the sensitivity of the plume discharge to wind directions, two further simulations have
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:114: differences in the distribution of the thermal plume:
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:114: When a south easterly (120°) wind is applied to the summer thermal plume discharge scenario
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:114: the effect is to reduce the eastern extent of the thermal plume. This is more pronounced in the
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:114: neap comparisons where flow speeds are lower and the along-coast extent of the plume is
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:119:the Outfall 1 site are consistently higher which may be contributing to faster dispersion of the plume as
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:119:This plot shows the along shore flow directing the plume discharge into the estuary. Plot Figure 29
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:Near-field thermal plume modelling has been undertaken using the CORMIX modelling software to
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:conditions, the likely extent of a thermal plume (of the properties modelled) would be very localised: a
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:m on the ebb. Considering a 2°C temperature excess the ebb extent of the plume increases to 140 m,
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:To examine the wider plume dispersion a 0.1°C temperature excess contour was exported from CORMIX.
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:allow the plume to stay buoyant for longer, however the excursion from the plume would be limited by
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:Sensitivity testing showed only a small influence on plume extent due to wind and seasonal variations,
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:the plume.
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:outfall plume, the neap tidal phases offer a larger plume, when compared to the spring tide, under
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:normal discharge conditions. In particular, the neap flood tide offers the largest plume extent as
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:However, it is to be noted that the CORMIX model assumes full plume development under the given
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:enough for a fully developed plume (as defined) to form. As the flows reduce, either side of the peak
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:conditions modelled, and turn with the tidal phase, further dissipation of the plume is expected before
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:Far field plume dispersion modelling has been undertaken using the Delft3D modelling software using
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:127:Temperature excess plots of the plume impact have shown a small impact of the outfall discharge on
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:134:thermal plume or contamination modelling.
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:182:Figure 82 shows the downstream temperature excess of the resultant plume during a spring (run 26)
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:182:characteristics again result in a more extensive plume, reducing the excess temperature at a slower rate
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:182:Figure 82. Spring and neap flood tide plume variations during extreme discharge events.
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:214:concentrations are diluted to below the EQS. Mixing zone plumes in CORMIX are modelled over
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:214:period of mixing when the plume reaches the water surface and spreads laterally (the surface spreading
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:214:while dilution during the surface spreading stage is more dominated by diffusion of the plume into the
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:214:zone plumes in different ways depending on the current conditions specified:
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:214: pair of ports and resolve the dimensions of the resulting three individual plumes (Figure 4-2).
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:215: resolve individual mixing plumes for each pair of outfalls, although the plumes are significantly
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:215: of each plume and for the surface spreading stage. The plumes combine and become vertically
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:215: 0.271 m/s respectively) the plumes undergo rapid lateral mixing at the point of discharge.
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:215: CORMIX represents this by combining the plumes into a single mixing zone for both the vertical
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:215:mixing plume above the outfall, the lateral distance travelled by the plume and the cross section width
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:215:of the mixing zone plume at the point when the EQS is reached. If the EQS is met in the surface
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:216:plume rising stage.
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:216: Plume Cross Section Width 1.9 0.5 1.0 0.6 0.9
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:216: Plume Cross Section Width 15
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:216: Plume Cross Section Width 15 immediately on discharge
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:216: Plume Cross Section Width 1.8 0.4 0.5 0.3 0.5
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:216: Plume Cross Section Width 1.9 0.5 1.0 0.4 0.3
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:216: Plume Cross Section Width 15 immediately on discharge
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:216: Plume Cross Section Width 15 immediately on discharge
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:216: Plume Cross Section Width 1.8 0.4 0.8 0.3 0.3
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:216:The results in Table 4-3 show that EQS values for all substances are met within the plume rising stage
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:217:scenario is 0.34 m/s and the EQS for all substances are met during the plume rising stage. Results are
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:218: Plume Cross Section Width 0.6 discharge 0.7 0.6
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:218: Plume Cross Section Width
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:218: Plume Cross Section Width
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:218: Plume Cross Section Width 0.6 discharge 0.7 0.6
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:218: Plume Cross Section Width 0.6 discharge 0.7
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:218: Plume Cross Section Width
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:218: Plume Cross Section Width
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:218: Plume Cross Section Width 0.6 discharge 0.7
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:227:plume reaches the water surface. Thermal effects are also extremely small, with the temperature of the
EN010103-002321-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper (Tracked) Oct 2022 (D9).pdf:227:mixing plume falling below 3°C above ambient conditions within a very short distance. Surface
EN010103-002237-NZT DCO 8.5 - SoCG - Environment Agency September (Clean) 2022 (D8).pdf:11: plume impacts, emissions to air and the emerging BAT
EN010103-000901-NZT DCO 6.2.15 ES Vol I Chapter 15 Ornithology.pdf:68: sediment plumes creating conditions
EN010103-000901-NZT DCO 6.2.15 ES Vol I Chapter 15 Ornithology.pdf:70:waters (“thermal plume”) to the oxygen within the subtidal or marine fauna, hence no effect on Nature Conservation, Section 14.6
EN010103-000901-NZT DCO 6.2.15 ES Vol I Chapter 15 Ornithology.pdf:86: and diving birds resulting from increases in water turbidity (sediment plumes),
EN010103-000901-NZT DCO 6.2.15 ES Vol I Chapter 15 Ornithology.pdf:86: discharges of heated water (thermal plume) and contaminants arising from
EN010103-001197-NZT DCO 6.2.4 - ES Vol I Chapter 4 - Oct 2021.pdf:8: draught cooling towers. These can give rise to visible plumes of water vapour
EN010103-001197-NZT DCO 6.2.4 - ES Vol I Chapter 4 - Oct 2021.pdf:8: dependent on the ambient weather conditions. A short visible plume may be
EN010103-001197-NZT DCO 6.2.4 - ES Vol I Chapter 4 - Oct 2021.pdf:8: operational. However, the proportion of time that the visible plume is predicted
EN010103-001196-NZT DCO 5.13 - HRA Report - Oct 2021 Rev.2.0.pdf:51: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-001196-NZT DCO 5.13 - HRA Report - Oct 2021 Rev.2.0.pdf:51: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-001196-NZT DCO 5.13 - HRA Report - Oct 2021 Rev.2.0.pdf:51: low and the thermal plume associated with release of water will be very localised.
EN010103-001196-NZT DCO 5.13 - HRA Report - Oct 2021 Rev.2.0.pdf:89: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-001196-NZT DCO 5.13 - HRA Report - Oct 2021 Rev.2.0.pdf:89: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-001196-NZT DCO 5.13 - HRA Report - Oct 2021 Rev.2.0.pdf:90: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-001015-NZT DCO 6.4.2 ES Vol III Appendix 1B EIA Scoping Opinion Part 1.pdf:38: • thermal plume;
EN010103-001024-NZT DCO 6.4.9 ES Vol III Appendix 9A Flood Risk Assessment Part 1.pdf:80: there are any remotely sensed measurements of the plume temperature near the site from the
EN010103-002235-NZT DCO 8.4 - MMO SoCG (Clean) - Sept 2022(D8).pdf:24: preliminary prediction that any “plume” would quickly dissipate and is likely to be ecological
EN010103-002062-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Clean) August 2022 (D6).pdf:51: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002062-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Clean) August 2022 (D6).pdf:51: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002062-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Clean) August 2022 (D6).pdf:52: low and the thermal plume associated with release of water will be very localised.
EN010103-002062-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Clean) August 2022 (D6).pdf:93: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002062-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Clean) August 2022 (D6).pdf:93: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002062-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Clean) August 2022 (D6).pdf:94: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-000013-EN010103_Scoping Opinion.pdf:37: • thermal plume;
EN010103-002553-NZT DCO 5.13 - HRA Report (Tracked) - Nov 2022 (D12).pdf:50: always met within a few metres of the outfall and before the plume meets the water
EN010103-002553-NZT DCO 5.13 - HRA Report (Tracked) - Nov 2022 (D12).pdf:52: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002553-NZT DCO 5.13 - HRA Report (Tracked) - Nov 2022 (D12).pdf:52: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002553-NZT DCO 5.13 - HRA Report (Tracked) - Nov 2022 (D12).pdf:52: low and the thermal plume associated with release of water will be very localised.
EN010103-002553-NZT DCO 5.13 - HRA Report (Tracked) - Nov 2022 (D12).pdf:98: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002553-NZT DCO 5.13 - HRA Report (Tracked) - Nov 2022 (D12).pdf:98: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002553-NZT DCO 5.13 - HRA Report (Tracked) - Nov 2022 (D12).pdf:99: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-001992-NZT DCO 9.24 - Written Summary of ISH4 August 2022 (D5).pdf:22: the downwash effect from the absorber tower on the plume discharged from the stack and therefore reduced
EN010103-002176-NZT DCO 6.4.49 - ES Vol III Appendix 25A Commitments Register Sept 2022(D7) (Clean).pdf:13: volumes and to assist the dissipation of any plume a
EN010103-002331-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) Oct 2022 (D9).pdf:51: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002331-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) Oct 2022 (D9).pdf:51: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002331-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) Oct 2022 (D9).pdf:52: low and the thermal plume associated with release of water will be very localised.
EN010103-002331-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) Oct 2022 (D9).pdf:96: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002331-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) Oct 2022 (D9).pdf:96: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002331-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) Oct 2022 (D9).pdf:97: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-002410-NZT DCO - 9.46 Applicants’ Response to the ExA's Third Written Questions - Oct 2022 (D11).pdf:22: v) Has NE had sight of an updated modelling report that was due, but not Plume modelling of the outfall discharge has been undertaken and this
EN010103-002410-NZT DCO - 9.46 Applicants’ Response to the ExA's Third Written Questions - Oct 2022 (D11).pdf:26: How can this plume fail to reach the water surface? Typically, effluent plumes are trapped at
EN010103-002410-NZT DCO - 9.46 Applicants’ Response to the ExA's Third Written Questions - Oct 2022 (D11).pdf:26: not clear that this configuration will give sufficient accuracy to capture the effluent plume.
EN010103-002410-NZT DCO - 9.46 Applicants’ Response to the ExA's Third Written Questions - Oct 2022 (D11).pdf:26: Please comment on the effect this may have on the concentrations / extent of the plume, and
EN010103-001161-NZT DCO 6.1 ES Non-Technical Summary.pdf:33:7.2.14 An assessment of visible plume formation from the cooling plant has been
EN010103-001161-NZT DCO 6.1 ES Non-Technical Summary.pdf:33: undertaken which indicates that a short visible plume may be present for the
EN010103-001579-NZT DCO 9.6 - Applicants' Comments on RRs - May 2022.pdf:93: in combination with the water effluent plume from effluent Atmospheric deposition rates and water effluent plume
EN010103-001579-NZT DCO 9.6 - Applicants' Comments on RRs - May 2022.pdf:98: - As the extent of the thermal plume is predominantly away from the
EN010103-001579-NZT DCO 9.6 - Applicants' Comments on RRs - May 2022.pdf:99: form part of that solution. It is not apparent if and how the proposal also confirm the potential for the effluent plume to enter the Tees
EN010103-001579-NZT DCO 9.6 - Applicants' Comments on RRs - May 2022.pdf:107: 346] Atmospheric deposition rates and water effluent plume Issue:
EN010103-001579-NZT DCO 9.6 - Applicants' Comments on RRs - May 2022.pdf:107: combination with the water effluent plume from effluent containing
EN010103-001579-NZT DCO 9.6 - Applicants' Comments on RRs - May 2022.pdf:122: species, where the SSC plume may prohibit upstream movement.
EN010103-001579-NZT DCO 9.6 - Applicants' Comments on RRs - May 2022.pdf:124: sediment concentrations (SSC) and create a sediment plume within
EN010103-001579-NZT DCO 9.6 - Applicants' Comments on RRs - May 2022.pdf:142: algal mats that are reducing the available foraging area for qualifying plume to enter the Tees Estuary and adversely affect the qualifying
EN010103-002067-NZT DCO 8.4 - Marine Management Organisation SoCG (Tracked) August 2022 (D6).pdf:25: preliminary prediction that any “plume” would quickly dissipate and is likely to be ecological
EN010103-000005-EN010103_Scoping Report.pdf:47: contamination hotspots or plumes, quantitative risk assessment, remediation and
EN010103-000005-EN010103_Scoping Report.pdf:69: visible emissions, for example smoke or visible plumes.
EN010103-002063-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Tracked) August 2022 (D6).pdf:54: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002063-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Tracked) August 2022 (D6).pdf:54: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002063-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Tracked) August 2022 (D6).pdf:54: low and the thermal plume associated with release of water will be very localised.
EN010103-002063-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Tracked) August 2022 (D6).pdf:97: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002063-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Tracked) August 2022 (D6).pdf:97: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002063-NZT DCO 7.12 - Habitats Regulations Assessment Report (Change Request) (Tracked) August 2022 (D6).pdf:98: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-002068-NZT DCO 8.5 - Environment Agency SoCG (Clean) August 2-22 (D6).pdf:11: plume impacts, emissions to air and the emerging BAT
EN010103-001023-NZT DCO 6.4.8 ES Vol III Appendix 8C Air Quality - Amine Degradation Assessment.pdf:12: dispersion, not temporal change. In the real world, as the plume travels
EN010103-001023-NZT DCO 6.4.8 ES Vol III Appendix 8C Air Quality - Amine Degradation Assessment.pdf:14: released would have been converted to N-amine by the time the plume
EN010103-001023-NZT DCO 6.4.8 ES Vol III Appendix 8C Air Quality - Amine Degradation Assessment.pdf:17: recommended by CERC for low concentration plumes for the Amines
EN010103-001023-NZT DCO 6.4.8 ES Vol III Appendix 8C Air Quality - Amine Degradation Assessment.pdf:17: module) to represent slower mixing of the ambient air within the plume –
EN010103-001023-NZT DCO 6.4.8 ES Vol III Appendix 8C Air Quality - Amine Degradation Assessment.pdf:17: rather than instantaneous mixing with an ambient air “parcel” at plume
EN010103-001023-NZT DCO 6.4.8 ES Vol III Appendix 8C Air Quality - Amine Degradation Assessment.pdf:19: the additional dispersion of the plume over the greater distance and the
EN010103-001023-NZT DCO 6.4.8 ES Vol III Appendix 8C Air Quality - Amine Degradation Assessment.pdf:23: formation in the emission plume from a carbon capture plant. Onel, L.
EN010103-001478-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Tracked.pdf:51: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-001478-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Tracked.pdf:51: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-001478-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Tracked.pdf:51: low and the thermal plume associated with release of water will be very localised.
EN010103-001478-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Tracked.pdf:90: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-001478-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Tracked.pdf:90: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-001478-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Tracked.pdf:91: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-002037-Orsted Hornsea Project Four Limited - Responses to the ExA’s ExQ2.pdf:34:the impact of this on seismic data quality and ability to monitor the CO2 plume.
EN010103-002037-Orsted Hornsea Project Four Limited - Responses to the ExA’s ExQ2.pdf:35:different acquisition techniques and exclusion zones the ability of 4D seismic to monitor the CO2 plume.
EN010103-002037-Orsted Hornsea Project Four Limited - Responses to the ExA’s ExQ2.pdf:297: seabed to Bunter, and the ability to monitor the spread of the CO2 plume;
EN010103-002037-Orsted Hornsea Project Four Limited - Responses to the ExA’s ExQ2.pdf:297: spread of the CO2 plume;
EN010103-001780-NZT DCO 9.7 - Applicants' Response to ExA's FWQs - June 2022.pdf:11: No maximum width is stated for either stack. Their final locations are not fixed effects that affect the dispersion of the plume from the stack on top of the
EN010103-001780-NZT DCO 9.7 - Applicants' Response to ExA's FWQs - June 2022.pdf:11: Can the Applicants confirm the minimum width parameter for the main further increasing the momentum of the plume on exit from the stack and
EN010103-001780-NZT DCO 9.7 - Applicants' Response to ExA's FWQs - June 2022.pdf:35: (CO) and ammonia (NH3) would be higher from the carbon capture stack during unabated operation will mean that the plume has
EN010103-001780-NZT DCO 9.7 - Applicants' Response to ExA's FWQs - June 2022.pdf:35: absorber than those from the CCGT running in unabated mode? improved thermal buoyancy compared to the plume from the absorber
EN010103-001780-NZT DCO 9.7 - Applicants' Response to ExA's FWQs - June 2022.pdf:35: ii) What consequences would this have for the visibility of the plume? stack in abated mode and therefore, will result in greater dispersion
EN010103-001780-NZT DCO 9.7 - Applicants' Response to ExA's FWQs - June 2022.pdf:36: plume than the absorber stack operating in abated mode. A plume
EN010103-001780-NZT DCO 9.7 - Applicants' Response to ExA's FWQs - June 2022.pdf:38: prevailing wind direction would mean that the plume would travel away from the
EN010103-001780-NZT DCO 9.7 - Applicants' Response to ExA's FWQs - June 2022.pdf:153: available information about operational effluent discharges to conclude a slight Bay during operation is based on the fact that i) the thermal plume modelling
EN010103-001130-NZT DCO 6.4.41 ES Vol III Appendix 17C Potential Viewpoints.pdf:7: the background view. A plume and pylons are visible above
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:6:Results of near-field thermal plume modelling undertaken using the CORMIX modelling software show
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:6:that, for Outfall 1 under spring conditions, the likely extent of a thermal plume (with a 15°C excess
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:6:extent of the plume increases to 140 m. Considering a further reduced excess temperature shows that
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:6:and 720 m on an ebb. In all cases tested, the mixing and plume dispersion appear to occur very rapidly
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:6:outfall plume, the neap tidal phases offer a larger plume, with the 2°C contour extending 600 m and
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:6:Far field plume dispersion modelling using the Delft3D model shows a small impact of outfall discharge
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:7: 1.1 Near-field thermal plume modelling ……………………………………………………………………………………..2
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:7: 1.2 Far-field thermal plume modelling …………………………………………………………………………………………2
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:8:Table 10. Thermal plume properties in Delft3D, summer and winter case …………………………………… 17
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:8:Figure 14. Spring and neap flood tide plume variations during normal discharge events. ………… 13
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:8:Figure 15. Spring and neap ebb tide plume variations during normal discharge events. …………… 14
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:11:Figure 82. Spring and neap flood tide plume variations during extreme discharge events. ………. 91
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:11:Figure 83. Spring and neap ebb tide plume variations during normal discharge events. …………… 92
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:12:AECOM Ltd. have commissioned ABPmer to undertake hydrodynamic and thermal plume modelling of
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:14: Near-field thermal plume modelling at two different outfall locations; and
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:14: Far-field 3D thermal plume modelling.
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:14:1.1 Near-field thermal plume modelling
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:14:model to construct thermal plume simulations using the MixZon Inc. CORMIX modelling software.
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:14:quantify the possible extent of a plume from both outfall locations with particular thermal properties.
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:14:1.2 Far-field thermal plume modelling
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:14:Section 2: CORMIX Modelling – Outfall 1: Provides details of the thermal plume model setup and
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:14:Section 3: CORMIX Modelling – Outfall 2: Provides details of the updated thermal plume
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:16:CORMIX thermal plume modelling, as described in the following sections.
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:19:flood and ebb conditions as in Table 1) and shows the ebb plume (Run 10) to better maintain its excess
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:19:Shown in Figure 7 is the plume sensitivity to winds. The summer wind value of 4.08 m/s is a light wind
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:19:and doesn’t appear to have any influence on the plume when comparing runs 01 and 03. When a
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:19:significantly stronger wind of 15 m/s is applied (Run 16), the plume is slightly affected causing the excess
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:20:Figure 8 shows the tests addressing the plume sensitivity to the discharge port diameter. The baseline
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:20:Figure 9 shows the plume sensitivity to projection of the outfall port. Run 01 has a vertical projection
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:23:As stated in Section 2, CORMIX modelling, assessing the near-field impact of the of thermal plume has
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:35:In order to test the sensitivity of the plume discharge to wind directions, two further simulations have
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:35: differences in the distribution of the thermal plume:
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:35: When a south easterly (120°) wind is applied to the summer thermal plume discharge scenario
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:35: the effect is to reduce the eastern extent of the thermal plume. This is more pronounced in the
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:35: neap comparisons where flow speeds are lower and the along-coast extent of the plume is
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:40:the Outfall 1 site are consistently higher which may be contributing to faster dispersion of the plume as
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:40:This plot shows the along shore flow directing the plume discharge into the estuary. Plot Figure 29
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:Near-field thermal plume modelling has been undertaken using the CORMIX modelling software to
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:conditions, the likely extent of a thermal plume (of the properties modelled) would be very localised: a
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:m on the ebb. Considering a 2°C temperature excess the ebb extent of the plume increases to 140 m,
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:To examine the wider plume dispersion a 0.1°C temperature excess contour was exported from CORMIX.
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:allow the plume to stay buoyant for longer, however the excursion from the plume would be limited by
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:Sensitivity testing showed only a small influence on plume extent due to wind and seasonal variations,
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:the plume.
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:outfall plume, the neap tidal phases offer a larger plume, when compared to the spring tide, under
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:normal discharge conditions. In particular, the neap flood tide offers the largest plume extent as
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:However, it is to be noted that the CORMIX model assumes full plume development under the given
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:enough for a fully developed plume (as defined) to form. As the flows reduce, either side of the peak
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:conditions modelled, and turn with the tidal phase, further dissipation of the plume is expected before
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:Far field plume dispersion modelling has been undertaken using the Delft3D modelling software using
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:48:Temperature excess plots of the plume impact have shown a small impact of the outfall discharge on
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:55:thermal plume or contamination modelling.
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:103:Figure 82 shows the downstream temperature excess of the resultant plume during a spring (run 26)
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:103:characteristics again result in a more extensive plume, reducing the excess temperature at a slower rate
EN010103-001144-NZT DCO 6.4.33 ES Vol III Appendix 14E Coastal Modelling Report.pdf:103:Figure 82. Spring and neap flood tide plume variations during extreme discharge events.
EN010103-001159-NZT DCO 5.7 - Carbon Capture Readiness Assessment.pdf:23: each Absorber. An early evaluation of the potential visible plumes has been
EN010103-002066-NZT DCO 8.4 - Marine Management Organisation SoCG (Clean) August 2022 (D6).pdf:25: preliminary prediction that any “plume” would quickly dissipate and is likely to be ecological
EN010103-002078-NZT DCO - 9.27 Applicants’ Response to the ExA's Second Written Questions - August 2022 (D6).pdf:252: behaviour of the CO2 plume and possible migration out of the CO2 store.
EN010103-002078-NZT DCO - 9.27 Applicants’ Response to the ExA's Second Written Questions - August 2022 (D6).pdf:254: CO2 plume. In that sense, OBN and P-cables (and a hybrid of the two) are
EN010103-002078-NZT DCO - 9.27 Applicants’ Response to the ExA's Second Written Questions - August 2022 (D6).pdf:260: conformance of the CO2 plume.
EN010103-002078-NZT DCO - 9.27 Applicants’ Response to the ExA's Second Written Questions - August 2022 (D6).pdf:261: operators to ensure containment and conformance of a CO2 plume. In that sense, OBN
EN010103-002078-NZT DCO - 9.27 Applicants’ Response to the ExA's Second Written Questions - August 2022 (D6).pdf:262: conformance of the CO2 plume. Mr Sewell saying that he is not suggesting that bp
EN010103-002078-NZT DCO - 9.27 Applicants’ Response to the ExA's Second Written Questions - August 2022 (D6).pdf:262: ability to monitor the CO2 plume.
EN010103-002078-NZT DCO - 9.27 Applicants’ Response to the ExA's Second Written Questions - August 2022 (D6).pdf:265: exclusion zones the ability of 4D seismic to monitor the CO2 plume.”
EN010103-001526-NZT-ExQ1.pdf:20: ii) What consequences would this have for the visibility of the plume?
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:2:Annex B: Assessment of Visible Plumes from absorber stack and cooling towers 8-33
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:3:8.1.7 Annex B of this Appendix provides an assessment of visible plumes from the
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:Annex B: Assessment of Visible Plumes from
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:relatively low temperature of the release, there is potential for the plume released from
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:the stack to be visible. The ADMS module can assess the potential for visible plumes
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:The plume from the stack is described as being “visible” when liquid water is present
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:in the plume above a critical threshold of 0.002kg/kg.
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:plumes, however this guidance is now outdated. An assessment has therefore been
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:emission, except for the selection of plume visibility in the model set-up and the input
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:of initial water content in the plume. The initial water vapour mixing ratio of the plume
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:5 defines the plume to be ‘visible’ at a particular downwind distance if the ambient
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:humidity at the plume centreline is below 98%, above which it is considered the plume
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:would lead to the worst-case visible plumes, with plumes being visible for up to 40%
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:of the time. The plume would only be longer than 115 metres (i.e. the height of the
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:Table B1: Summary of Visible Plumes for a 35°C Release
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35:Year Plume is Visible Plume Length Plume Length (m)
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:35: Plume Over 115m
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36:Table B2: Summary of Visible Plumes for a 60°C Release
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36:Year of Time Plume Length (m) Plume Length (m) There is a Visible Plume
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36: Plume is Over 115m
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36:In addition to the potential for visible plumes to occur from the absorber stack, there is
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36:also potential for visible plumes to occur from the mechanical draft cooling towers. The
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36:potential for visible plumes to occur from the cooling cells has therefore been modelled
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36:Table B3: Cooling Cell Visible Plume Model Inputs
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36:indicate that a short visible plume may be present for the majority of the time once the
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36:plume is predicted to exceed the boundary of the Low Carbon Electricity Generating
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36:Table B4: Cooling Cell Visible Plumes
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36:Met Percentage of Longest Average Visible Plume Percentage of Time There
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36:Year Time Plume is Visible Length (m) is a Visible Plume Over
EN010103-001022-NZT DCO 6.4.7 ES Vol III Appendix 8B Air Quality - Operation Phase.pdf:36: Visible Plume 100m
EN010103-002509-NZT DCO 7.16 - HRA for Change Request (Tracked) - Nov 2022 (D12).pdf:50: always met within a few metres of the outfall and before the plume meets the water
EN010103-002509-NZT DCO 7.16 - HRA for Change Request (Tracked) - Nov 2022 (D12).pdf:52: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002509-NZT DCO 7.16 - HRA for Change Request (Tracked) - Nov 2022 (D12).pdf:52: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002509-NZT DCO 7.16 - HRA for Change Request (Tracked) - Nov 2022 (D12).pdf:52: low and the thermal plume associated with release of water will be very localised.
EN010103-002509-NZT DCO 7.16 - HRA for Change Request (Tracked) - Nov 2022 (D12).pdf:98: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002509-NZT DCO 7.16 - HRA for Change Request (Tracked) - Nov 2022 (D12).pdf:98: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002509-NZT DCO 7.16 - HRA for Change Request (Tracked) - Nov 2022 (D12).pdf:99: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-001588-NZT DCO 8.6 - NE SoCG - May 2022.pdf:48: noted that at this location, the wind direction takes the plume over
EN010103-000885-NZT DCO 5.13 - Habitat Regulations Assessment Report.pdf:51: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-000885-NZT DCO 5.13 - Habitat Regulations Assessment Report.pdf:51: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-000885-NZT DCO 5.13 - Habitat Regulations Assessment Report.pdf:51: low and the thermal plume associated with release of water will be very localised.
EN010103-000885-NZT DCO 5.13 - Habitat Regulations Assessment Report.pdf:89: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-000885-NZT DCO 5.13 - Habitat Regulations Assessment Report.pdf:89: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-000885-NZT DCO 5.13 - Habitat Regulations Assessment Report.pdf:90: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-002056-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) August 2022 (D6).pdf:52: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002056-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) August 2022 (D6).pdf:52: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002056-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) August 2022 (D6).pdf:52: low and the thermal plume associated with release of water will be very localised.
EN010103-002056-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) August 2022 (D6).pdf:94: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002056-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) August 2022 (D6).pdf:94: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002056-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) August 2022 (D6).pdf:95: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-001479-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Final 2022-04-26.pdf:50: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-001479-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Final 2022-04-26.pdf:51: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-001479-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Final 2022-04-26.pdf:51: low and the thermal plume associated with release of water will be very localised.
EN010103-001479-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Final 2022-04-26.pdf:89: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-001479-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Final 2022-04-26.pdf:89: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-001479-NZT DCO 5.13 Habitat Regulations Assessment Report Rev 3 Final 2022-04-26.pdf:90: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-001849-5.13 - HRA Report (Clean) - June 2022(D3).pdf:52: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-001849-5.13 - HRA Report (Clean) - June 2022(D3).pdf:52: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-001849-5.13 - HRA Report (Clean) - June 2022(D3).pdf:53: low and the thermal plume associated with release of water will be very localised.
EN010103-001849-5.13 - HRA Report (Clean) - June 2022(D3).pdf:91: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-001849-5.13 - HRA Report (Clean) - June 2022(D3).pdf:91: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-001849-5.13 - HRA Report (Clean) - June 2022(D3).pdf:92: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-001153-NZT DCO 5.9 - Statutory Nuisance Statement.pdf:22: Visual Plume (Steam)
EN010103-001153-NZT DCO 5.9 - Statutory Nuisance Statement.pdf:22:4.4.13 It is envisaged that there will not be any visible plumes (steam) during the
EN010103-001153-NZT DCO 5.9 - Statutory Nuisance Statement.pdf:22: the frequency of a visual plume. The visibility of an atmospheric plume is due to the
EN010103-001153-NZT DCO 5.9 - Statutory Nuisance Statement.pdf:22: visible plume emissions. The plume visibility implications have been considered as
EN010103-001153-NZT DCO 5.9 - Statutory Nuisance Statement.pdf:22: ‘average’ visible plume length is expected to be 42 m with plumes visible for up to
EN010103-001153-NZT DCO 5.9 - Statutory Nuisance Statement.pdf:22: 72% of the time. The longest plume can be expected to extend for 2,348 m with
EN010103-001153-NZT DCO 5.9 - Statutory Nuisance Statement.pdf:22: plumes over 115 m visible 9% of the time on average.
EN010103-002387-Environment Agency - Comments on any other information submitted at Deadline 10.pdf:1: How can this plume fail to reach the water surface? Typically, effluent plumes are trapped at
EN010103-002387-Environment Agency - Comments on any other information submitted at Deadline 10.pdf:1: is not clear that this configuration will give sufficient accuracy to capture the effluent plume.
EN010103-002387-Environment Agency - Comments on any other information submitted at Deadline 10.pdf:1: Please comment on the effect this may have on the concentrations / extent of the plume,
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:24:plume development away from wells. Further studies are required before a definitive conclusion can be
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:24:monitoring storage conformance and CO2 plume development away from wells. This would be unless
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:25: • CCUS operator to provide current MMV requirements for CO2 plume monitoring for the
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:42:where possible the CO2 plume and where appropriate the surrounding environment. The initial plan
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:42:Monitoring plume development from the injection wells is a key indicator of storage site behaviour.
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:43:The plume will continue to migrate after injection with time lapse seismic providing confirmation.
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:43:confirm the migration of the CO2 plume if required. If the storage site is behaving as expected
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:46:Four monitor surveys were proposed over the lifecycle of the storage site based on the fact that plume
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:46:injection on plume migration and assessment of store and well integrity. However, the cost of acquiring
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:49:offer the potential for accurate monitoring of the plume and seabed deformation (as a by-product of
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:51: • The size of array would be based on models. If model prediction of plume development is
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:51: wrong and the plume extends outside of the predicted area the array would lack the necessary
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:51:value of DAS/DTS to monitor plume growth. At these locations downhole DAS/DST has been used to
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:51:effective method of monitoring plume growth.
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:51: • Sparse PRM system focused on injectors and early plume area. This is the area where storage
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:63:injection on plume migration and assessment of store integrity. However, navigating a 3D seismic
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:64: • Sparse PRM system focused on injectors and early plume area. This is the area where storage
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:75:hypersaline plume rapidly over an area of 10 - 100s of metres in all directions. Where the brine is
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:75:hypersaline brine diffusion. They suggest that the model used is more appropriate for far-field plume
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:75:simulations and therefore not suited to measure near to mid field spreading of the plume.
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:88:plume development away from wells. Further studies are required before a definitive conclusion can be
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:88:acquisition for monitoring storage conformance and CO2 plume development away from wells. This
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:88: • CCUS operator to provide current MMV requirements for CO2 plume monitoring for the
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:88:The focus of this section was to review MMV activities that are mainly used to monitor CO2 plume
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:88:injection on plume migration and assessment of store integrity. However, there are challenges with
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:89: • Sparse PRM system focused on injectors and early plume area. This is the area where storage
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:93:24 “Using a Walk Away DAS Time-lapse VSP fro CO2 Plume Monitoring at the Quest CCS
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:93: plume-monitoring. Accessed Jan 2022.
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:122: from injecting CO2 into the store and tracking the CO2 plume needs to be acquired and
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:126: the extent, and manner in which, the CO2 plume migrates within the store;
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:126: the store is developed using actual, observed CO2 plume migration information
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:126: way of detecting and identifying the extent to which, over time, the location of the plume of
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:127: a very different migration of a CO2 plume.
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:127: Figure 5: Examples of how the CO2 plume may behave in simple and complex
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:127: “light up” where and how the CO2 plume behaves following CO2 injection.
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:129: settlement of the CO2 plume.
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:130: NEP. The use of proven technology to monitor the CO2 plume and Endurance Store
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:135: physically undevelopable. This is due to the inability of NEP to image the CO2 plume in all
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:153:CO2 within the storage complex and monitor CO2 plume migration within the reservoir.
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:153:producers will be progressively located based on actual, observed CO2 plume migration (also
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:154:plume detection within a saline aquifer, is the most established and well-understood
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:168:to which the CO2 forms a central plume versus moves in unexpected ways which could lead
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:169:the reservoir and forms a crestal plume. In the complex scenario compartmentalisation (left) and vertical
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:169:stratification (right) inhibit cretal plume formation and the location of the CO2 in the reservoir is much more
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:169: © A plume of CO2 forms in the crest of the structure
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:182: • manage evacuation from a possible CO2 plume dispersion pathway, or
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:189: • Risk of CO2 plumes within the windfarm during manned activity
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:196:containment and conformance of the CO2 plume within the storage site. Its effectiveness lies
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:196:saturations over time. The quality of the data showed that actual plume migration was
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:196:instrumental in accurate plume migration detection and mapping, thus revealing the complex
EN010103-001776-NZT DCO 9.8 - Appendix GEN.1.2 Position Statement Hornsea Project Four and BP - June 2022.pdf:199:developing” approach. As the CO2 plume migration is observed over time through high quality
EN010103-001779-NZT DCO 9.8 - Appendix BIO.1.39 Example Marine Pollution Contingency Plan - June 2022.pdf:35: • As dispersion is achieved it will produce a ‘smoke plume’ plume in the water. The dispersion will
EN010103-001779-NZT DCO 9.8 - Appendix BIO.1.39 Example Marine Pollution Contingency Plan - June 2022.pdf:35: • If too much dispersant is being applied, a milky white plume will appear close to the surface of the
EN010103-001779-NZT DCO 9.8 - Appendix BIO.1.39 Example Marine Pollution Contingency Plan - June 2022.pdf:37: of dispersion, if dispersion is achieved it will produce a grey or coffee-coloured plume in the
EN010103-001779-NZT DCO 9.8 - Appendix BIO.1.39 Example Marine Pollution Contingency Plan - June 2022.pdf:37: If a white plume is visible in the water this indicates that overdosing has occurred. To prevent
EN010103-001581-NZT DCO 5.3 - Planning Statement - May 2022.pdf:230: structure (including any associated emission plume) after mitigation.
EN010103-002330-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) Oct 2022 (D9).pdf:51: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002330-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) Oct 2022 (D9).pdf:51: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002330-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) Oct 2022 (D9).pdf:52: low and the thermal plume associated with release of water will be very localised.
EN010103-002330-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) Oct 2022 (D9).pdf:96: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002330-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) Oct 2022 (D9).pdf:96: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002330-NZT DCO 5.13 - Habitats Regulations Assessment Report (Clean) Oct 2022 (D9).pdf:97: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-000896-NZT DCO 6.2.4 ES Vol I Chapter 4 Proposed Development.pdf:8: draught cooling towers. These can give rise to visible plumes of water vapour
EN010103-000896-NZT DCO 6.2.4 ES Vol I Chapter 4 Proposed Development.pdf:8: dependent on the ambient weather conditions. A short visible plume may be
EN010103-000896-NZT DCO 6.2.4 ES Vol I Chapter 4 Proposed Development.pdf:8: operational. However, the proportion of time that the visible plume is predicted
EN010103-002177-NZT DCO 6.4.49 - ES Vol III Appendix 25A Commitments Register Sept 2022(D7) (Tracked).pdf:13: volumes and to assist the dissipation of any plume a
EN010103-001151-NZT DCO 6.4.49 ES Vol III Appendix 25A Commitments Register.pdf:10:Appendix 5A – relatively low discharge volumes and to assist the dissipation of any plume a diffuser will be
EN010103-001850-5.13 - HRA Report (Tracked) - June 2022(D3).pdf:52: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-001850-5.13 - HRA Report (Tracked) - June 2022(D3).pdf:52: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-001850-5.13 - HRA Report (Tracked) - June 2022(D3).pdf:53: low and the thermal plume associated with release of water will be very localised.
EN010103-001850-5.13 - HRA Report (Tracked) - June 2022(D3).pdf:91: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-001850-5.13 - HRA Report (Tracked) - June 2022(D3).pdf:91: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-001850-5.13 - HRA Report (Tracked) - June 2022(D3).pdf:92: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-001915-NZT DCO 9.20 - Applicants response to Orsted HP4 D3 Submission July 2022 (D4).pdf:21: be used will lead to high quality data, sufficient to accurately monitor the CO2 plume (even
EN010103-001915-NZT DCO 9.20 - Applicants response to Orsted HP4 D3 Submission July 2022 (D4).pdf:23: to Bunter, and thus the ability to monitor the spread of the CO2 plume. Part of this
EN010103-001915-NZT DCO 9.20 - Applicants response to Orsted HP4 D3 Submission July 2022 (D4).pdf:27: non-containment or non-conformance of the CO2 plume.
EN010103-001915-NZT DCO 9.20 - Applicants response to Orsted HP4 D3 Submission July 2022 (D4).pdf:36: the higher resolution required to be able to detect CO2 away from the main plume.
EN010103-001915-NZT DCO 9.20 - Applicants response to Orsted HP4 D3 Submission July 2022 (D4).pdf:36: after the injection phase is completed in order to ensure the stability of the plume.
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:4: necessary 4D seismic monitoring of the CO2 plume. Towed streamer will have a lower cost and is
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:4: ability to monitor the spread of the CO2 plume. Part of this evaluation should include field trials
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:18:Endurance area to map the spread of the injected CO2 plume in the subsurface while the area is partially covered
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:19:monitoring of the CO2 plume. Towed streamer will have a lower cost and is the default choice for a reservoir such
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:19:the impact on imaging from seabed to Bunter, and thus the ability to monitor the spread of the CO2 plume. Part of
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:23:subsurface imaging and monitoring of the spread of the CO2 plume. These permanent nodes for microseismic
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:24:acquisition for monitoring storage conformance and CO2 plume development away from wells”. I don’t agree with
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:25:even small amounts of CO2 are present outside of the main plume, but high resolution seismic is required to image
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:29:seismic acquisition is uniquely suited to the shallow geology and CO2 plume detection within a saline aquifer, is the
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:34:better, and should be modelled. The OBN 4D data would then be able to monitor the spread of the CO2 plume in
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:35:acquiring the high resolution data needed to verify containment and conformance of the CO2 plume within the
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:35:plume development. This favourable outcome is attributed to the time-lapse processing and the large contrast in
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:36:highlighted by Furre et al. Nonetheless the 4Ds have been successful at tracking the CO2 plume.
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:38:compartmentalisation effects”. The imaging of potential compartments and 4D effects for tracking the CO2 plume
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:39:without compromising the ability of the 4D data to image the CO2 plume.
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:41:CO2 plume into the formation. This can either be a time-lapse seismic monitoring where 3D surveys are repeated at
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:42:of the K42 White Rose report describes it thus “The development of the plume and the migration of the injected CO2
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:46:should be able to provide the necessary 4D seismic monitoring of the CO2 plume. Towed streamer will have a
EN010103-001824-Orsted Hornsea Project Four Limited - Comments on the Applicants’ dDCO.pdf:47:on imaging from seabed to Bunter, and thus the ability to monitor the spread of the CO2 plume. Part of this
EN010103-000906-NZT DCO 6.2.22 ES Vol I Chapter 22 Major Accidents and Natural Disasters.pdf:33: A CO2 plume from a release neighbouring industrial sites is
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:22:with the water effluent plume from effluent containing noted that there is no WFD classification available for nitrogen
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:23:sediment plumes need to be taken into account in the Screening stage (see paragraph 9.5.6 and Table 9C-10). At
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:23: sediment plumes, and this is considered in Table 9C-15 (Tees
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:23: Potential impacts from a thermal/sediment plume scoped into
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:23: plumes have taken consideration of the spatial area of impact
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:53: adjacent to the waterbody. There is also the potential for an effluent plume
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:57: physical disturbance and changes in water quality (e.g. a sediment plume
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:57: outfall causing thermal plumes or chemical changes in water quality including
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:57: effluent plumes:
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:57: potential sediment, chemical or thermal plume to be produced by the
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:58: chemical effluent plume may be larger and
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:58: chemical effluent plume may be larger and
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:58: the ZoI of the DIN effluent plume from the
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:59: operational impacts such as the release of a thermal plume from process
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:59:change in depth or discharge plume or pollutants in
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:62:Biology: Habitats Habitats and benthic Potential temporary sediment plume during
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:62: invertebrates construction or thermal/chemical plume during
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:62: create a plume that would slightly enter the mouth of the estuary, although
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:64: plume that would slightly enter the
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:64: plume (for DIN) to enter the mouth of the estuary, at depth within the dredged
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:65: noting that this also includes the footprint of thermal or sediment plumes:
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:65:0.5 km2 or ✓ Any plume relating to runoff laden with fine
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:65:1% or more of ✓ Any plume relating to runoff laden with fine
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:65: effluent plume from the new outfall location.
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:67: conditions, and at depth (i.e. not at the surface; plume
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:79: sediment plume.
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:79:9.7.51 However, it is considered that any sediment plume arising from this
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:79: and mammals are able to avoid the plume. Furthermore, the relatively
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:79: scale and any sediment plume would be very quickly dispersed by the
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:95:9.7.135 Mixing zone plumes in CORMIX are modelled over different stages; the
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:95: rising stage) and the later period of mixing when the plume reaches the water
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:95: by diffusion of the plume into the large ambient water volume. Further details
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:95: the thermal plume and the apparent degree of mixing, it is unlikely that the
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:95: habitats and associated communities within the footprint of the thermal plume
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:95: between the small thermal plume and intertidal habitats and so the magnitude
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:95: thermal plume has been shown to be very localised, and thermal effluent
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:95: footprint of the thermal plume on the seabed will likely be further reduced.
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:96: such as sandeels) to the thermal plume is unlikely to result in changes to
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:96: communities in terms of abundance and diversity. The thermal plume is
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:96: establishment of non-natives linked to the thermal plume is therefore
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:99: plume rising stage for low tide, high tide and maximum current conditions.
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:114: within the Tees Bay. A smaller area within the wider plume will exceed the
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:171:concentrations are diluted to below the EQS. Mixing zone plumes in CORMIX are modelled over
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:171:period of mixing when the plume reaches the water surface and spreads laterally (the surface spreading
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:171:while dilution during the surface spreading stage is more dominated by diffusion of the plume into the
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:171:zone plumes in different ways depending on the current conditions specified:
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:171: pair of ports and resolve the dimensions of the resulting three individual plumes (Figure 4-2).
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:172: resolve individual mixing plumes for each pair of outfalls, although the plumes are significantly
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:172: of each plume and for the surface spreading stage. The plumes combine and become vertically
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:172: 0.271 m/s respectively) the plumes undergo rapid lateral mixing at the point of discharge.
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:172: CORMIX represents this by combining the plumes into a single mixing zone for both the vertical
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:172:mixing plume above the outfall, the lateral distance travelled by the plume and the cross section width
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:172:of the mixing zone plume at the point when the EQS is reached. If the EQS is met in the surface
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:173:plume rising stage.
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:173: Plume Cross Section Width 1.9 0.5 1.0 0.6 0.9
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:173: Plume Cross Section Width 15
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:173: Plume Cross Section Width 15 immediately on discharge
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:173: Plume Cross Section Width 1.8 0.4 0.5 0.3 0.5
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:173: Plume Cross Section Width 1.9 0.5 1.0 0.4 0.3
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:173: Plume Cross Section Width 15 immediately on discharge
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:173: Plume Cross Section Width 15 immediately on discharge
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:173: Plume Cross Section Width 1.8 0.4 0.8 0.3 0.3
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:173:The results in Table 4-3 show that EQS values for all substances are met within the plume rising stage
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:174:scenario is 0.34 m/s and the EQS for all substances are met during the plume rising stage. Results are
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:175: Plume Cross Section Width 0.6 discharge 0.7 0.6
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:175: Plume Cross Section Width
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:175: Plume Cross Section Width
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:175: Plume Cross Section Width 0.6 discharge 0.7 0.6
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:175: Plume Cross Section Width 0.6 discharge 0.7
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:175: Plume Cross Section Width
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:175: Plume Cross Section Width
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:175: Plume Cross Section Width 0.6 discharge 0.7
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:184:plume reaches the water surface. Thermal effects are also extremely small, with the temperature of the
EN010103-002423-NZT DCO - 6.4.11 ES Vol III Appendix 9C WFD Assessment - Oct 2022 (D11) (Clean).pdf:184:mixing plume falling below 3°C above ambient conditions within a very short distance. Surface
EN010103-002257-NZT DCO - 5.13 - HRA (Clean) - Sept 2022(D8).pdf:52: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002257-NZT DCO - 5.13 - HRA (Clean) - Sept 2022(D8).pdf:52: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002257-NZT DCO - 5.13 - HRA (Clean) - Sept 2022(D8).pdf:53: low and the thermal plume associated with release of water will be very localised.
EN010103-002257-NZT DCO - 5.13 - HRA (Clean) - Sept 2022(D8).pdf:94: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002257-NZT DCO - 5.13 - HRA (Clean) - Sept 2022(D8).pdf:94: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002257-NZT DCO - 5.13 - HRA (Clean) - Sept 2022(D8).pdf:95: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-001150-NZT DCO 6.4.48 ES Vol III Appendix 24C Statement of Combined Effects.pdf:42: • visible plume from the Proposed
EN010103-001150-NZT DCO 6.4.48 ES Vol III Appendix 24C Statement of Combined Effects.pdf:50: • Plume arising from the stack experience short-term moderate
EN010103-002236-NZT DCO 8.4 - MMO SoCG (Tracked) - Sept 2022(D8).pdf:25: preliminary prediction that any “plume” would quickly dissipate and is likely to be ecological
EN010103-002057-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) August 2022 (D6).pdf:53: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002057-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) August 2022 (D6).pdf:53: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002057-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) August 2022 (D6).pdf:53: low and the thermal plume associated with release of water will be very localised.
EN010103-002057-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) August 2022 (D6).pdf:96: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002057-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) August 2022 (D6).pdf:96: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002057-NZT DCO 5.13 - Habitats Regulations Assessment Report (Tracked) August 2022 (D6).pdf:97: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-000895-NZT DCO 6.2.9 ES Vol I Chapter 9 Surface Water, Flood Risk and Water Resources.pdf:79: cause an oxygen demand within the sediment plume.
EN010103-000895-NZT DCO 6.2.9 ES Vol I Chapter 9 Surface Water, Flood Risk and Water Resources.pdf:80:9.6.12 It is not considered that any sediment plume arising from MBT construction
EN010103-000895-NZT DCO 6.2.9 ES Vol I Chapter 9 Surface Water, Flood Risk and Water Resources.pdf:80: able to avoid the plume. Furthermore, the relatively shallow inshore of the
EN010103-000895-NZT DCO 6.2.9 ES Vol I Chapter 9 Surface Water, Flood Risk and Water Resources.pdf:87:9.6.48 Results of near-field thermal plume modelling undertaken using the CORMIX
EN010103-000895-NZT DCO 6.2.9 ES Vol I Chapter 9 Surface Water, Flood Risk and Water Resources.pdf:87: extent of a thermal plume (with a 15°C excess temperature at source) would
EN010103-000895-NZT DCO 6.2.9 ES Vol I Chapter 9 Surface Water, Flood Risk and Water Resources.pdf:87: temperature excess, the ebb extent of the plume increases to 140m.
EN010103-000895-NZT DCO 6.2.9 ES Vol I Chapter 9 Surface Water, Flood Risk and Water Resources.pdf:87: plume dispersion appear to occur very rapidly from the origin with very little
EN010103-000895-NZT DCO 6.2.9 ES Vol I Chapter 9 Surface Water, Flood Risk and Water Resources.pdf:87: rates of dissipation of the outfall plume, the neap tidal phases offer a larger
EN010103-000895-NZT DCO 6.2.9 ES Vol I Chapter 9 Surface Water, Flood Risk and Water Resources.pdf:88: plume, with the 2°C contour extending 600 m and 400 m from the outfall on
EN010103-000894-NZT DCO 6.2.8 ES Vol 1 Chapter 8 Air Quality.pdf:10: assessment, then this would have the potential to reduce the plume
EN010103-000894-NZT DCO 6.2.8 ES Vol 1 Chapter 8 Air Quality.pdf:25: the significance of visible plumes prior to DCO plumes has been carried out
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:56: sediment plume (with associated deposition effects) within the marine
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:59: plume of sediment which could present a barrier to migration.
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:87: found at the release point from the outfall – or the ‘thermal plume’ - may also
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:87: ‘Outfall 1’ and ‘Outfall 2’, respectively. To construct the thermal plume
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:88: discharge volumes proposed and to assist the dissipation of any plume, a
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:88: the largest thermal plume extent at the existing outfall was found to be during
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:89: largest plume was identified for a neap tide under normal discharge
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:89: provided the largest plume at both the existing and replacement outfalls,
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:90: thermal plume is predicted to be largest under this scenario), the likely extent
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:90: of thermal plume would be very localised with a 2°C temperature excess
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:90:14.6.195 At the replacement outfall, the likely extent of thermal plume during neap
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:90: tides (when the thermal plume is predicted to be largest under this scenario)
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:91: arising from the plume even when precautionary assumptions have been used
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:91: the faster dispersion of the plume. However, in some scenarios the thermal
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:91: plume from the existing outfall was seen inside the mouth of the estuary and
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:92: the Estuary. In the winter spring tide simulation, where the plume extended
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:92: overlap between the HPS discharge and the thermal plume from either the
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:92: extremities of the plume (i.e. where the temperature excess is <0.2°C). When
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:93:14.6.204 Given the highly limited predicted extent of the thermal plume in both
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:93: the footprint of the thermal plume are considered to be highly resistant and
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:93: limited interaction between the thermal plume and intertidal habitats and so
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:93:14.6.210 Table 14-19, the extent of the thermal plume within the water column at both
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:93: a small temperature uplift of 1°C the thermal plume is predicted to extend
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:93: water) and therefore the footprint of the thermal plume on the seabed will
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:94:14.6.216 Overall, the risk that treated effluent, and associated thermal plume,
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:94: thermal plume is therefore predicted to be Not Significant.
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:94:14.6.218 Table 14-19, the extent of the thermal plume from both the existing and
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:94: the results from far-field modelling, the extent of the plume is larger however,
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:95: sandeels) to the thermal plume is highly unlikely to result in changes to
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:95: change in sea temperature. The thermal plume is also not predicted to affect
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:95: of the extent of the thermal plume is away from the mouth of the Estuary and
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:104: species, where the SSC plume may prohibit upstream movement.
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:109: and create a sediment plume within the marine environment:
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:110: expected that any SSC plume would be small and would settle rapidly close
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:111: create a SSC plume which has the potential occur over larger distances. This
EN010103-000900-NZT DCO 6.2.14 ES Vol I Chapter 14 Marine Ecology and Nature Conservation.pdf:111: impacts to turbidity, a plume of sediment is unlikely to present a barrier to
EN010103-000917-NZT DCO 6.2.24 ES Vol I Chapter 24 Cumulative and Combined Effects.pdf:74: the SSC plume may prohibit upstream movement.
EN010103-002508-NZT DCO 7.16 - HRA for Change Request (Clean) - Nov 2022 (D12).pdf:50: always met within a few metres of the outfall and before the plume meets the water
EN010103-002508-NZT DCO 7.16 - HRA for Change Request (Clean) - Nov 2022 (D12).pdf:52: Finally, near-field thermal plume modelling has been undertaken for the
EN010103-002508-NZT DCO 7.16 - HRA for Change Request (Clean) - Nov 2022 (D12).pdf:52: proposed outfall location. This confirms that the likely extent of a thermal plume (of
EN010103-002508-NZT DCO 7.16 - HRA for Change Request (Clean) - Nov 2022 (D12).pdf:52: low and the thermal plume associated with release of water will be very localised.
EN010103-002508-NZT DCO 7.16 - HRA for Change Request (Clean) - Nov 2022 (D12).pdf:97: cooling water, which may lead to an increase in the turbidity and water temperature near the discharge point. However, modelling of the thermal plume
EN010103-002508-NZT DCO 7.16 - HRA for Change Request (Clean) - Nov 2022 (D12).pdf:97: resulting from discharge of heated cooling water has demonstrated that the plume is likely to be very localised (see paragraphs 4.3.19 – 4.3.22). Therefore,
EN010103-002508-NZT DCO 7.16 - HRA for Change Request (Clean) - Nov 2022 (D12).pdf:98: impact pathway has been dismissed. No cooling water discharge erosion effect will occur ‘in combination’ due to the very localised extent of the plume from
EN010103-002311-NZT DCO 6.4.49 - ES Vol III Appendix 25A Commitments Register Clean Oct 2022 (D9).pdf:12: volumes and to assist the dissipation of any plume a
EN010103-001134-NZT DCO 6.4.45 ES Vol III Appendix 20B- Navigational Risk Assessment Part 1.pdf:16: dissipation of any plume, a diffuser at the outfall head will be retrofitted if the
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:18:system scenarios (i.e. alternative outfall) the effluent plume may be discharged (i.e. this is a
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:34:Figure 4-2: Deflected Lateral Plume Mixing Zone…………………………………………………………………….. 22
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:51:that the mixing zone plume can take two different shapes depending on the current flow rate compared
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:51:to the discharge velocity; the plume either forms a vertical mixing zone extending towards the water
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:51:surface or a lateral plume extending along the direction of the current. The two plume shapes are shown
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:51:the vertical thickness of the plume. These dimensions will be quoted in Section 5 to show the size of
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:51:If a vertically rising plume reaches the water surface, then the effluent will spread horizontally at the
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:51:plume begins to spread at the surface level. The lateral extent of the surface mixing zone can become
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:51:large under this scenario, although the vertical rising plume thickness remains small. The extent of any
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:52: Figure 4-2: Deflected Lateral Plume Mixing Zone
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:53: Description of Plume Distance from outfall to reaching EQS
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:53: Plume is deflected horizontally a = 1.8 m a = 0.9 m a = 1.3 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:53: Min Plume rises vertically but does a = 0.12 m a = 0.03 m a = 0.05 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:53: Plume is deflected horizontally a = 1.2 m a = 0.9 m a = 1.2 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:53: Min Plume rises vertically but does a = 0.05 m a = 0.03 m a = 0.05 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:53: High Tide Plume rises vertically and only b = 2.6 m b = 1.6 m b = 1.9 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:53: Plume rises vertically but does b = 2.0 m b = 0.3 m b = 2.3 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:54: High Tide Plume rises vertically and b = 3.9 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:54: High Tide Plume rises vertically and b = 2.0 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:54:always met within a few metres of the outfall and before the plume meets the water surface. A thermal
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:54: Description of Plume Distance from outfall to reaching EQS
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:54: Plume is deflected horizontally
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:55: Plume is deflected horizontally a = 1.2 m a = 0.8 m a = 1.2 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:55: Min Plume rises vertically but does a = 0.05 m a = 0.03 m a = 0.05 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:55: High Tide Plume rises vertically and only b = 2.6 m b = 1.6 m b = 1.9 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:55: Plume rises vertically but does b = 1.7 m b = 1.6 m b = 1.9 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:55: High Tide Plume rises vertically and b = 3.1 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:55: Plume rises vertically but does b = 1.9 m
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:55:always met within a few meters of the outfall and before the plume meets the water surface. A thermal
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:65:the EQS within a very short distance of the outfall and before the mixing plume reaches the water
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:65:surface. Thermal effects are also extremely small, with the temperature of the mixing plume falling
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:65:below 3°C above ambient condition within a very short distance and usually before the plume reaches
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:75:Results of near-field thermal plume modelling undertaken using the CORMIX modelling software show
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:75:that, for Outfall 1 under spring conditions, the likely extent of a thermal plume (with a 15°C excess
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:75:extent of the plume increases to 140 m. Considering a further reduced excess temperature shows that
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:75:and 720 m on an ebb. In all cases tested, the mixing and plume dispersion appear to occur very rapidly
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:75:outfall plume, the neap tidal phases offer a larger plume, with the 2°C contour extending 600 m and
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:75:Far field plume dispersion modelling using the Delft3D model shows a small impact of outfall discharge
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:76: 1.1 Near-field thermal plume modelling ……………………………………………………………………………………..2
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:76: 1.2 Far-field thermal plume modelling …………………………………………………………………………………………2
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:77:Table 10. Thermal plume properties in Delft3D, summer and winter case …………………………………… 17
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:77:Figure 14. Spring and neap flood tide plume variations during normal discharge events. ………… 13
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:77:Figure 15. Spring and neap ebb tide plume variations during normal discharge events. …………… 14
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:80:Figure 82. Spring and neap flood tide plume variations during extreme discharge events. ………. 91
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:80:Figure 83. Spring and neap ebb tide plume variations during normal discharge events. …………… 92
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:81:AECOM Ltd. have commissioned ABPmer to undertake hydrodynamic and thermal plume modelling of
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:83: Near-field thermal plume modelling at two different outfall locations; and
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:83: Far-field 3D thermal plume modelling.
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:83:1.1 Near-field thermal plume modelling
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:83:model to construct thermal plume simulations using the MixZon Inc. CORMIX modelling software.
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:83:quantify the possible extent of a plume from both outfall locations with particular thermal properties.
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:83:1.2 Far-field thermal plume modelling
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:83:Section 2: CORMIX Modelling – Outfall 1: Provides details of the thermal plume model setup and
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:83:Section 3: CORMIX Modelling – Outfall 2: Provides details of the updated thermal plume
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:85:CORMIX thermal plume modelling, as described in the following sections.
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:88:flood and ebb conditions as in Table 1) and shows the ebb plume (Run 10) to better maintain its excess
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:88:Shown in Figure 7 is the plume sensitivity to winds. The summer wind value of 4.08 m/s is a light wind
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:88:and doesn’t appear to have any influence on the plume when comparing runs 01 and 03. When a
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:88:significantly stronger wind of 15 m/s is applied (Run 16), the plume is slightly affected causing the excess
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:89:Figure 8 shows the tests addressing the plume sensitivity to the discharge port diameter. The baseline
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:89:Figure 9 shows the plume sensitivity to projection of the outfall port. Run 01 has a vertical projection
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:92:As stated in Section 2, CORMIX modelling, assessing the near-field impact of the of thermal plume has
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:104:In order to test the sensitivity of the plume discharge to wind directions, two further simulations have
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:104: differences in the distribution of the thermal plume:
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:104: When a south easterly (120°) wind is applied to the summer thermal plume discharge scenario
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:104: the effect is to reduce the eastern extent of the thermal plume. This is more pronounced in the
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:104: neap comparisons where flow speeds are lower and the along-coast extent of the plume is
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:109:the Outfall 1 site are consistently higher which may be contributing to faster dispersion of the plume as
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:109:This plot shows the along shore flow directing the plume discharge into the estuary. Plot Figure 29
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:Near-field thermal plume modelling has been undertaken using the CORMIX modelling software to
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:conditions, the likely extent of a thermal plume (of the properties modelled) would be very localised: a
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:m on the ebb. Considering a 2°C temperature excess the ebb extent of the plume increases to 140 m,
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:To examine the wider plume dispersion a 0.1°C temperature excess contour was exported from CORMIX.
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:allow the plume to stay buoyant for longer, however the excursion from the plume would be limited by
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:Sensitivity testing showed only a small influence on plume extent due to wind and seasonal variations,
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:the plume.
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:outfall plume, the neap tidal phases offer a larger plume, when compared to the spring tide, under
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:normal discharge conditions. In particular, the neap flood tide offers the largest plume extent as
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:However, it is to be noted that the CORMIX model assumes full plume development under the given
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:enough for a fully developed plume (as defined) to form. As the flows reduce, either side of the peak
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:conditions modelled, and turn with the tidal phase, further dissipation of the plume is expected before
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:Far field plume dispersion modelling has been undertaken using the Delft3D modelling software using
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:117:Temperature excess plots of the plume impact have shown a small impact of the outfall discharge on
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:124:thermal plume or contamination modelling.
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:172:Figure 82 shows the downstream temperature excess of the resultant plume during a spring (run 26)
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:172:characteristics again result in a more extensive plume, reducing the excess temperature at a slower rate
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:172:Figure 82. Spring and neap flood tide plume variations during extreme discharge events.
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:204:concentrations are diluted to below the EQS. Mixing zone plumes in CORMIX are modelled over
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:204:period of mixing when the plume reaches the water surface and spreads laterally (the surface spreading
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:204:while dilution during the surface spreading stage is more dominated by diffusion of the plume into the
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:204:zone plumes in different ways depending on the current conditions specified:
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:204: pair of ports and resolve the dimensions of the resulting three individual plumes (Figure 4-2).
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:205: resolve individual mixing plumes for each pair of outfalls, although the plumes are significantly
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:205: of each plume and for the surface spreading stage. The plumes combine and become vertically
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:205: 0.271 m/s respectively) the plumes undergo rapid lateral mixing at the point of discharge.
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:205: CORMIX represents this by combining the plumes into a single mixing zone for both the vertical
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:205:mixing plume above the outfall, the lateral distance travelled by the plume and the cross section width
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:205:of the mixing zone plume at the point when the EQS is reached. If the EQS is met in the surface
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:206:plume rising stage.
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:206: Plume Cross Section Width 1.9 0.5 1.0 0.6 0.9
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:206: Plume Cross Section Width 15
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:206: Plume Cross Section Width 15 immediately on discharge
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:206: Plume Cross Section Width 1.8 0.4 0.5 0.3 0.5
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:206: Plume Cross Section Width 1.9 0.5 1.0 0.4 0.3
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:206: Plume Cross Section Width 15 immediately on discharge
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:206: Plume Cross Section Width 15 immediately on discharge
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:206: Plume Cross Section Width 1.8 0.4 0.8 0.3 0.3
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:206:The results in Table 4-3 show that EQS values for all substances are met within the plume rising stage
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:207:scenario is 0.34 m/s and the EQS for all substances are met during the plume rising stage. Results are
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:208: Plume Cross Section Width 0.6 discharge 0.7 0.6
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:208: Plume Cross Section Width
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:208: Plume Cross Section Width
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:208: Plume Cross Section Width 0.6 discharge 0.7 0.6
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:208: Plume Cross Section Width 0.6 discharge 0.7
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:208: Plume Cross Section Width
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:208: Plume Cross Section Width
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:208: Plume Cross Section Width 0.6 discharge 0.7
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:217:plume reaches the water surface. Thermal effects are also extremely small, with the temperature of the
EN010103-002322-NZT DCO 9.36 - Nutrient Nitrogen Briefing Paper Clean Oct 2022 (D9).pdf:217:mixing plume falling below 3°C above ambient conditions within a very short distance. Surface
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:24: plumes, stacks and high levels of lighting at night-time associated with the industrial
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:26: industrial complexes and structures including stacks, chimneys and plumes. The
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:40:associated plume from the absorber stack appearing against the high ground in the distance. The
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:40:structures and plumes will be visible, viewed within a context of existing large-scale structures as part
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:41:Long distance view towards the operational PCC Site. The structures, stacks and plume associated
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:42:intervening landform and vegetation. The larger structures, stacks and plume associated with the
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:43:Medium range view towards the operational PCC Site. The structures, stacks and plume associated
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:44:The majority of the high level structures, stacks and plume associated with the absorber stack will
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:45:including stacks and plume associated with the absorber stack will be viewed against the skyline,
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:46:Medium distance views of the operational PCC Site, including stacks and plume associated with the
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:47:At opening the operational PCC Site will be visible in the view. The stacks and plume associated with
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:48:The operational PCC Site will be clearly visible in the view. The stacks and plume associated with the
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:49:intervening structures located in close proximity to the PCC Site. The stacks and plume would form
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:50:The operational PCC Site will be visible to the left of the centre of the view. The stacks and plume
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:50:a high number of industrial structures including stacks and plumes. The Proposed Development
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:51:The upper sections of the operational PCC Site at opening including stacks and plume associated
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:51: Visible Plumes
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:51: ecological receptors: 35°C and 60°C release. The average visible plume
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:51: 40% of the time reducing to approximately 4% of the time for a plume over
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:52: 115 m in length (i.e. the height of the stack). An average plume length of 1 m
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:52:17.6.18 As such the visual impact associated with visible plumes from a 35°C release
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:52:17.6.19 In addition to the potential for visible plumes to occur from the absorber stack,
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:52: there is also potential for visible plumes to occur from the mechanical draft
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:52: cooling towers (22 cooling cells). Plumes will be present for up to 85% of the
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:52: time with an average length of 15 m. Visible plumes over 100 m are only
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:52: visible plumes from existing stacks and chimneys.
EN010103-000909-NZT DCO 6.2.17 ES Vol I Chapter 17 Landscape and Visual Amenity.pdf:55: road corridors. Where views are open, the stacks and associated plumes will
EN010103-002409-NZT DCO - 9.45 Written Summary of Oral Submission for ISH6 - Oct 2022 (D11).pdf:7: Plume modelling of the outfall discharge has been undertaken and this has demonstrated that the discharged
EN010103-002636-NZT DCO 8.5 - EA SoCG - Final (signed) - Oct 2022 (D13).pdf:11: plume impacts, emissions to air and the emerging BAT
EN010103-001576-NZT DCO 9.3 - Written Summary ISH2 - May 2022.pdf:21: dispersion of the plume from the stack on top of the tower and this has been used
EN010082-000211-EN010082-5.5-Planning Statement-Final-November 2017.pdf:44: • measures to be employed in preventing or mitigating the emissions. assesses the potential for visible plumes. It concludes that visible plumes will occur rarely, less
EN010082-000012-Scoping Opinion.pdf:39: more prominent structures and plume) in the landscape and visual
EN010082-000654-TEES Final Recommendation Report and Errata.pdf:69: • Potential visibility of plumes from the stacks and cooling towers at
EN010082-000174-EN010082-6.2.3-ES Chapter 3-EIA Approach-Final-November 2017.pdf:15: Plumes: visual intrusiveness of plumes Hybrid cooling tower technology will be used which
EN010082-000174-EN010082-6.2.3-ES Chapter 3-EIA Approach-Final-November 2017.pdf:15: from cooling towers will have a much reduced visual plume than the
EN010082-000174-EN010082-6.2.3-ES Chapter 3-EIA Approach-Final-November 2017.pdf:15: original cooling tower plumes (associated with the
EN010082-000581-8.61 - Tees CCPP - Stack Diameter Sensitivity Study.pdf:3:1.4 The dispersion of the plume is driven by three principal factors:
EN010082-000581-8.61 - Tees CCPP - Stack Diameter Sensitivity Study.pdf:3: the temperature of the plume which provides the initial thermal buoyancy;
EN010082-000581-8.61 - Tees CCPP - Stack Diameter Sensitivity Study.pdf:3: the exit velocity of the plume which provides the initial momentum.
EN010082-000397-8 6 - Tees CCP - Applicant's Response to ExA's WQs - Deadline 2 - FINAL.pdf:12:Q1.1.22 Applicant Paragraph 7.120 of the ES APP-049 indicates that for visible plumes the The assessment of visible plumes is not a commonplace requirement, and Aermod does not have this model capability. ADMS was
EN010082-000397-8 6 - Tees CCP - Applicant's Response to ExA's WQs - Deadline 2 - FINAL.pdf:12: ADMS model has been used for the exercise using the same set up as the therefore used to assess visible plumes as this does have this capability.
EN010082-000397-8 6 - Tees CCP - Applicant's Response to ExA's WQs - Deadline 2 - FINAL.pdf:12: why the ADMS model was used. ADMS and Aermod are based upon the same Gaussian Plume Dispersion equations. There are some differences in the processing of
EN010082-000397-8 6 - Tees CCP - Applicant's Response to ExA's WQs - Deadline 2 - FINAL.pdf:12: terrain and buildings; however, for the plume visibility modelling, these effects do not need to be modelled and therefore there is
EN010082-000216-EN010082-5.1-Consultation Report-Final-November 2017.pdf:75: he potential for visible plumes. It concludes that visible plumes will occur rarely, less
EN010082-000216-EN010082-5.1-Consultation Report-Final-November 2017.pdf:77: assesses the potential for visible plumes. It concludes that visible plumes will occur Description and Alternatives (Ref
EN010082-000216-EN010082-5.1-Consultation Report-Final-November 2017.pdf:107: – The stacks produce minimal visible plume
EN010082-000216-EN010082-5.1-Consultation Report-Final-November 2017.pdf:107: – The cooling tower technology selected is regarded as Best Available Technology for plume abatement.
EN010082-000654-TEES Final Recommendation Report and Errata (1).pdf:69: • Potential visibility of plumes from the stacks and cooling towers at
EN010082-000350-Placeholder for ExA's Written Questions.pdf:7:Q1.1.22 Applicant Paragraph 7.120 of the ES APP-049 indicates that for visible plumes the ADMS model has been used
EN010082-000212-EN010082-5.6-Design Access Statement-Final-November 2017.pdf:19: • steam plume.
EN010082-000212-EN010082-5.6-Design Access Statement-Final-November 2017.pdf:20: (each with a emissions stack). Each single shaft power train will have a plume abated hybrid
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:21: impact on dispersion of emissions, in terms of funnelling of plumes and
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:24: drawn down to ground level. This phenomenon can bring the plume from the
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51:7.4.6 Visible Plumes
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51:7.120 The project has the potential to result in the emission of visible plumes.
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51: Normally, water vapour in the plume which is generated as a combustion
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51: product will be in vapour phase as the plume temperature decreases.
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51: may condense into droplets forming visible plumes. The potential for visible
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51: plumes has been assessed using dispersion modelling, based upon the water
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51: content of the plume. The ADMS model has been used for this exercise, using
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51:7.121 The results of the visible plume assessment are set out in Table 7.18.
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51:Table 7.18 Predicted Occurrence of Visible Plumes
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51: plume visible
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51: plume visible
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51: plumes when visible
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51: Average length of plume m 41 86 49 67 61 61
EN010082-000380-6.2.7 - Tees CCPP - ES Chapter 7 Air Quality - tracked Rev 2 with figures.pdf:51:7.122 The results show that visible plumes will occur rarely, less than 1% of the
EN010082-000517-8.43 - Tees CCPP - Written Summary of Oral Case - Env Matters ISH - FINAL - 05.07.18.pdf:8: plume downwash.
EN010082-000517-8.43 - Tees CCPP - Written Summary of Oral Case - Env Matters ISH - FINAL - 05.07.18.pdf:8: building could mean the plume would then interact with the buildings on the Site and downwash effects
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:22: impact on dispersion of emissions, in terms of funnelling of plumes and
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:24: drawn down to ground level. This phenomenon can bring the plume from the
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51:7.4.6 Visible Plumes
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51:7.120 The project has the potential to result in the emission of visible plumes.
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51: Normally, water vapour in the plume which is generated as a combustion
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51: product will be in vapour phase as the plume temperature decreases.
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51: may condense into droplets forming visible plumes. The potential for visible
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51: plumes has been assessed using dispersion modelling, based upon the water
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51: content of the plume. The ADMS model has been used for this exercise, using
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51:7.121 The results of the visible plume assessment are set out in Table 7.18.
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51:Table 7.18 Predicted Occurrence of Visible Plumes
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51: plume visible
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51: plume visible
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51: plumes when visible
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51: Average length of plume m 41 86 49 67 61 61
EN010082-000374-6.2.7 - Tees CCPP - ES Chapter 7 - Air Quality - clean Rev 2 with figures.pdf:51:7.122 The results show that visible plumes will occur rarely, less than 1% of the
EN010082-000182-EN010082-6.2.11-ES_Chapter 11-Land and Visual Amenity-Final-November 2017.pdf:6: more prominent structures and plume) in the landscape and visual buildings. The 5km study
EN010082-000182-EN010082-6.2.11-ES_Chapter 11-Land and Visual Amenity-Final-November 2017.pdf:32: • potential visibility of plumes from the stacks and cooling towers at certain
EN010082-000290-EN010082-6.2.11-ES_Chapter 11-Land and Visual Amenity-Rev 2 -January 2018.pdf:6: more prominent structures and plume) in the landscape and visual buildings. The 5km study
EN010082-000290-EN010082-6.2.11-ES_Chapter 11-Land and Visual Amenity-Rev 2 -January 2018.pdf:32: • potential visibility of plumes from the stacks and cooling towers at certain
EN010082-000378-5.6 - Tees CCPP - Design & Access Statement - tracked Rev 3.pdf:20: • steam plume.
EN010082-000378-5.6 - Tees CCPP - Design & Access Statement - tracked Rev 3.pdf:21: (each with a emissions stack). Each single shaft power train will have a plume abated hybrid
EN010082-000381-6.2.11 - Tees CCPP - ES Chapter 11 LVIA - tracked Rev 3 with figures.pdf:6: more prominent structures and plume) in the landscape and visual buildings. The 5km study
EN010082-000381-6.2.11 - Tees CCPP - ES Chapter 11 LVIA - tracked Rev 3 with figures.pdf:31: • potential visibility of plumes from the stacks and cooling towers at certain
EN010082-000375-6.2.11 - Tees CCPP - ES Chapter 11 - LVIA - clean Rev 3 with figures.pdf:6: more prominent structures and plume) in the landscape and visual buildings. The 5km study
EN010082-000375-6.2.11 - Tees CCPP - ES Chapter 11 - LVIA - clean Rev 3 with figures.pdf:31: • potential visibility of plumes from the stacks and cooling towers at certain
EN010082-000215-EN010082-5.9-Statutory Nuisance Statement-Final-November 2017.pdf:3:3.3 VISIBLE PLUMES 6
EN010082-000215-EN010082-5.9-Statutory Nuisance Statement-Final-November 2017.pdf:8: quality (construction dust and operational emissions), noise, visible plumes
EN010082-000215-EN010082-5.9-Statutory Nuisance Statement-Final-November 2017.pdf:11:3.3 VISIBLE PLUMES
EN010082-000215-EN010082-5.9-Statutory Nuisance Statement-Final-November 2017.pdf:11:1.31 The project has the potential to result in the emission of visible plumes during
EN010082-000215-EN010082-5.9-Statutory Nuisance Statement-Final-November 2017.pdf:11: operation. Normally, water vapour in the plume which is generated as a
EN010082-000215-EN010082-5.9-Statutory Nuisance Statement-Final-November 2017.pdf:12: combustion product will be in vapour phase as the plume temperature
EN010082-000215-EN010082-5.9-Statutory Nuisance Statement-Final-November 2017.pdf:12: high water may condense into droplets forming visible plumes. The potential
EN010082-000215-EN010082-5.9-Statutory Nuisance Statement-Final-November 2017.pdf:12: for visible plumes has been assessed using dispersion modelling, based upon
EN010082-000215-EN010082-5.9-Statutory Nuisance Statement-Final-November 2017.pdf:12: the water content of the plume. The ADMS model has been used for this
EN010082-000215-EN010082-5.9-Statutory Nuisance Statement-Final-November 2017.pdf:12: the Environmental Statement. The results show that visible plumes will occur
EN010082-000215-EN010082-5.9-Statutory Nuisance Statement-Final-November 2017.pdf:13: significant effects are air quality, noise, visible plumes and lighting. However,
EN010082-000192-EN010082-6.3.2-ES Annex B-Scoping Opinion-Final-November 2017.pdf:41: more prominent structures and plume) in the landscape and visual
EN010082-000654-TEES Final Recommendation Report and Errata (2).pdf:69: • Potential visibility of plumes from the stacks and cooling towers at
EN010082-000372-5.6 - Tees CCPP - Design & Access Statement - clean Rev 3.pdf:20: • steam plume.
EN010082-000372-5.6 - Tees CCPP - Design & Access Statement - clean Rev 3.pdf:21: (each with a emissions stack). Each single shaft power train will have a plume abated hybrid
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:22: impact on dispersion of emissions, in terms of funnelling of plumes and
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:24: drawn down to ground level. This phenomenon can bring the plume from the
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51:7.4.6 Visible Plumes
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51:7.120 The project has the potential to result in the emission of visible plumes.
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51: Normally, water vapour in the plume which is generated as a combustion
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51: product will be in vapour phase as the plume temperature decreases.
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51: may condense into droplets forming visible plumes. The potential for visible
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51: plumes has been assessed using dispersion modelling, based upon the water
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51: content of the plume. The ADMS model has been used for this exercise, using
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51:7.121 The results of the visible plume assessment are set out in Table 7.18.
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51:Table 7.18 Predicted Occurrence of Visible Plumes
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51: plume visible
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51: plume visible
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51: plumes when visible
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51: Average length of plume m 41 86 49 67 61 61
EN010082-000178-EN010082-6.2.7-ES Chapter 7-Air Quality-Final-November 2017.pdf:51:7.122 The results show that visible plumes will occur rarely, less than 1% of the
EN010082-000654-TEES Final Recommendation Report and Errata (3).pdf:69: • Potential visibility of plumes from the stacks and cooling towers at
EN010082-000510-CONSULTATION REPORT FOR NON-MATERIAL CHANGE.pdf:26: Air Quality effects are most prominent where the plume is substantially
EN010082-000510-CONSULTATION REPORT FOR NON-MATERIAL CHANGE.pdf:27: (IRCE), Doc Ref: 8.3, which replicates building height information from the present). In this case, the plume rise (due to plume momentum
EN010082-000510-CONSULTATION REPORT FOR NON-MATERIAL CHANGE.pdf:27: Preliminary Environmental Impact Report (PEIR) and Environmental and buoyancy) is sufficient to lift the plume clear of the
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:64: between sediment plumes created during capital dredging (with potential effects on food
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:64: between sediment plumes created during capital dredging (with potential effects on prey
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:78: phase noise disturbance, creation of a sediment plume during capital dredging and changes to the
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:78: disturbance, creation of a sediment plume during capital dredging and changes to the hydrodynamic
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:79: sediment plume during construction and changes to the hydrodynamic and sedimentary regime
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:87: spatial extent of sediment plume.
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:88: activity. The plume dispersion modelling predicted no average increase in suspended sediment
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:100: clarity, with a plume of sediment being dispersed along the axis of the navigation channel. The
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:100:10.4.9 The sediment plume within the Tees is likely to affect birds that feed on small fish in the water column,
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:100: with some redistribution in feeding activity likely to occur. The sediment plume modelling has predicted
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:100: the sediment plume as currently predicted by the EIA studies undertaken to date.
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:127:11.4.16 The potential for an interaction between sediment plumes that are predicted to be generated by capital
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:128: of the plume. The effect is, therefore, additive rather than cumulative.
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:128: a combined plume (in the zone of interaction) is not likely to result is a different behavioural response in
TR030002-000571-Doc 7.3 Appendix 3 - Habitats Regulation Assessment Sept 2014.pdf:128: plume from capital dredging. It should be noted that it is highly unlikely that maintenance dredging
TR030002-000801-Document 6.8B - Governance Tracker.pdf:8:14 The main mitigation measure to limit sediment plume is selection of the dredge method. Contaminated Deemed Marine Licence (Schedule 5)
TR030002-000801-Document 6.8B - Governance Tracker.pdf:8: the water column. Other measures to limit the sediment plume generation comprise limiting the swing
TR030002-000470-Section 6 App 6.4 CEMP.pdf:19:12 The main mitigation measure to limit sediment plume is selection of the dredge method. Contaminated sediments are to be dredged using an
TR030002-000470-Section 6 App 6.4 CEMP.pdf:19: the sediment plume generation comprise limiting the swing of the backhoe over water, thereby reducing the time when sediment can leak out of
TR030002-000503-Section 20 App 20.3 Visual assessment.pdf:7: vapour plumes drawing the eye. to the view. phase
TR030002-000503-Section 20 App 20.3 Visual assessment.pdf:8: vapour plumes drawing the eye. and would form a minor change to the phase:
TR030002-000459-ES Section 24 References.pdf:2:CIRIA (2000). Scoping the assessment of sediment plumes from dredging.
TR030002-000463-Section 4 App 4.2 Scoping Opinion.pdf:83:16. TELEMAC-3D and SEDPLUME are suitable for the modelling proposed but the ES
TR030002-000675-Doc 6.3 Habitats Regulations Assessment_2 of 2.pdf:12: extent of sediment plume. Predicted mean concentration increases of suspended sediment outside the
TR030002-000675-Doc 6.3 Habitats Regulations Assessment_2 of 2.pdf:13: release of contaminated material during the capital dredging. Hence the results of the sediment plume
TR030002-000675-Doc 6.3 Habitats Regulations Assessment_2 of 2.pdf:13: dredging activity. The plume dispersion modelling predicted no average increase in suspended
TR030002-000675-Doc 6.3 Habitats Regulations Assessment_2 of 2.pdf:23: clarity, with a plume of sediment being dispersed along the axis of the navigation channel. The
TR030002-000675-Doc 6.3 Habitats Regulations Assessment_2 of 2.pdf:23:10.4.10 The sediment plume within the Tees is likely to affect birds that feed on small fish in the water column,
TR030002-000675-Doc 6.3 Habitats Regulations Assessment_2 of 2.pdf:23: with some redistribution in feeding activity likely to occur. The sediment plume modelling has predicted
TR030002-000675-Doc 6.3 Habitats Regulations Assessment_2 of 2.pdf:30:11.3.9 The potential for an interaction between sediment plumes that are predicted to be generated by capital
TR030002-000675-Doc 6.3 Habitats Regulations Assessment_2 of 2.pdf:30: of the plume for the Harbour facilities. The effect, therefore, would be additive rather than cumulative.
TR030002-000675-Doc 6.3 Habitats Regulations Assessment_2 of 2.pdf:31: a combined plume (in the zone of interaction) is not likely to result in a different behavioural response in
TR030002-000675-Doc 6.3 Habitats Regulations Assessment_2 of 2.pdf:31: arising from maintenance dredging to interact with a sediment plume from capital dredging. It should
TR030002-000464-Section 4 App 4.3 WFD compliance assessment.pdf:10: sediment plumes created by capital dredging and the offshore disposal of dredged
TR030002-000464-Section 4 App 4.3 WFD compliance assessment.pdf:26: only), structure and and plume effects from the disposal are not anticipated to enter the water body.
TR030002-000464-Section 4 App 4.3 WFD compliance assessment.pdf:28: The dredging plume is not predicted to enter into this water body.
TR030002-000464-Section 4 App 4.3 WFD compliance assessment.pdf:28: The dredging plume is not predicted to enter into this water body.
TR030002-000464-Section 4 App 4.3 WFD compliance assessment.pdf:36: plume does not reached Seal Sands (see Section 5 of the ES) and therefore no impacts on the
TR030002-000464-Section 4 App 4.3 WFD compliance assessment.pdf:37:4.1.19 Impacts on protected areas are not anticipated in relation to designated bathing waters as the plume is
TR030002-000464-Section 4 App 4.3 WFD compliance assessment.pdf:37: plume will not extend onto Seal Sands and therefore impacts on nutrient concentrations within Seal
TR030002-000464-Section 4 App 4.3 WFD compliance assessment.pdf:37: during dredging. As discussed with Section 11 of the ES, sediment plumes induced by dredging are
TR030002-000464-Section 4 App 4.3 WFD compliance assessment.pdf:41: geological material which does not carry a corresponding impact on plumes associated with
TR030002-000464-Section 4 App 4.3 WFD compliance assessment.pdf:42: (EQS) failures. plumes associated with
TR030002-000464-Section 4 App 4.3 WFD compliance assessment.pdf:45:Potential The potential release of suspended solids In general, sediment plumes induced by dredging are Given that the potential changes are unlikely to be
TR030002-000710-York Potash Limited (Document 6.8A).pdf:9:14 The main mitigation measure to limit sediment plume is selection of the dredge method. Contaminated Deemed Marine Licence (Schedule 5)
TR030002-000710-York Potash Limited (Document 6.8A).pdf:9: the water column. Other measures to limit the sediment plume generation comprise limiting the swing
TR030002-000453-ES Section 18 Infrastructure.pdf:15:18.5.17 The results of the sediment plume dispersion modelling for a backhoe dredger and CSD, presented and
TR030002-000453-ES Section 18 Infrastructure.pdf:16:18.5.18 The results of the sediment plume dispersion modelling undertaken for the TSHD show that mean
TR030002-000453-ES Section 18 Infrastructure.pdf:16: outlined within Section 7.5 (with regard to minimising sediment plume dispersion during dredging)
TR030002-000547-Doc 6.6 App 22.2 Representative viewpoint assessment.pdf:3:chimney stacks and vapour plumes are visible at Teesside.
TR030002-000547-Doc 6.6 App 22.2 Representative viewpoint assessment.pdf:4:dryer stack becomes slightly more noticeable when the vapour plume is being emitted) and have negligible
TR030002-000547-Doc 6.6 App 22.2 Representative viewpoint assessment.pdf:4:Boulby Mine Top of dryer stack and associate plume distantly visible against the sea at a
TR030002-000547-Doc 6.6 App 22.2 Representative viewpoint assessment.pdf:5:Boulby Mine The top of the dryer stack and plume are only just visible to the south east,
TR030002-000547-Doc 6.6 App 22.2 Representative viewpoint assessment.pdf:8:dryer stack, along with associate vapour plume, is visible above the undulating land/ sea horizon in the
TR030002-000547-Doc 6.6 App 22.2 Representative viewpoint assessment.pdf:8:dryer stack edge landform to the north, very small scale feature within the view, plume
TR030002-000547-Doc 6.6 App 22.2 Representative viewpoint assessment.pdf:14:(18km) discernible within the view although the plume increase visibility slightly.
TR030002-000446-ES Section 11 Fisheries and fishing activity.pdf:25: behavioural effects. In general, sediment plumes induced by dredging are considered to pose only a
TR030002-000446-ES Section 11 Fisheries and fishing activity.pdf:26: backhoe dredging. Other measures that limit plume generation comprise limiting the swing of the
TR030002-000446-ES Section 11 Fisheries and fishing activity.pdf:47: over water. Reduction in sediment plume gen
TR030002-000564-Doc 6.8 Governance Tracker.pdf:9:12 The main mitigation measure to limit sediment plume is selection of the dredge method. Contaminated MMO Licence Sch 4
TR030002-000564-Doc 6.8 Governance Tracker.pdf:9: the water column. Other measures to limit the sediment plume generation comprise limiting the swing
TR030002-000722-York Potash Limited 4.pdf:7: modelling of sediment plume released from construction activities;
TR030002-000722-York Potash Limited 4.pdf:11: reduction of sediment plumes during backhoe dredging can be achieved by using an
TR030002-000738-York Potash Limited 3.pdf:8: modelling of sediment plume released from construction activities;
TR030002-000738-York Potash Limited 3.pdf:10: reduction of sediment plumes during backhoe dredging can be achieved by using an
TR030002-000673-Doc 6.1 Consultation Statement Appendices - 22 to 31.pdf:41: backhoe dredger. The MMO would expect the full details of the sediment plume modelling to be included in the final ES i.e.
TR030002-000492-Section 13 App 13.1 Air quality assessment methodology.pdf:43: dispersion model based on the Gaussian theory of plume dispersion and was developed by the United
TR030002-000410-ExA First Round Questions.pdf:21:Sediment plume modelling data
TR030002-000410-ExA First Round Questions.pdf:21:The marine sediment and water quality assessment uses the sediment plume
TR030002-000410-ExA First Round Questions.pdf:21:concerns on the sediment plume modelling simulations and assessment of
TR030002-000455-ES Section 20 Landscape and visual environment.pdf:9: flare stacks and plumes of steam; and,
TR030002-000455-ES Section 20 Landscape and visual environment.pdf:14: white plumes from the SSI Steel Works form a prominent feature against the sky.
TR030002-000455-ES Section 20 Landscape and visual environment.pdf:15: associated buildings, storage areas, flare stacks and vapour plumes.
TR030002-000455-ES Section 20 Landscape and visual environment.pdf:24: plumes and emissions being visible in foreground, midground, background and skyline views in most
TR030002-000711-Applicants Response to First Questions.pdf:65:HWF 1.6 Applicant Sediment plume modelling data
TR030002-000711-Applicants Response to First Questions.pdf:65: Management assessment uses the sediment plume an estuary-wide sediment regime model using the
TR030002-000711-Applicants Response to First Questions.pdf:65: assessment of impacts on marine water sediment plume model SEDPLUME (originated by HR
TR030002-000711-Applicants Response to First Questions.pdf:66: sediment regime models. The applicant is SEDPLUME is used to predict the dispersion of sediment
TR030002-000711-Applicants Response to First Questions.pdf:66: information and provide their comments SEDPLUME model itself. The model accuracy relies
TR030002-000711-Applicants Response to First Questions.pdf:66: concerns on the sediment plume sediment release source term which is included within the
TR030002-000711-Applicants Response to First Questions.pdf:66: impacts on the marine water quality. operation. To ensure that the plume simulation presents
TR030002-000711-Applicants Response to First Questions.pdf:105: required for Phase 2 of the development? spatial extent of any sediment plume created by capital
TR030002-000711-Applicants Response to First Questions.pdf:129: Organisation Compliance Assessment as part of their plume dispersion modelling. Please see our response to
TR030002-000497-Section 15 App 15.4 Additional settings assessment report.pdf:11: which are manifest as coalescing plumes of white, grey and black vapour. These
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:26: production of a visible plume.
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:44: activity is likely to cause increased turbidity in the water column in the form of a ‘plume’
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:44: within this plume would be dispersed by tidal action and ultimately become deposited on
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:44: of any related plume would be negligible compared with the dredging-related plume.
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:45: SEDPLUME model will be used to demonstrate the fate of fine materials released into
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:46: Two sets of flow results will be used to drive the SEDPLUME model. The low
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:46: extent of the sediment plume and the high freshwater flow, neap tide conditions will be
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:46: the plume will be presented as figures to assist in interpretation of the results.
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:55: on the designated bathing waters associated with the dredging plume.
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:57: The main form of mitigation to limit sediment plume generation due to dredging is
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:62:vicinity of the dredging, dispersion and dilution of the sediment plume would occur and
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:63: section of the EIA, particularly the prediction of sediment plume dispersion during capital
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:74: The main mitigation measure to limit sediment plume generation due to dredging is the
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:105:Hydrodynamic • Creation of a sediment plume during dredging and piling works. • Use of TELEMAC-3D flow model to
TR030002-000462-Section 4 App 4.1 Environmental Scoping Report.pdf:105: proposed quay structure and deepened berth pocket and • Use of SEDPLUME model to dem
TR030002-000444-ES Section 9 Marine and coastal ornithology.pdf:23: into the water column, causing a sediment plume which could potentially affect habitats used by
TR030002-000444-ES Section 9 Marine and coastal ornithology.pdf:24: for some species of waterbirds. On the basis of the sediment plume dispersion modelling, no impact is
TR030002-000444-ES Section 9 Marine and coastal ornithology.pdf:40:9.9.4 Potential plume effects on the feeding resource and disturbance during the construction phase would
TR030002-000444-ES Section 9 Marine and coastal ornithology.pdf:42: Reduction of sediment plumes during backhoe dredgin
TR030002-000443-ES Section 8 Marine ecology.pdf:49:8.5.19 In general, sediment plumes induced by dredging are considered to pose only a limited risk to water
TR030002-000443-ES Section 8 Marine ecology.pdf:49:8.5.21 The sediment plume dispersion plots presented in Section 5.5 illustrate that the footprint of effect on
TR030002-000443-ES Section 8 Marine ecology.pdf:50:8.5.24 The results of the sediment plume modelling undertaken specifically for the proposed scheme are
TR030002-000443-ES Section 8 Marine ecology.pdf:50: intertidal areas. Based on the sediment plume modelling results, no significant indirect impacts on
TR030002-000443-ES Section 8 Marine ecology.pdf:61:suspended during Low Low Negligible Reduction of sediment plumes during backhoe dredgin
TR030002-000561-Doc 6.7 Environmental Statement Non Technical Summary_2 of 2.pdf:16:2.5.7 The results of sediment plume modelling undertaken for the proposed scheme show that an average
TR030002-000561-Doc 6.7 Environmental Statement Non Technical Summary_2 of 2.pdf:24: plumes and emissions being visible in foreground, midground, background and in skyline views in most
TR030002-000561-Doc 6.7 Environmental Statement Non Technical Summary_2 of 2.pdf:32: sediment plume from more than one projects overlap. However, the cumulative impact on fish
TR030002-000674-Doc 6.3 Habitats Regulations Assessment_1 of 2.pdf:81: sediment plumes created during capital dredging
TR030002-000674-Doc 6.3 Habitats Regulations Assessment_1 of 2.pdf:81: sediment plumes created during capital dredging
TR030002-000674-Doc 6.3 Habitats Regulations Assessment_1 of 2.pdf:86: construction phase noise disturbance, creation of a sediment plume during capital dredging and
TR030002-000674-Doc 6.3 Habitats Regulations Assessment_1 of 2.pdf:86: disturbance, creation of a sediment plume during capital dredging and changes to the
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:24: production of a visible plume.
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:42: activity is likely to cause increased turbidity in the water column in the form of a ‘plume’
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:42: within this plume would be dispersed by tidal action and ultimately become deposited on
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:42: of any related plume would be negligible compared with the dredging-related plume.
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:43: SEDPLUME model will be used to demonstrate the fate of fine materials released into
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:44: Two sets of flow results will be used to drive the SEDPLUME model. The low
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:44: extent of the sediment plume and the high freshwater flow, neap tide conditions will be
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:44: the plume will be presented as figures to assist in interpretation of the results.
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:53: on the designated bathing waters associated with the dredging plume.
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:55: The main form of mitigation to limit sediment plume generation due to dredging is
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:60:vicinity of the dredging, dispersion and dilution of the sediment plume would occur and
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:61: section of the EIA, particularly the prediction of sediment plume dispersion during capital
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:72: The main mitigation measure to limit sediment plume generation due to dredging is the
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:103:Hydrodynamic • Creation of a sediment plume during dredging and piling works. • Use of TELEMAC-3D flow model to
TR030002-000074-131202_TR030002_York Potash Harbour Facilities_Scoping Report.pdf:103: proposed quay structure and deepened berth pocket and • Use of SEDPLUME model to dem
TR030002-000072-140113_TR030002_York Potash Harbour Facilities_Scoping Opinion Report.pdf:81:16. TELEMAC-3D and SEDPLUME are suitable for the modelling proposed but the ES
TR030002-000457-ES Section 22 Offshore disposal of dredged material.pdf:2:22.2.2 The in-situ sediment with the highest proportion of fine sediment used in the dredging plume
TR030002-000457-ES Section 22 Offshore disposal of dredged material.pdf:2: descends. This dynamic plume phase restricts the release of fine sediment into the water column to 5-
TR030002-000457-ES Section 22 Offshore disposal of dredged material.pdf:2: 10% losses of fine sediment from the dynamic plume was assumed.
TR030002-000457-ES Section 22 Offshore disposal of dredged material.pdf:2: the extent of the fine sediment plume expected to arise from disposal operations in the offshore area, a
TR030002-000457-ES Section 22 Offshore disposal of dredged material.pdf:2: tracking model, SEDPLUME-RW(3D). A source term of 60kg/s of fine sediment was included in the
TR030002-000457-ES Section 22 Offshore disposal of dredged material.pdf:2: by the simulation. Plotting the maximum plume concentration shows the largest concentration
TR030002-000457-ES Section 22 Offshore disposal of dredged material.pdf:2: plume (i.e. the maximum concentration shown would disperse).
TR030002-000457-ES Section 22 Offshore disposal of dredged material.pdf:3: the dynamic plume phase of the disposal operation. Deposition is predicted to be entirely within the
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:8: which effects are predicted to occur (e.g. sediment plumes generated during capital dredging and
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:20: sediments and release them into the water column as a plume. This would increase the suspended
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:21: plume modelling was undertaken to predict the effect of dredging due to all potential dredge methods
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:21:7.5.7 The sediment plume simulations for the backhoe dredger predict that an area of elevated suspended
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:21: dredger, with no wider effects within the estuary. The predicted sediment plume for the backhoe
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:21:7.5.9 The sediment plume simulation undertaken for the CSD (see Figure 7-4) indicates an area of elevated
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:24:7.5.11 The sediment plume simulations for the TSHD (see Figure 7-5) predict that an area of elevated
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:24: sediment plume is minimised as far as practicable.
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:24:7.5.13 The sediment plume modelling simulations (presented and discussed within Section 5) have shown
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:25:7.5.14 In general, sediment plumes induced by dredging are considered to pose only a limited risk to water
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:25: is minimised during dredging. The main mitigation measure to limit sediment plume is selection of the
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:26: dredging. Other measures that limit plume generation comprise limiting the swing of the backhoe over
TR030002-000442-ES Section 7 Marine sediment and water quality.pdf:32: Reduction of sediment plumes during backhoe dr
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:5:The sediment plumes resultant from the operation of cutter suction and trailer suction hopper
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:6:similar after the development. The centre of the plume of suspended particles is predicted to be
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:6:the plume in the upstream turning circle is predicted for larger tide ranges particularly under
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:14: (mud) sediment. Section 5 describes the studies of the dispersion of sediment plume
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:45: The HR Wallingford developed model SEDPLUME-RW(3D) was used to simulate the
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:45: SEDPLUME-RW(3D) uses tidal currents to determine the advection of material within
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:45: caused by sediment plumes.
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:45: In the Estuary the SEDPLUME model is driven by flows from the TELEMAC-3D
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:46: Using SEDPLUME-RW(3D) to disperse sediment from dredging operations there are a
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:46: various parameters which would act as input to the sediment plume study as well as
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:52: the plume dispersion modelling are shown in Figure 2.4.
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:52: On the spring tide, low flow condition (Figure 5.14), the suspended solids plume leaves
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:52: plume extends upstream of Dabholm Gut, beyond the landward limit of the model’s
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:53: tide under low flow conditions (Figures 5.20 to 5.22), the extent of the plume of
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:53: that the high suspended particle concentrations in the core of the plume are close to the
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:53: The HR Wallingford dispersion model SEDPLUME-RW(3D) was used to carry out
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:53: plume simulations for suspended particles released into Dabholm Gut, within the area of
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:53: and proposed port layouts and dredged depths. The plume model was driven by the
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:54: the plume of suspended particles tends to be closer to the east bank of the River Tees
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:59: Plume models have been applied to study the fate of material released by the capital
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:59: The sediment plumes resultant from the operation of cutter suction and trailer suction
TR030002-000466-Section 5 App 5.2 Model calibration and validation.pdf:60: to be of the whole similar after the development. The core of the plume of suspended
TR030002-000437-ES Section 3 Project description_1 of 2.pdf:34: the spatial extent of the sediment plume).
TR030002-000701-Environment Agency.pdf:12: modelling of sediment plume released from construction activities;
TR030002-000701-Environment Agency.pdf:16: reduction of sediment plumes during backhoe dredging can be achieved by using an
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:10: sediment plume dispersion and deposition onto the seabed during capital dredging
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:251: of sediment plume released from construction activities.
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:252: which would create a plume of sediment in the water column which would disperse according to
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:253:25.4.2 The extent of sediment plume created by capital dredging is heavily dependent on the dredging plant
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:253: maximum potential spatial extent of sediment plume generation and deposition footprint has been
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:253: plume dispersion and deposition onto the seabed during capital dredging
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:253: predicted in close proximity to the dredger, with dispersion of the plume resulting in a significantly
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:269:26.4.1 Given that the generation of a sediment plume is a construction phase effect (i.e. would occur during
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:269: represent sediment plume dispersion under specific tidal conditions (to enable a realistic worse case to
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:269: programmes of capital dredging would coincide to result in a scenario where sediment plumes combine
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:269:26.4.2 Analysis of the results presented in Table 25-3 indicates that the sediment plumes arising from
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:269: Harbour facilities alone but within the same plume spatial extent (i.e. the spatial extent of the sediment
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:269: plume predicted for the Harbour facilities would not be altered by interaction with the effects of other
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:269: projects). It should be noted that the sediment plume predicted due to the NGCT encompasses, and
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:269: extends beyond, the area of the plume predicted for the Harbour facilities. The impact is, therefore,
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:270: maintenance dredging to interact with a sediment plume from capital dredging.
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:272: plume during capital dredging
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:272: populations is also informed by the sediment plume dispersion studies undertaken for the Harbour
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:274: Effect on fish populations due to creation of a sediment plume during capital dredging
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:274:27.4.8 As discussed in Section 27, there is the potential for the sediment plumes to coincide resulting in an
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:274: zone of increased suspended sediment concentration. However, the effect of a combined plume (in the
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:279: due to creation of a sediment plume during capital dredging) given that waterbirds potentially affected
TR030002-000507-Doc 6.6 Environmental Statement_CIA.pdf:279: the effect of a combined plume (in the zone of interaction) is not likely to result in a different behavioural
TR030002-000440-ES Section 5 Hydrodynamic and sedimentary regime.pdf:3:TELEMAC-3D and SEDPLUME are suitable for the modelling proposed but the ES must include
TR030002-000440-ES Section 5 Hydrodynamic and sedimentary regime.pdf:4:The MMO would expect full details of sediment plume modelling to be included in the ES i.e.
TR030002-000440-ES Section 5 Hydrodynamic and sedimentary regime.pdf:6: modelling, sediment transport, bed change modelling and modelling of sediment plume released from
TR030002-000440-ES Section 5 Hydrodynamic and sedimentary regime.pdf:11:5.5.4 Sediment plume modelling tests have been carried out for the proposed scheme to predict the effects
TR030002-000440-ES Section 5 Hydrodynamic and sedimentary regime.pdf:11: flow, spring tide flow simulation was used to demonstrate the maximum extent of the sediment plume
TR030002-000440-ES Section 5 Hydrodynamic and sedimentary regime.pdf:11: tide conditions. The findings of the sediment plume modelling are discussed in greater detail below.
NGCT_Final_ES at KK with figs.pdf:6: 6.4.6 Plume studies of Dabholm Gut outflow 198
NGCT_Final_ES at KK with figs.pdf:51: • Assess impact of dredge plume and dewatering discharge on interest features.
NGCT_Final_ES at KK with figs.pdf:60: undertaking modelling of the dispersion of the sediment plume. The potential effects
NGCT_Final_ES at KK with figs.pdf:103: dispersion of sediment plumes during dredging). Further details on the parameters
NGCT_Final_ES at KK with figs.pdf:103: used in the sediment plume simulations are provided in Section 6.3.1.
NGCT_Final_ES at KK with figs.pdf:195: the studies on the dispersion of the sediment plume arising during dredging, as
NGCT_Final_ES at KK with figs.pdf:195: less instantaneous release of solids. Therefore, sediment plume studies were
NGCT_Final_ES at KK with figs.pdf:196: remain in suspension, forming a sediment plume. The plume from the overspill
NGCT_Final_ES at KK with figs.pdf:196: plume simulations.
NGCT_Final_ES at KK with figs.pdf:196: plumes of suspended fine sediment. Importantly the TSHD will result in a
NGCT_Final_ES at KK with figs.pdf:196: 7. The HR Wallingford developed model SEDPLUME-RW(3D) was used to
NGCT_Final_ES at KK with figs.pdf:196: within the Tees Estuary. SEDPLUME-RW(3D) used tidal currents computed by
NGCT_Final_ES at KK with figs.pdf:196: 8. Parameters for the sediment plume simulations for the CSD were established
NGCT_Final_ES at KK with figs.pdf:197: 9. Parameters for the sediment plume simulations for the TSHD were established,
NGCT_Final_ES at KK with figs.pdf:197: 10. For the EIA investigations the SEDPLUME-RW(3D) model was used to simulate
NGCT_Final_ES at KK with figs.pdf:197: because the sediment enters the water firstly in a dynamic plume phase (i.e. not
NGCT_Final_ES at KK with figs.pdf:197: sediment mixes with the water it behaves as a passive plume that is transported
NGCT_Final_ES at KK with figs.pdf:197: simulations assume that by the passive plume phase occurs at about 1m above
NGCT_Final_ES at KK with figs.pdf:203: approximate 1km2 of Seal Sands. The SEDPLUME model assumes that the
NGCT_Final_ES at KK with figs.pdf:227:6.4.6 Plume studies of Dabholm Gut outflow
NGCT_Final_ES at KK with figs.pdf:227: SEDPLUME-RW(3D). It should be noted that, as a consequence of the
NGCT_Final_ES at KK with figs.pdf:227: that following the proposed development the core of the plume of suspended
NGCT_Final_ES at KK with figs.pdf:254: described in Section 6.3. Two types of dredger were considered in the plume
NGCT_Final_ES at KK with figs.pdf:254: 5. The plume dispersion studies predict that, during the dredging of sand in the
NGCT_Final_ES at KK with figs.pdf:294: sediment plume spreads further afield (along the tidal axis) compared to
NGCT_Final_ES at KK with figs.pdf:299: 2. In general, sediment plumes induced by dredging are considered to pose only a
NGCT_Final_ES at KK with figs.pdf:370: 5. The cross section of the estuary affected by the plume arising from the proposed
NGCT_Final_ES at KK with figs.pdf:538:CIRIA (2000) Scoping the assessment of sediment plumes from dredging. CIRIA
IBPB8270R001F01_EIA REPORT(2).pdf:13:plumes during dredging), particularly as the use of BD typically results in lower environmental impact relative
IBPB8270R001F01_EIA REPORT(2).pdf:57: SEDPLUME-RW(3D) numerical modelling. Post construction effects were specifically assessed
IBPB8270R001F01_EIA REPORT(2).pdf:57: modelling of sediment plume released from construction activities.
IBPB8270R001F01_EIA REPORT(2).pdf:59:required) will generate a plume of sediment in the water column. The simulated dredge locations and the
IBPB8270R001F01_EIA REPORT(2).pdf:67:Due to the similarity of the mid to far-field effects of a plume created by the CSD dredging in the upper
IBPB8270R001F01_EIA REPORT(2).pdf:76:are predicted to occur (e.g. sediment plumes generated during capital dredging and effects on tidal currents
IBPB8270R001F01_EIA REPORT(2).pdf:91:suspension of sediments and release them into the water column as a plume. This would increase the TSS
IBPB8270R001F01_EIA REPORT(2).pdf:91:SSC are predicted to occur within the immediate vicinity of the dredger, but the sediment plume spreads
IBPB8270R001F01_EIA REPORT(2).pdf:92:types of dredger were considered in the plume dispersion studies, namely a CSD dredging mudstone (which
IBPB8270R001F01_EIA REPORT(2).pdf:93:The plume dispersion studies predict that, during the dredging of sand in the lower channel using a TSHD,
IBPB8270R001F01_EIA REPORT(2).pdf:93:The main mitigation measure to limit sediment plume is selection of the dredging method. As noted above,
IBPB8270R001F01_EIA REPORT(2).pdf:107:hydrodynamic and sedimentary plume modelling undertaken. This section excludes consideration of
IBPB8270R001F01_EIA REPORT(2).pdf:128:In general, sediment plumes induced by dredging are considered to pose only a limited risk to water quality
IBPB8270R001F01_EIA REPORT(2).pdf:128:background) are predicted in the immediate vicinity of the dredger. Sediment plume modelling predicts that
IBPB8270R001F01_EIA REPORT(2).pdf:156:of sediment into the water column, causing a sediment plume that could potentially affect habitats used by
IBPB8270R001F01_EIA REPORT(2).pdf:156:estuary. The modelled sediment dispersion plume from the proposed NGCT dredge does not interact with
IBPB8270R001F01_EIA REPORT(2).pdf:158:plume, the magnitude of the potential effect on feeding birds is predicted to be medium. Based on a receptor
IBPB8270R001F01_EIA REPORT(2).pdf:159:and impact of the dredged plume, as any plume generated by operations has been predicted (by HR
IBPB8270R001F01_EIA REPORT(2).pdf:159:the other side. This will allow time for the plume to disperse before operations are moved to a different
IBPB8270R001F01_EIA REPORT(2).pdf:159:Mitigation of the plume effects by reducing the size of the dredger, and thus reducing the rate of overflow,
IBPB8270R001F01_EIA REPORT(2).pdf:159:barge will be located either on the eastern or western side of the estuary. As with the TSHD, the plume
IBPB8270R001F01_EIA REPORT(2).pdf:169:occur (e.g. sediment plumes generated during capital dredging and effects on tidal currents during
IBPB8270R001F01_EIA REPORT(2).pdf:187:variation, in the immediate vicinity of the dredger (see Section 6). Sediment plume modelling has however
IBPB8270R001F01_EIA REPORT(2).pdf:187:The cross section of the estuary affected by the plume arising from the proposed dredging is particularly
IBPB8270R001F01_EIA REPORT(2).pdf:188: river. This is to reduce both the extent and impact of the dredged plume, as any plume generated
IBPB8270R001F01_EIA REPORT(2).pdf:188:Mitigation of the plume effects by reducing the size of the TSHD, and thus reducing the rate of overflow, is
IBPB8270R001F01_EIA REPORT(2).pdf:188:implementation of this measure will result in the plume from the barge loading operations remaining on one
IBPB8270R001F01_EIA REPORT(2).pdf:188:to the findings of the sediment plume modelling reporting in Section 6 (which illustrate that the sediment
IBPB8270R001F01_EIA REPORT(2).pdf:188:plume is predicted to remain within the estuary), results in a conclusion of no impact to fish spawning
IBPB8270R001F01_EIA REPORT(2).pdf:189:In general, sediment plumes induced by dredging are considered to pose only a limited risk to water quality
IBPB8270R001F01_EIA REPORT(2).pdf:189:The cross section of the estuary affected by the plume arising from the proposed dredging is particularly
IBPB8270R001F01_EIA REPORT(2).pdf:190:and clay, and up to 33 weeks for mudstone), in addition to the relatively localised nature of the plume (in
IBPB8270R001F01_EIA REPORT(2).pdf:226:Sediment plume modelling predicts that SSC would not increase above background concentrations by more
IBPB8270R001F01_EIA REPORT(2).pdf:226:The controls outlined in Section 7 (with regard to minimising sediment plume dispersion during dredging)
IBPB8270R001F01_EIA REPORT(2).pdf:259: influencing the same area as affected by the sediment plume); and,
IBPB8270R001F01_EIA REPORT(2).pdf:260:extent of the dredging and disposal plumes.
IBPB8270R001F01_EIA REPORT(2).pdf:266:All projects scoped into the assessment will involve capital dredging. This activity will create a plume of
IBPB8270R001F01_EIA REPORT(2).pdf:267:The extent of the sediment plume created by capital dredging is heavily dependent on the dredging plant
IBPB8270R001F01_EIA REPORT(2).pdf:267:potential spatial extent of sediment plume generation and deposition footprint has been identified from the
IBPB8270R001F01_EIA REPORT(2).pdf:267:sediment in the water column was predicted to be in close proximity to the dredger, with plume dispersion
IBPB8270R001F01_EIA REPORT(2).pdf:267:resulting in a significantly reduced concentration of suspended sediment beyond the source of the plume.
IBPB8270R001F01_EIA REPORT(2).pdf:268:of the plume for the NGCT scheme. The effect would be additive rather than cumulative (i.e. the predicted
IBPB8270R001F01_EIA REPORT(2).pdf:271:A cumulative effect on water quality as a result of dredging induced sediment plume generation will only
IBPB8270R001F01_EIA REPORT(2).pdf:271:In addition, the predictions made for each project (shown in Figures 27.2 to 27.4) represent sediment plume
IBPB8270R001F01_EIA REPORT(2).pdf:271:coincide to result in a scenario where sediment plumes combine at peak concentration (as predicted by the
IBPB8270R001F01_EIA REPORT(2).pdf:271:The sediment plume predicted due to the NGCT encompasses, and extends beyond, the area of the plume
IBPB8270R001F01_EIA REPORT(2).pdf:274:due to a sediment plume during capital dredging), given that the waterbirds potentially affected would be
IBPB8270R001F01_EIA REPORT(2).pdf:274:occur, with movement away from the zone of increased SSC. However, the effect of a combined plume (in
IBPB8270R001F01_EIA REPORT(2).pdf:275:Effects on fish populations due to a sediment plume during capital dredging
IBPB8270R001F01_EIA REPORT(2).pdf:275:There is potential for the sediment plumes predicted to be generated by the dredging required for NGCT,
IBPB8270R001F01_EIA REPORT(2).pdf:275:Significantly, however, the effect of a combined plume (in the zone of interaction) is not likely to result in a
IBPB8270R001F01_EIA REPORT(2).pdf:277: • Effects on fish due to the creation of a sediment plume from dredging.
IBPB8270R001F01_EIA REPORT(2).pdf:277: • Effects on water quality due to the creation of a sediment plume from dredging.
IBPB8270R001F01_EIA REPORT(2).pdf:277:of disturbance to fish due to creation of a sediment plume was a particular concern and therefore several
IBPB8270R001F01_EIA REPORT(2).pdf:277: plume.
IBPB8270R001F01_EIA REPORT(2).pdf:298:for granular material and clays) and the predicted extent of the sediment plume, it is expected that there
IBPB8270R001F01_EIA REPORT(2).pdf:299:and impact of the dredged plume, as any plume generated by operations has been predicted (by HR
IBPB8270R001F01_EIA REPORT(2).pdf:299:the other side. This will allow time for the plume to disperse before operations are moved to a different
IBPB8270R001F01_EIA REPORT(2).pdf:299:Mitigation of the plume effects by reducing the size of the dredger, and thus reducing the rate of overflow,
IBPB8270R001F01_EIA REPORT(2).pdf:299:the eastern or western side of the estuary. As with the TSHD, the plume from the barge loading operations
IBPB8270R001F01_EIA REPORT(2).pdf:302:An interaction between the sediment plumes predicted to be generated by capital dredging associated with
IBPB8270R001F01_EIA REPORT(2).pdf:302:alone, but within the same predicted spatial extent of the plume for NGCT (as the NGCT dredge footprint
IBPB8270R001F01_EIA REPORT(2).pdf:302:plume in the Tees is not likely to result in a different behavioural response in fish compared to that which
IBPB8270R001F01_EIA REPORT(2).pdf:302:channel works, the spatial extent of the plume (and consequently the effect on fish) would be significantly
IBPB8270R001F01_EIA REPORT(2).pdf:345: the studies on the dispersion of the sediment plume arising during dredging, as
IBPB8270R001F01_EIA REPORT(2).pdf:345: less instantaneous release of solids. Therefore, sediment plume studies were
IBPB8270R001F01_EIA REPORT(2).pdf:346: remain in suspension, forming a sediment plume. The plume from the overspill
IBPB8270R001F01_EIA REPORT(2).pdf:346: plume simulations.
IBPB8270R001F01_EIA REPORT(2).pdf:346: plumes of suspended fine sediment. Importantly the TSHD will result in a
IBPB8270R001F01_EIA REPORT(2).pdf:346: 7. The HR Wallingford developed model SEDPLUME-RW(3D) was used to
IBPB8270R001F01_EIA REPORT(2).pdf:346: within the Tees Estuary. SEDPLUME-RW(3D) used tidal currents computed by
IBPB8270R001F01_EIA REPORT(2).pdf:346: 8. Parameters for the sediment plume simulations for the CSD were established
IBPB8270R001F01_EIA REPORT(2).pdf:347: 9. Parameters for the sediment plume simulations for the TSHD were established,
IBPB8270R001F01_EIA REPORT(2).pdf:347: 10. For the EIA investigations the SEDPLUME-RW(3D) model was used to simulate
IBPB8270R001F01_EIA REPORT(2).pdf:347: because the sediment enters the water firstly in a dynamic plume phase (i.e. not
IBPB8270R001F01_EIA REPORT(2).pdf:347: sediment mixes with the water it behaves as a passive plume that is transported
IBPB8270R001F01_EIA REPORT(2).pdf:347: simulations assume that by the passive plume phase occurs at about 1m above
IBPB8270R001F01_EIA REPORT(2).pdf:353: approximate 1km2 of Seal Sands. The SEDPLUME model assumes that the
IBPB8270R001F01_EIA REPORT(2).pdf:377:6.4.6 Plume studies of Dabholm Gut outflow
IBPB8270R001F01_EIA REPORT(2).pdf:377: SEDPLUME-RW(3D). It should be noted that, as a consequence of the
IBPB8270R001F01_EIA REPORT(2).pdf:377: that following the proposed development the core of the plume of suspended
IBPB8270R001F01_EIA REPORT(2).pdf:599: coalescing plumes of white, grey and black vapour.
IBPB8270R001F01_EIA REPORT(2).pdf:632: Yes - the dredging plume No - control
IBPB8270R001F01_EIA REPORT(2).pdf:632: Yes – the deepened channel Yes – the proposed dredging could impact on lower sensitive Yes – the dredging plume
IBPB8270R001F01_EIA REPORT(2).pdf:632:Capital dredging could impact on habitats and the plume could potentially impact on higher could impact on migratory No
IBPB8270R001F01_EIA REPORT(2).pdf:633: channel within this water body is Yes – the potential plume could impact on water measures will be
IBPB8270R001F01_EIA REPORT(2).pdf:634: • Fish: Capital dredging (sediment plume).
IBPB8270R001F01_EIA REPORT(2).pdf:634: • Water quality: Capital dredging (sediment plume).
IBPB8270R001F01_EIA REPORT(2).pdf:636:of sediment plumes during dredging was modelled. The largest rise in peak suspended sediment
IBPB8270R001F01_EIA REPORT(2).pdf:636:the plume.
IBPB8270R001F01_EIA REPORT(2).pdf:637: extent and impact of the plume.
IBPB8270R001F01_EIA REPORT(2).pdf:637:The predicted plume as a result of capital dredging could impact on water quality. However, most of the
IBPB8270R001F01_EIA REPORT(2).pdf:652: Biology: fish Yes The dredging could potentially impact on migratory fish due to the sediment plume being
IBPB8270R001F01_EIA REPORT(2).pdf:652: dredging and associated plume will be longer than 14 days.
IBPB8270R001F01_EIA REPORT(2).pdf:653: Biology: fish Yes The dredging could potentially impact on migratory fish due to the sediment plume being
IBPB8270R001F01_EIA REPORT(2).pdf:653: dredging and associated plume will be longer than 14 days.
20220302_EIA_Consent_Decision_Response MLA202000079.pdf:12:create large sediment plumes, which could potentially impact the protected wreck
20220302_EIA_Consent_Decision_Response MLA202000079.pdf:14: plume.
IBPB8270R001F01_EIA REPORT.pdf:13:plumes during dredging), particularly as the use of BD typically results in lower environmental impact relative
IBPB8270R001F01_EIA REPORT.pdf:57: SEDPLUME-RW(3D) numerical modelling. Post construction effects were specifically assessed
IBPB8270R001F01_EIA REPORT.pdf:57: modelling of sediment plume released from construction activities.
IBPB8270R001F01_EIA REPORT.pdf:59:required) will generate a plume of sediment in the water column. The simulated dredge locations and the
IBPB8270R001F01_EIA REPORT.pdf:67:Due to the similarity of the mid to far-field effects of a plume created by the CSD dredging in the upper
IBPB8270R001F01_EIA REPORT.pdf:76:are predicted to occur (e.g. sediment plumes generated during capital dredging and effects on tidal currents
IBPB8270R001F01_EIA REPORT.pdf:91:suspension of sediments and release them into the water column as a plume. This would increase the TSS
IBPB8270R001F01_EIA REPORT.pdf:91:SSC are predicted to occur within the immediate vicinity of the dredger, but the sediment plume spreads
IBPB8270R001F01_EIA REPORT.pdf:92:types of dredger were considered in the plume dispersion studies, namely a CSD dredging mudstone (which
IBPB8270R001F01_EIA REPORT.pdf:93:The plume dispersion studies predict that, during the dredging of sand in the lower channel using a TSHD,
IBPB8270R001F01_EIA REPORT.pdf:93:The main mitigation measure to limit sediment plume is selection of the dredging method. As noted above,
IBPB8270R001F01_EIA REPORT.pdf:107:hydrodynamic and sedimentary plume modelling undertaken. This section excludes consideration of
IBPB8270R001F01_EIA REPORT.pdf:128:In general, sediment plumes induced by dredging are considered to pose only a limited risk to water quality
IBPB8270R001F01_EIA REPORT.pdf:128:background) are predicted in the immediate vicinity of the dredger. Sediment plume modelling predicts that
IBPB8270R001F01_EIA REPORT.pdf:156:of sediment into the water column, causing a sediment plume that could potentially affect habitats used by
IBPB8270R001F01_EIA REPORT.pdf:156:estuary. The modelled sediment dispersion plume from the proposed NGCT dredge does not interact with
IBPB8270R001F01_EIA REPORT.pdf:158:plume, the magnitude of the potential effect on feeding birds is predicted to be medium. Based on a receptor
IBPB8270R001F01_EIA REPORT.pdf:159:and impact of the dredged plume, as any plume generated by operations has been predicted (by HR
IBPB8270R001F01_EIA REPORT.pdf:159:the other side. This will allow time for the plume to disperse before operations are moved to a different
IBPB8270R001F01_EIA REPORT.pdf:159:Mitigation of the plume effects by reducing the size of the dredger, and thus reducing the rate of overflow,
IBPB8270R001F01_EIA REPORT.pdf:159:barge will be located either on the eastern or western side of the estuary. As with the TSHD, the plume
IBPB8270R001F01_EIA REPORT.pdf:169:occur (e.g. sediment plumes generated during capital dredging and effects on tidal currents during
IBPB8270R001F01_EIA REPORT.pdf:187:variation, in the immediate vicinity of the dredger (see Section 6). Sediment plume modelling has however
IBPB8270R001F01_EIA REPORT.pdf:187:The cross section of the estuary affected by the plume arising from the proposed dredging is particularly
IBPB8270R001F01_EIA REPORT.pdf:188: river. This is to reduce both the extent and impact of the dredged plume, as any plume generated
IBPB8270R001F01_EIA REPORT.pdf:188:Mitigation of the plume effects by reducing the size of the TSHD, and thus reducing the rate of overflow, is
IBPB8270R001F01_EIA REPORT.pdf:188:implementation of this measure will result in the plume from the barge loading operations remaining on one
IBPB8270R001F01_EIA REPORT.pdf:188:to the findings of the sediment plume modelling reporting in Section 6 (which illustrate that the sediment
IBPB8270R001F01_EIA REPORT.pdf:188:plume is predicted to remain within the estuary), results in a conclusion of no impact to fish spawning
IBPB8270R001F01_EIA REPORT.pdf:189:In general, sediment plumes induced by dredging are considered to pose only a limited risk to water quality
IBPB8270R001F01_EIA REPORT.pdf:189:The cross section of the estuary affected by the plume arising from the proposed dredging is particularly
IBPB8270R001F01_EIA REPORT.pdf:190:and clay, and up to 33 weeks for mudstone), in addition to the relatively localised nature of the plume (in
IBPB8270R001F01_EIA REPORT.pdf:226:Sediment plume modelling predicts that SSC would not increase above background concentrations by more
IBPB8270R001F01_EIA REPORT.pdf:226:The controls outlined in Section 7 (with regard to minimising sediment plume dispersion during dredging)
IBPB8270R001F01_EIA REPORT.pdf:259: influencing the same area as affected by the sediment plume); and,
IBPB8270R001F01_EIA REPORT.pdf:260:extent of the dredging and disposal plumes.
IBPB8270R001F01_EIA REPORT.pdf:266:All projects scoped into the assessment will involve capital dredging. This activity will create a plume of
IBPB8270R001F01_EIA REPORT.pdf:267:The extent of the sediment plume created by capital dredging is heavily dependent on the dredging plant
IBPB8270R001F01_EIA REPORT.pdf:267:potential spatial extent of sediment plume generation and deposition footprint has been identified from the
IBPB8270R001F01_EIA REPORT.pdf:267:sediment in the water column was predicted to be in close proximity to the dredger, with plume dispersion
IBPB8270R001F01_EIA REPORT.pdf:267:resulting in a significantly reduced concentration of suspended sediment beyond the source of the plume.
IBPB8270R001F01_EIA REPORT.pdf:268:of the plume for the NGCT scheme. The effect would be additive rather than cumulative (i.e. the predicted
IBPB8270R001F01_EIA REPORT.pdf:271:A cumulative effect on water quality as a result of dredging induced sediment plume generation will only
IBPB8270R001F01_EIA REPORT.pdf:271:In addition, the predictions made for each project (shown in Figures 27.2 to 27.4) represent sediment plume
IBPB8270R001F01_EIA REPORT.pdf:271:coincide to result in a scenario where sediment plumes combine at peak concentration (as predicted by the
IBPB8270R001F01_EIA REPORT.pdf:271:The sediment plume predicted due to the NGCT encompasses, and extends beyond, the area of the plume
IBPB8270R001F01_EIA REPORT.pdf:274:due to a sediment plume during capital dredging), given that the waterbirds potentially affected would be
IBPB8270R001F01_EIA REPORT.pdf:274:occur, with movement away from the zone of increased SSC. However, the effect of a combined plume (in
IBPB8270R001F01_EIA REPORT.pdf:275:Effects on fish populations due to a sediment plume during capital dredging
IBPB8270R001F01_EIA REPORT.pdf:275:There is potential for the sediment plumes predicted to be generated by the dredging required for NGCT,
IBPB8270R001F01_EIA REPORT.pdf:275:Significantly, however, the effect of a combined plume (in the zone of interaction) is not likely to result in a
IBPB8270R001F01_EIA REPORT.pdf:277: • Effects on fish due to the creation of a sediment plume from dredging.
IBPB8270R001F01_EIA REPORT.pdf:277: • Effects on water quality due to the creation of a sediment plume from dredging.
IBPB8270R001F01_EIA REPORT.pdf:277:of disturbance to fish due to creation of a sediment plume was a particular concern and therefore several
IBPB8270R001F01_EIA REPORT.pdf:277: plume.
IBPB8270R001F01_EIA REPORT.pdf:298:for granular material and clays) and the predicted extent of the sediment plume, it is expected that there
IBPB8270R001F01_EIA REPORT.pdf:299:and impact of the dredged plume, as any plume generated by operations has been predicted (by HR
IBPB8270R001F01_EIA REPORT.pdf:299:the other side. This will allow time for the plume to disperse before operations are moved to a different
IBPB8270R001F01_EIA REPORT.pdf:299:Mitigation of the plume effects by reducing the size of the dredger, and thus reducing the rate of overflow,
IBPB8270R001F01_EIA REPORT.pdf:299:the eastern or western side of the estuary. As with the TSHD, the plume from the barge loading operations
IBPB8270R001F01_EIA REPORT.pdf:302:An interaction between the sediment plumes predicted to be generated by capital dredging associated with
IBPB8270R001F01_EIA REPORT.pdf:302:alone, but within the same predicted spatial extent of the plume for NGCT (as the NGCT dredge footprint
IBPB8270R001F01_EIA REPORT.pdf:302:plume in the Tees is not likely to result in a different behavioural response in fish compared to that which
IBPB8270R001F01_EIA REPORT.pdf:302:channel works, the spatial extent of the plume (and consequently the effect on fish) would be significantly
IBPB8270R001F01_EIA REPORT.pdf:345: the studies on the dispersion of the sediment plume arising during dredging, as
IBPB8270R001F01_EIA REPORT.pdf:345: less instantaneous release of solids. Therefore, sediment plume studies were
IBPB8270R001F01_EIA REPORT.pdf:346: remain in suspension, forming a sediment plume. The plume from the overspill
IBPB8270R001F01_EIA REPORT.pdf:346: plume simulations.
IBPB8270R001F01_EIA REPORT.pdf:346: plumes of suspended fine sediment. Importantly the TSHD will result in a
IBPB8270R001F01_EIA REPORT.pdf:346: 7. The HR Wallingford developed model SEDPLUME-RW(3D) was used to
IBPB8270R001F01_EIA REPORT.pdf:346: within the Tees Estuary. SEDPLUME-RW(3D) used tidal currents computed by
IBPB8270R001F01_EIA REPORT.pdf:346: 8. Parameters for the sediment plume simulations for the CSD were established
IBPB8270R001F01_EIA REPORT.pdf:347: 9. Parameters for the sediment plume simulations for the TSHD were established,
IBPB8270R001F01_EIA REPORT.pdf:347: 10. For the EIA investigations the SEDPLUME-RW(3D) model was used to simulate
IBPB8270R001F01_EIA REPORT.pdf:347: because the sediment enters the water firstly in a dynamic plume phase (i.e. not
IBPB8270R001F01_EIA REPORT.pdf:347: sediment mixes with the water it behaves as a passive plume that is transported
IBPB8270R001F01_EIA REPORT.pdf:347: simulations assume that by the passive plume phase occurs at about 1m above
IBPB8270R001F01_EIA REPORT.pdf:353: approximate 1km2 of Seal Sands. The SEDPLUME model assumes that the
IBPB8270R001F01_EIA REPORT.pdf:377:6.4.6 Plume studies of Dabholm Gut outflow
IBPB8270R001F01_EIA REPORT.pdf:377: SEDPLUME-RW(3D). It should be noted that, as a consequence of the
IBPB8270R001F01_EIA REPORT.pdf:377: that following the proposed development the core of the plume of suspended
IBPB8270R001F01_EIA REPORT.pdf:599: coalescing plumes of white, grey and black vapour.
IBPB8270R001F01_EIA REPORT.pdf:632: Yes - the dredging plume No - control
IBPB8270R001F01_EIA REPORT.pdf:632: Yes – the deepened channel Yes – the proposed dredging could impact on lower sensitive Yes – the dredging plume
IBPB8270R001F01_EIA REPORT.pdf:632:Capital dredging could impact on habitats and the plume could potentially impact on higher could impact on migratory No
IBPB8270R001F01_EIA REPORT.pdf:633: channel within this water body is Yes – the potential plume could impact on water measures will be
IBPB8270R001F01_EIA REPORT.pdf:634: • Fish: Capital dredging (sediment plume).
IBPB8270R001F01_EIA REPORT.pdf:634: • Water quality: Capital dredging (sediment plume).
IBPB8270R001F01_EIA REPORT.pdf:636:of sediment plumes during dredging was modelled. The largest rise in peak suspended sediment
IBPB8270R001F01_EIA REPORT.pdf:636:the plume.
IBPB8270R001F01_EIA REPORT.pdf:637: extent and impact of the plume.
IBPB8270R001F01_EIA REPORT.pdf:637:The predicted plume as a result of capital dredging could impact on water quality. However, most of the
IBPB8270R001F01_EIA REPORT.pdf:652: Biology: fish Yes The dredging could potentially impact on migratory fish due to the sediment plume being
IBPB8270R001F01_EIA REPORT.pdf:652: dredging and associated plume will be longer than 14 days.
IBPB8270R001F01_EIA REPORT.pdf:653: Biology: fish Yes The dredging could potentially impact on migratory fish due to the sediment plume being
IBPB8270R001F01_EIA REPORT.pdf:653: dredging and associated plume will be longer than 14 days.
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:11:Based on the findings of a sediment quality survey and the sediment plume modelling results, no significant
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:11:construction works would result in the generation of a sediment plume which would reduce water quality on
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:11: river. This is to reduce both the extent and impact of the dredged plume, as any plume generated
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:11: deployed to the other side. This will allow time for the plume to disperse before operations are
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:11: plume from the barge loading operations remaining on one side of the river, albeit dispersing to a
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:12:the plume remaining on one side of the river, ensuring that one side of the river will remain relatively
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:12:unaffected by the plume.
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:13:in Section 8.2 will control the spatial extent of the sediment plume, resulting in a residual impact of minor
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:16:Infrastructure as a result of the proposed construction works. Sediment plume modelling predicts that there
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:16:Section 8.2 (with regard to minimising sediment plume dispersion during dredging) would be implemented
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:17:plume for the NGCT scheme. The effect would be additive rather than cumulative (i.e. the predicted impacts
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:18:WFD compliance. However, the risk of disturbance to fish due to creation of a sediment plume was a
PB8270-RHD-ZZ-XX-RP-Z-0002.pdf:18: plume. If dredging is to undertaken during the winter period, this would allow one side of the river
Schedule 7 - Archaeological WSI.pdf:12: coalescing plumes of white, grey and black vapour.
Schedule 8_ 20220302_EIA_Consent_Decision_Response MLA202000079.pdf:12:create large sediment plumes, which could potentially impact the protected wreck
Schedule 8_ 20220302_EIA_Consent_Decision_Response MLA202000079.pdf:14: plume.
MLA_2021_00215-PB5051-RHD-106-ZZ-RP-Z-0021 Tees Dock Ro-Ro 2 Environmental Report_Final-1.pdf:15:or another dredging technique with a closed bucket, will be used to minimise any potential sediment plume.
MLA_2021_00215-PB5051-RHD-106-ZZ-RP-Z-0021 Tees Dock Ro-Ro 2 Environmental Report_Final-1.pdf:33:The literature indicates that the suspended sediment plume induced by a clamshell bucket under estuarine
MLA_2021_00215-PB5051-RHD-106-ZZ-RP-Z-0021 Tees Dock Ro-Ro 2 Environmental Report_Final-1.pdf:33:gravitational settling predominates, and a final mixing zone in which plume sediments continue to settle
MLA_2021_00215-PB5051-RHD-106-ZZ-RP-Z-0021 Tees Dock Ro-Ro 2 Environmental Report_Final-1.pdf:48:CIRIA (2000) Scoping the assessment of sediment plumes from dredging. CIRIA Publication C547. London,
MLA_2021_00215-PB5051-RHD-106-ZZ-RP-Z-0021 Tees Dock Ro-Ro 2 Environmental Report_Final-1.pdf:75: water will be unaffected. significant sediment plumes due to its
MLA_2021_00215-PB5051-RHD-106-ZZ-RP-Z-0021 Tees Dock Ro-Ro 2 Environmental Report_Final-1.pdf:79:indicates that the suspended sediment plume induced by a clamshell bucket under estuarine conditions is
MLA_2021_00215-PB5051-RHD-106-ZZ-RP-Z-0021 Tees Dock Ro-Ro 2 Environmental Report_Final-1.pdf:79:settling predominates, and a final mixing zone in which plume sediments continue to settle governed
MLA_2021_00215-Tees Dock Ro-Ro 2 Environmental Report-13.pdf:15:or another dredging technique with a closed bucket, will be used to minimise any potential sediment plume.
MLA_2021_00215-Tees Dock Ro-Ro 2 Environmental Report-13.pdf:33:The literature indicates that the suspended sediment plume induced by a clamshell bucket under estuarine
MLA_2021_00215-Tees Dock Ro-Ro 2 Environmental Report-13.pdf:33:gravitational settling predominates, and a final mixing zone in which plume sediments continue to settle
MLA_2021_00215-Tees Dock Ro-Ro 2 Environmental Report-13.pdf:48:CIRIA (2000) Scoping the assessment of sediment plumes from dredging. CIRIA Publication C547. London,
MLA_2021_00215-Tees Dock Ro-Ro 2 Environmental Report-13.pdf:75: water will be unaffected. significant sediment plumes due to its
MLA_2021_00215-Tees Dock Ro-Ro 2 Environmental Report-13.pdf:79:indicates that the suspended sediment plume induced by a clamshell bucket under estuarine conditions is
MLA_2021_00215-Tees Dock Ro-Ro 2 Environmental Report-13.pdf:79:settling predominates, and a final mixing zone in which plume sediments continue to settle governed
Appendix 16.1a - DNV Report Rev1 2004.pdf:25:To determine suspended sediment plumes resulting from the dredging activities, a numerical
Appendix 16.1a - DNV Report Rev1 2004.pdf:25:equilibrium suspended plume is established by the end of two days of dredging. Simulations
Appendix 16.1a - DNV Report Rev1 2004.pdf:31:plumes which, dependent on the hydrodynamic conditions at the time, may distribute various
Appendix 16.1a - DNV Report Rev1 2004.pdf:57:picture of the suspended sediment plume showing the maximum concentrations computed
Appendix 16.1a - DNV Report Rev1 2004.pdf:57:one moves away from the dredging source, the plume is composed of only fine silt and clay
Appendix 16.1a - DNV Report Rev1 2004.pdf:57:Figure 7-1 shows the maximum sediment concentrations in the plume resulting from dredging at
Appendix 16.1a - DNV Report Rev1 2004.pdf:57:in this area, the plume is of limited extent. It can be seen that maximum total suspended sediment
Appendix 16.1a - DNV Report Rev1 2004.pdf:57:concentrations of 1000 mg/l are exceeded very near the source. With the plume being defined by
Appendix 16.1a - DNV Report Rev1 2004.pdf:57:concentrations greater than 5-10 mg/l, it can be seen that the plume extends for about 60 m from
Appendix 16.1a - DNV Report Rev1 2004.pdf:57:area. Figure 7-3 shows the same simulation during a spring tide period. Although the plume is
Appendix 16.1a - DNV Report Rev1 2004.pdf:57:tide the plume is larger than that generated during a neap tide. The maximum concentration for
Appendix 16.1a - DNV Report Rev1 2004.pdf:57:the spring tide plume is also greater than 1000 mg/l very near the dredge. Bottom deposition is
Appendix 16.1a - DNV Report Rev1 2004.pdf:59:plume is contained within Area #1 with a maximum extent of 170 m and maximum
Appendix 16.1a - DNV Report Rev1 2004.pdf:59:deposition. For dredging during a spring tide, Figure 7-7 displays the suspended sediment plume
Appendix 16.1a - DNV Report Rev1 2004.pdf:59:of maximum concentrations. Note that now the plume is very much larger and moves out of Area
Appendix 16.1a - DNV Report Rev1 2004.pdf:59:the plume being about 1000 m. The bottom deposition is shown in Figure 7-8.
Appendix 16.1a - DNV Report Rev1 2004.pdf:61:For dredging in Area #2, both the neap and spring tide simulations generate significant plumes,
Appendix 16.1a - DNV Report Rev1 2004.pdf:61:dredge are again in excess of 1000 mg/l for both plumes. Again, due to much larger currents, the
Appendix 16.1a - DNV Report Rev1 2004.pdf:61:spring tide plume extends much farther than the neap tide plume, e.g., 1000 m versus 400 m.
Appendix 16.1a - DNV Report Rev1 2004.pdf:61:Bottom deposition contours for both plumes are shown in Figure 7-10 and Figure 7-12,
Appendix 16.1a - DNV Report Rev1 2004.pdf:63:Again, as would be expected, the spring tide plume is much longer (1100 m versus 350 m) and
Appendix 16.1a - DNV Report Rev1 2004.pdf:63:larger than the neap tide plume. Maximum concentrations are now less than 1000 mg/l very near
Appendix 16.1a - DNV Report Rev1 2004.pdf:63:the source for both plumes.
Appendix 16.1a - DNV Report Rev1 2004.pdf:65:Figure 7-17 and Figure 7-19 show the maximum concentration of suspended sediment plumes
Appendix 16.1a - DNV Report Rev1 2004.pdf:65:backhoe dredge, the plume created during spring tide dredging is much larger than that created
Appendix 16.1a - DNV Report Rev1 2004.pdf:65:during a neap tide. Maximum concentrations are less than 1000 mg/l for both plumes along the
Appendix 16.1a - DNV Report Rev1 2004.pdf:65:dredging line. The spring tide suspended sediment plume extents all the way to the boundary of
Appendix 16.1a - DNV Report Rev1 2004.pdf:65:plume. Bottom deposition for both plumes is shown in Figure 7-18 and Figure 7-20, respectively.
Appendix 16.1a - DNV Report Rev1 2004.pdf:67:Figure 7-21 shows a superposition of the maximum concentration plumes when the hopper
Appendix 16.1a - DNV Report Rev1 2004.pdf:67:plume generated from only one dredge operating at a time.
Appendix 16.1a - DNV Report Rev1 2004.pdf:68:Figure 7-21 Superposition, max concentration plumes hopper operating in Seaton Channel
Appendix 16.1a - DNV Report Rev1 2004.pdf:79:size fractions SSFATE computations realistically represent suspended sediment plumes that will
Appendix 16.1a - DNV Report Rev1 2004.pdf:79:The size of the sediment plumes are significantly larger when dredging during a spring tide
Appendix 16.1a - DNV Report Rev1 2004.pdf:79:versus dredging during a neap tide. The size of the plumes generated by the hopper dredge can
Appendix 16.1a - DNV Report Rev1 2004.pdf:79:suspended sediment plumes when the backhoe is operating in Area #1. However, some
Appendix 16.1a - DNV Report Rev1 2004.pdf:80:concentrations up to 1000 mg/l close to the source of the plume, but the concentrations drop
Appendix 16.1a - DNV Report Rev1 2004.pdf:80:simultaneously, there will be little interaction of the suspended sediment plumes when the
Appendix 16.1a - DNV Report Rev1 2004.pdf:80:plume generated from only one dredge operating at a time.
3 EIS Appendices (3).pdf:140:To determine suspended sediment plumes resulting from the dredging activities, a numerical
3 EIS Appendices (3).pdf:140:equilibrium suspended plume is established by the end of two days of dredging. Simulations
3 EIS Appendices (3).pdf:146:plumes which, dependent on the hydrodynamic conditions at the time, may distribute various
3 EIS Appendices (3).pdf:172:picture of the suspended sediment plume showing the maximum concentrations computed
3 EIS Appendices (3).pdf:172:one moves away from the dredging source, the plume is composed of only fine silt and clay
3 EIS Appendices (3).pdf:172:Figure 7-1 shows the maximum sediment concentrations in the plume resulting from dredging at
3 EIS Appendices (3).pdf:172:in this area, the plume is of limited extent. It can be seen that maximum total suspended sediment
3 EIS Appendices (3).pdf:172:concentrations of 1000 mg/l are exceeded very near the source. With the plume being defined by
3 EIS Appendices (3).pdf:172:concentrations greater than 5-10 mg/l, it can be seen that the plume extends for about 60 m from
3 EIS Appendices (3).pdf:172:area. Figure 7-3 shows the same simulation during a spring tide period. Although the plume is
3 EIS Appendices (3).pdf:172:tide the plume is larger than that generated during a neap tide. The maximum concentration for
3 EIS Appendices (3).pdf:172:the spring tide plume is also greater than 1000 mg/l very near the dredge. Bottom deposition is
3 EIS Appendices (3).pdf:174:plume is contained within Area #1 with a maximum extent of 170 m and maximum
3 EIS Appendices (3).pdf:174:deposition. For dredging during a spring tide, Figure 7-7 displays the suspended sediment plume
3 EIS Appendices (3).pdf:174:of maximum concentrations. Note that now the plume is very much larger and moves out of Area
3 EIS Appendices (3).pdf:174:the plume being about 1000 m. The bottom deposition is shown in Figure 7-8.
3 EIS Appendices (3).pdf:176:For dredging in Area #2, both the neap and spring tide simulations generate significant plumes,
3 EIS Appendices (3).pdf:176:dredge are again in excess of 1000 mg/l for both plumes. Again, due to much larger currents, the
3 EIS Appendices (3).pdf:176:spring tide plume extends much farther than the neap tide plume, e.g., 1000 m versus 400 m.
3 EIS Appendices (3).pdf:176:Bottom deposition contours for both plumes are shown in Figure 7-10 and Figure 7-12,
3 EIS Appendices (3).pdf:178:Again, as would be expected, the spring tide plume is much longer (1100 m versus 350 m) and
3 EIS Appendices (3).pdf:178:larger than the neap tide plume. Maximum concentrations are now less than 1000 mg/l very near
3 EIS Appendices (3).pdf:178:the source for both plumes.
3 EIS Appendices (3).pdf:180:Figure 7-17 and Figure 7-19 show the maximum concentration of suspended sediment plumes
3 EIS Appendices (3).pdf:180:backhoe dredge, the plume created during spring tide dredging is much larger than that created
3 EIS Appendices (3).pdf:180:during a neap tide. Maximum concentrations are less than 1000 mg/l for both plumes along the
3 EIS Appendices (3).pdf:180:dredging line. The spring tide suspended sediment plume extents all the way to the boundary of
3 EIS Appendices (3).pdf:180:plume. Bottom deposition for both plumes is shown in Figure 7-18 and Figure 7-20, respectively.
3 EIS Appendices (3).pdf:182:Figure 7-21 shows a superposition of the maximum concentration plumes when the hopper
3 EIS Appendices (3).pdf:182:plume generated from only one dredge operating at a time.
3 EIS Appendices (3).pdf:183:Figure 7-21 Superposition, max concentration plumes hopper operating in Seaton Channel
3 EIS Appendices (3).pdf:194:size fractions SSFATE computations realistically represent suspended sediment plumes that will
3 EIS Appendices (3).pdf:194:The size of the sediment plumes are significantly larger when dredging during a spring tide
3 EIS Appendices (3).pdf:194:versus dredging during a neap tide. The size of the plumes generated by the hopper dredge can
3 EIS Appendices (3).pdf:194:suspended sediment plumes when the backhoe is operating in Area #1. However, some
3 EIS Appendices (3).pdf:195:concentrations up to 1000 mg/l close to the source of the plume, but the concentrations drop
3 EIS Appendices (3).pdf:195:simultaneously, there will be little interaction of the suspended sediment plumes when the
3 EIS Appendices (3).pdf:195:plume generated from only one dredge operating at a time.
Appendix 16.1b - DNV Addendum Report 2005.pdf:19:plume seriously affect fish migration, benthic fauna etc? What effects may this have on the food
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1141-MLA.2020.00506.2 SBQ MLV2 FIR 19 Response.pdf:2: is likely to compare with the suspended sediment concentrations and plumes modelled within the
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1141-MLA.2020.00506.2 SBQ MLV2 FIR 19 Response.pdf:4:The additional sediment plume modelling which was included and accepted as part of Marine Licence
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1141-MLA.2020.00506.2 SBQ MLV2 FIR 19 Response.pdf:5:As noted in the Hydrodynamic and Sediment Plume Modelling Technical Note submitted to support
PC1084-RHD-SB-EN-NT-EV-1127 MLA.2020.00506.R8 Response to Consultation Comments on Scheme of Monitoring.pdf:6: dredge footprint have been proposed based on the results of the sediment plume responses to the Environment Agency’s comments.
PC1084-RHD-SB-EN-NT-EV-1127 MLA.2020.00506.R8 Response to Consultation Comments on Scheme of Monitoring.pdf:6: influence of the sediment plume).
PC1084-RHD-SB-EN-NT-EV-1127 MLA.2020.00506.R8 Response to Consultation Comments on Scheme of Monitoring.pdf:6: the zone of influence of the sediment plume).
PC1084-RHD-SB-EN-NT-EV-1127 MLA.2020.00506.R8 Response to Consultation Comments on Scheme of Monitoring.pdf:9: influenced. Further, the EIA report concludes that the plume effects arising from activities.
20210119 MLA202000506 Tees South Bank Quay CP advice + JPQC.pdf:4: disposal. Again, concern is largely focused on the water quality issue of the sediment plume,
20210119 MLA202000506 Tees South Bank Quay CP advice + JPQC.pdf:4: are assessed as minor also, including the remobilisation of chemicals within the SSC plumes
PC1084-RHD-SB-EN-NT-EV-1127 MLA.2020.00506.R8 Response to Consultation Comments on Scheme of Monitoring.pdf:6: dredge footprint have been proposed based on the results of the sediment plume responses to the Environment Agency’s comments.
PC1084-RHD-SB-EN-NT-EV-1127 MLA.2020.00506.R8 Response to Consultation Comments on Scheme of Monitoring.pdf:6: influence of the sediment plume).
PC1084-RHD-SB-EN-NT-EV-1127 MLA.2020.00506.R8 Response to Consultation Comments on Scheme of Monitoring.pdf:6: the zone of influence of the sediment plume).
PC1084-RHD-SB-EN-NT-EV-1127 MLA.2020.00506.R8 Response to Consultation Comments on Scheme of Monitoring.pdf:9: influenced. Further, the EIA report concludes that the plume effects arising from activities.
20220615 MLA2020005061 L2021003331 Tees South Bank (phase 1) Revised Scheme of Monitoring Review Fisheries advice FINAL.pdf:3: • Site 2: Located within the predicted plume associated with dredging in the turning circle.
20220615 MLA2020005061 L2021003331 Tees South Bank (phase 1) Revised Scheme of Monitoring Review Fisheries advice FINAL.pdf:3: • Site 3: Located within the predicted plume associated with dredging in the quay area.
338486 - 338489, NE formal response to SBW MLA, 29.01.21.pdf:4: To restrict suspended sediment plumes to one side of the estuary at a time, and
338486 - 338489, NE formal response to SBW MLA, 29.01.21.pdf:6: To restrict suspended sediment plumes to one side of the estuary at a time, in
PC1084-RHD-SB-EN-NT-EV-1124 Updated Scheme of Monitoring - May 2022.pdf:1:plumes will fall to the riverbed, either soon after disturbance or spillage during the dredging operation (for
PC1084-RHD-SB-EN-NT-EV-1124 Updated Scheme of Monitoring - May 2022.pdf:2: • Site 2: Located within the predicted plume associated with dredging in the turning circle.
PC1084-RHD-SB-EN-NT-EV-1124 Updated Scheme of Monitoring - May 2022.pdf:2: • Site 3: Located within the predicted plume associated with dredging in the quay area.
PC1084-RHD-SB-EN-NT-EV-1124 P03 South Bank Phase 1 Scheme of Monitoring.pdf:2: footprint and outside of the predicted zone of influence of the sediment plume).
PC1084-RHD-SB-EN-NT-EV-1124 P03 South Bank Phase 1 Scheme of Monitoring.pdf:2: the sediment plume).
PC1084-RHD-SB-EN-NT-EV-1124 P03 South Bank Phase 1 Scheme of Monitoring.pdf:2:on the results of the sediment plume modelling that was undertaken as part of the Environmental Impact
PC1084-RHD-SB-EN-NT-EV-1124 P03 South Bank Phase 1 Scheme of Monitoring.pdf:3:plumes will fall to the riverbed, either soon after disturbance or spillage occurring during the dredging
MLA202000506 and MLA202000507 Draft HRA (2).pdf:26:sediment (water will cause plumes of sediment to measures for the proposed scheme in the
MLA202000506 and MLA202000507 Draft HRA (2).pdf:26:clarity) form. The plume effects arising form of dredging along the axis of the river
MLA202000506 and MLA202000507 Draft HRA (2).pdf:26: characterised by a short-lived one time, sediment plumes occupy only
MLA202000506 and MLA202000507 Draft HRA (2).pdf:26: • Black-headed gull ensure sediment plumes are only
MLA202000506 and MLA202000507 Draft HRA (2).pdf:26: Subtidal coarse sediment plume effects will be observed
MLA202000506 and MLA202000507 Draft HRA (2).pdf:30: • Dredging along the axis of the River Tees will be undertaken to ensure sediment plumes are only occurring in half of the river during capital dredging
MLA-2020-00506.pdf:1: plume will not travel far enough to cause any issues either. Impacts at the disposal site
MLA-2020-00506.pdf:1: this is unlikely to be impacted by the works as the sediment plume is unlikely to travel that
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:2: I. Revised modelling of the plume that takes into account other dredging activity which may
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:5: be dredged from the Tees, resulting in sediment plumes. The effects of the plumes have been
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:5: on the sediment plume model presented, the applicant concluded that peak concentrations from
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:5: dredging will be localised, with the lateral extent of the plume across the river channel predicted to
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:5: plume effects arising from dredging will be observed throughout the whole dredging continuous
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:5: low SSC from 0 to 8.5 mg/l. Modelling of the sediment plume during capital dredging indicates that
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:5: activities be undertaken simultaneously, the sediment plumes, could result in additive effect which
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:5: impact as far as possible. However, it is stated that ‘the additive effect of the sediment plumes from
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:6: a time in order to reduce the extent and impact of the sediment plume. However, in my opinion,
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:7: width of the river. This is to reduce both the extent and impact of the dredged plume, as
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:7: any plume generated by operations is predicted to remain on the same side of the river as
20210115 MLA202000506 South Bank Quay-phase 1 - Fisheries advice MG GE + JPQC.pdf:7: suspended sediment concentrations and the extent of the plume across the river channel will be
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:2: Dredging must be limited to working on one side of plumes to one side of the estuary
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:2:to migratory fish given that Environment Agency guidance recommends that the limit of any plume should
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:2:more commonly applied to temperature plumes, the Environment Agency has stated on previous projects
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:2:area of the estuary impacted by any sediment plumes resulting from dredging activities therefore this
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:2:dredging associated with the South Bank project that sediment suspended within the dredging plumes will
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:3:Linked to the relatively limited extent of the sediment plume, the EIA Report (Royal HaskoningDHV, 2020)
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:4:summarise, it is predicted that whilst the sediment plumes could combine to cover a larger area of the
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:4:extent of the cross-sectional area of the estuary as plume predictions indicate narrow plumes following
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:5:dredge plumes tend to be narrow and follow tidal flows thus indicating dredging on one side of the estuary
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:6:sensitive to dredging related sediment plumes.
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:8:Based on the predicted plume modelling output, the monitoring buoys are proposed to be positioned as
20220518 MLA202000506 L2021003331Tees South Bank (phase 1) Monitoring Plan Fisheries advice FINAL.pdf:3: proposed based on the results of the sediment plume modelling that was undertaken as part of
20220518 MLA202000506 L2021003331Tees South Bank (phase 1) Monitoring Plan Fisheries advice FINAL.pdf:7: plume effects arising from dredging will be observed continuously, throughout the whole
20220518 MLA202000506 L2021003331Tees South Bank (phase 1) Monitoring Plan Fisheries advice FINAL.pdf:9:Reason: To restrict suspended sediment plumes to one side of the estuary at a time, in order to
338486 - 338489, NE formal response to SBW MLA, 29.01.21 (1).pdf:4: To restrict suspended sediment plumes to one side of the estuary at a time, and
338486 - 338489, NE formal response to SBW MLA, 29.01.21 (1).pdf:6: To restrict suspended sediment plumes to one side of the estuary at a time, in
20210201 MLA202000506 MLA202000507 Tees South Bank Phases 1 and 2 - EIA Licence Advice Minute - SEAL Advice v2+SJB.pdf:5: and would likely require sediment and plume dispersal modelling as part of a cumulative
MLA202000506 and MLA202000507 Draft HRA.pdf:25:sediment (water will cause plumes of sediment to measures for the proposed scheme in the
MLA202000506 and MLA202000507 Draft HRA.pdf:25:clarity) form. The plume effects arising form of dredging along the axis of the river
MLA202000506 and MLA202000507 Draft HRA.pdf:25: characterised by a short-lived one time, sediment plumes occupy only
MLA202000506 and MLA202000507 Draft HRA.pdf:25: • Black-headed gull ensure sediment plumes are only
MLA202000506 and MLA202000507 Draft HRA.pdf:25: Subtidal coarse sediment plume effects will be observed
MLA202000506 and MLA202000507 Draft HRA.pdf:29: • Dredging along the axis of the River Tees will be undertaken to ensure sediment plumes are only occurring in half of the river during capital dredging
20210615 MLA202000506 MLA202000507 Tees South Bank Phases 1 and 2 - EIA _ SEAL Advice Followup+SJB.pdf:6: volumes might present a risk due to any potential dispersal plume. I defer comment to
20210615 MLA202000506 MLA202000507 Tees South Bank Phases 1 and 2 - EIA _ SEAL Advice Followup+SJB.pdf:6: potential for accumulation at the site and or plume dispersal modelling). OSPAR Returns
20220608 MLA2020005061 L20121003331 Cefas advice Final.pdf:3: Sediment Plume Modelling_Final.pdf and ‘pdf sections 2.1 and 2.2.’ which were listed on MCMS
20220608 MLA2020005061 L20121003331 Cefas advice Final.pdf:3: with a knowledge of coastal process review the hydrodynamic and sediment plume modelling
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:8:5 Hydrodynamic and sedimentary plume modelling report
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:55: Environmental Statement. modelling and modelling of sediment plume
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:57: Environmental Statement. 2014 modelling and modelling of sediment plume released from
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:60: • Sediment plume modelling: The updated and verified 3D Tees Estuary Tidal Model was used to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:60: coupling with a sediment plume model built in MIKE21-MT software. The sediment plume model
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:91:offshore site will both result in sediment plumes. These effects have been investigated using numerical
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:91:changes in bed thickness when the suspended sediment falls from the plume to become deposited on the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:92: represent a plume that would occur at any one point in time (such plumes are shown in the timestep
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:92: become affected by a plume at some point during the dredging or disposal activities (in some areas
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:92:or river channel). To illustrate this, Figures 6.32 – 6.35 shows the maximum extent of the plume during a
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:92:When the dredger is at the south-western end of the transect, the maximum spatial extent of the plume on
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:92:Middlesbrough Dock. When the dredger is at the north-eastern end of the transect, the extent of the plume
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:92:new quay. However, in all cases considered, the lateral extent of the plume across the river channel is very
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:92:narrow and the magnitude of the SSC within the plume beyond a few hundred metres from the point of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:92:release is of the order of 10 to 20mg/l and in the extremities of the plume reduces further to the same order
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:93:Figure 6.32 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:94:Figure 6.33 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:95:Figure 6.34 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:96:Figure 6.35 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:97:Results from this scenario are broadly similar to those from Stage 1, but now separate plumes are created
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:97:plumes can coalesce and collectively occupy around half the width of the river channel as they move
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:98:Figure 6.37 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:99:Figure 6.38 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:99:plume (at low concentrations) becomes slightly greater; (ii) the extent of the plume across the river channel
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:99:becomes wider; and (iii) at times two plumes are created by the in-parallel dredging activities. Despite these
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:100:Figures 6.40 – 6.43 shows the maximum extent of the plume during a release from the south-western corner
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:100:and the spatial extents of the plume arising from Stage 3 of the dredging are much lower than those
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:101:Figure 6.40 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:102:Figure 6.41 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:103:Figure 6.42 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:104:Figure 6.43 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:104:the maximum plume extent and maximum SSC values within the plume are much lower than experienced
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:104:during both Stages 1 and 2 of the dredging (note the slight plume shown in the mid channel is a remnant of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:104:maximum extent of the plume is confined to within the length of the proposed quay and covers only a very
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:105:phase of the tide). Figure 6.45 and 6.46 shows the maximum extent of the plume during a release from the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:105:On the ebb phase, the plume can extend at low (<30mg/l) concentrations along the jetties of the Oil Terminal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:105:Depot. Under no conditions does the plume enter Tees Dock at any significant concentration.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:106:Figure 6.45 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:107:Figure 6.46 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:107:the plume is created at the turning circle and along parts of the north bank of the river. As with previous
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:108:The sediment plumes that arise from the four stages of the dredging could potentially affect areas of riverbed
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:108:that during the predicted four months of dredging, all individual or coalesced plume effects are confined to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:108:Furthermore, all plumes associated with dredging of the berthing pocket and river channel in the vicinity of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:108:whilst all plumes associated with dredging of the turning circle are confined to the left bank (north of centre
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:109:No plume effects (and by implication no deposition effects) of a significant level above background values
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:110:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:110:zone of influence from the sediment plumes.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:111:Within this maximum zone of influence from sediment plumes and bed deposition, the following receptors
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:112:elevations in SSC drop rapidly after each dredging plume has dispersed, and return to baseline levels at
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:the 10-minute duration of disposal activity; and (iii) at selected intervals thereafter until the initial plume
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. It can then
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:This plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:At 30 minutes after cessation of discharge (Plot F), the plume is less than 250mg/l at its localised centre,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:phase of the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:activity commences and starts to form its own sediment plume (Plot H), the initial plume has moved
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:sufficiently far from its point of release that it does not coalesce with the new plume and, by this time, is less
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:not visible in the plots at the magnitudes presented. The original plume continues to disperse such that
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:although when the discharge is made during the flooding tide, the plume moves in a south-easterly direction,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:along the axis of principal tidal flows. At times when the release is around slack water, the plume tends to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:118:west or south-east, respectively). However, when this occurs the concentration in the plume reduces readily
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:119:Figure 6.60 Plume of enhanced SSCs arising from disposal activities during Stage 1 of the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:120:from the BHD (although the time intervals are greater), the initial plume has greater SSC values at its centre,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:120:case for maximum SSC), the plume resides in spatial extent around the point of release during the slack
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:120:plume has started to move towards the south-east through advection by the flood tidal currents, and the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:120:release point (Plot F). At this point in time, the TSHD plume has further reduced in peak concentration to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:120:around 200mg/l. Some 30 minutes later, the TSHD plume and subsequent BHD plume have fully coalesced,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:120:with two peaks in concentration; the original TSHD plume has a peak now around 100mg/l locally at its
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:120:centre whilst the more recently formed (but smaller) BHD plume has a peak SSC value at its centre of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:120:previous TSHD release, the now fully coalesced plume has a peak SSC of around 100mg/l very locally and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:120:plume remains present a further 45 minutes later, the original coalesced plume is considerably smaller in
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:120:successive disposal events, any coalescence of subsequent plumes would continue to result in only
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:120:coalescence of successive plumes at significant concentrations or for long durations is very low even during
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:121:Figure 6.61 Plume of enhanced SSCs arising from disposal activities during Stage 2 of the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:122:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. The
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:122:plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:122:The plumes associated with Stage 3 disposal activities are generally lower in concentration than those for
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:122:Indeed, the plume arising from Stage 3 disposal activities fully disperses before the next subsequent
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:122:in this offshore area). Due to this, there is no possibility of plumes coalescing from Stage 3 disposal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:123:Figure 6.4 Plume of enhanced SSCs arising from disposal activities during Stage 3 of the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:124:Like during Stage 2, there is potential for the plume from a TSHD discharge to coalesce with a preceding or
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:124:Plot A shows the residual plume from a TSHD disposal some 5 minutes before the commencement of a
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:124:separate plumes at 45 minutes after cessation of the BHD discharge. A further 30 minutes later, another
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:124:TSHD release occurs within the previous BHD plume extent (Plot E). Peak concentrations from the TSHD
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:124:plume has widely dispersed, a further BHD release is made some 50 minutes later, again within the previous
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:124:(now coalesced) plumes. Despite this coalesced plume now containing elements of three separate
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:124:the residual plume shown in Plot A coalesce with the ‘three-release’ plume (Plot G), although the SSC
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:124:values at the point of overlap are very low (~10mg/l). Around 55 minutes later, the plume is now mostly
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:124:disposal site, leading to coalescence of subsequent plumes, the resulting temporary, short duration effects
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:125:Figure 6.5 Plume of enhanced SSCs arising from disposal activities during Stage 4 of the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:126:for coalescence of subsequent plumes is greatest. In reality, subsequent disposals will be at different parts
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:126:At the extremities of the plume extent, there are wide zones of relatively low SSC values (<100mg/l).
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:126:sediment plume associated with one release event (this example being from Stage 1). It can be seen that
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:126:is negligible, whilst to the north it covers a similar zone to the sediment plume for this disposal event, which
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:130:the northern and southern boundaries (Figure 6.68). This correlates to the areas where a plume will extend
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:131:The river dredging and offshore disposal activities will both cause plumes of sediment to form close to the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:131:release point of material into the water column. These plumes will disperse under wave and current action
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:131:Once a plume is generated, the highest SSC values will be recorded at the point of river dredging or offshore
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:131:advected away from the point of release by the prevailing currents. At the peripheries of each plume, the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:131:working in parallel, there could be instances where two separately formed plumes coalesce to form one
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:131:(spatially) larger plume. However, the same principles of dispersion by prevailing currents applies, with
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:132:The plume effects arising from the river dredging are characterised by a short-lived localised increase in
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:132:plume effects will be observed throughout much of the approximately four-month period, but at varying
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:132:extents during the four different stages. During Stages 1-3 the dredging-related plume effects will be largely
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:132:Dock and Tees Dock. During Stage 4 the dredging-related plume effects will be largely confined to the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:132:very minor magnitudes, in areas covering the same spatial extent as the sediment plumes. Where this
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:132:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:132:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected by tidal currents
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:143: the findings of hydrodynamic and sedimentary plume
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:143: sediment and create smothering effects / turbidity / sediment plumes.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:144:are predicted to occur (e.g. sediment plumes generated during capital dredging and effects on tidal currents
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:157:Capital dredging would result in the creation of sediment plumes. To consider the potential extent and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:157:In all tidal conditions modelled, the lateral extent of the plume across the river channel is very narrow and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:157:the magnitude of concentrations within the plume beyond a few hundred metres from the point of release is
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:157:in the order of 10 - 20mg/l and in the extremities of the plume, reduces further to concentrations 0-10mg/l
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:157:Results for this stage were similar to those in Stage 1 but with separate plumes created by the different
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:157:dredgers. At some points in the cycle, areas of these initially separate plumes combine as they move
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:157:The maximum concentrations and the spatial extents of the plume arising from Stage 3 of the dredging are
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:157:and the production rate of dredging is notably lower. Figure 7.5 shows an example plume during Stage 3
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:157:Again, peak concentrations close to the dredger are shown in the plume modelling output. On the ebb
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:157:phase, the plume can extend at low concentrations (<30mg/l) along the jetties of the Oil Terminal towards
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:158:Figure 7. 3 Plume of suspended sediment concentrations arising from dredging activities during Stage 2
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:159:Figure 7. 4 Plume arising from dredging activities during Stage 1 of the capital dredge (release from the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:160:Figure 7. 5 Plume of suspended sediment concentrations arising from dredging activities during Stage
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:161:Figure 7.6 Plume of enhanced suspended sediment concentrations arising from dredging activities
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:162:sediment plume is not predicted to reach The Gares water quality monitoring point, no effects on the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:162:The relatively limited nature of the plume extents predicted for the proposed capital dredging indicates that
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:166:Additionally, information from sediment plume modelling (see Section 7.5.1) indicates that only the Smiths
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:194:hydrodynamic and sedimentary plume modelling undertaken. This section excludes consideration of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:210:In general, sediment plumes induced by dredging are considered to pose only a limited risk to water quality
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:210:dredging periods. The sediment plume generated by dredging would likely be dispersed by tidal currents
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:211:immediate vicinity of the dredger. Sediment plume modelling predicts different plume extents and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:211:cases, the sediment plume is predicted to be very narrow within the river, with the phase of dredging with
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:211:extremities of the plume.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:211:All plumes associated with different stages of dredging in the vicinity of the proposed new quay are confined
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:211:to the southern bank of the river, whilst all plumes associated with dredging of the turning circle are confined
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:211:to the northern bank. No plume effects of a significant level above background values are anticipated to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:211:The sediment plume modelling reported within Section 6 also extracted time series plots of changes in SSC
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:212:from the sediment plumes.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:212:(deposition) from the sediment plume model were extracted at a series of points within the affected river
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:256: hydrodynamic and sedimentary plume effects would not extend to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:257: hydrodynamic and sedimentary plume effects would not extend to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:296:In summary, the largest sediment plumes are likely to arise during Stage 2 of the dredging (i.e. BHD and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:296:(it is not a sediment plume, rather a combined zone of influence). The sediment dispersion modelling of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:296:distance from the dredging vessel, both laterally and along the line of the vessel, with plumes diminishing
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:296:of this assessment, the sediment plume may be regarded as representing a temporary loss of foraging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:297:terns do not forage to any significant extent within the predicted range of the sediment plume. Likewise, the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:297:England, 2018a), and the area likely to be affected by the sediment plume at any one time represents around
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:297:available even if the plume does result in temporary occlusion from the affected area. Furthermore, SSC
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:298:and the other stages of the dredge campaign would result in a smaller plume than that described for Stage
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:298: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:298: plume generated by operations is predicted to collectively occupy around half the width of the river
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:298:With the implementation of the above mitigation measure, the modelled plume would only occupy half of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:309:informed by the hydrodynamic and sedimentary plume modelling undertaken, as well as the understanding
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:318:details of the increase in SSC, including the visual output of sediment plume modelling for the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:319:sediment plume creating a ‘barrier’ effect could cause a significant disruption to the annual migration pattern,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:319:during a period of very hot and dry weather. Modelling of the sediment plume during capital dredging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:320:vessel, both laterally and along the line of the vessel. The periphery of the plume (10 to 20 mg/l) extends
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:320:The cross section of the river channel affected by the plume is particularly relevant when considering
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:320:narrow plume along the axis of the river.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:320:period. However, while unlikely, it has to be taken into account that sediment plumes encompassing the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:320: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:320: plume generated by operations is predicted to remain on the same side of the river as the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:320:Mitigation of the plume effects by reducing the size of the TSHD, and thus reducing the rate of overflow, is
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:424:well as hydrodynamic and sedimentary plume modelling reported in Section 6.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:478:As the offshore disposal commences, a plume of sediment would be generated with the greatest
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:478:concentrations predicted at the end of the discharge period. The sediment plume is predicted to increase
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:478:At 30 minutes after cessation of discharge, the plume is less than 250mg/l at its localised centre, reducing
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:478:the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of less than
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:478:commences and starts to form its own sediment plume, the initial plume has moved sufficiently far from its
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:478:point of release that it does not coalesce with the new plume and, by this time, is less than 40mg/l in SSC
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:478:at the magnitudes presented. The original plume continues to disperse such that after 4 hours and 25
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:478:At times when the release is around slack water, the plume tends to reside closer to the point of release for
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:478:However, when this occurs the concentration in the plume reduces readily because more material falls to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:479:Based on the modelled effects of the sediment plume at the Tees Bay C disposal site described above, it is
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:490: influencing the same area as affected by the sediment plume); and,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:491:the basis of the potential extent of the dredging and disposal plumes.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:500:All projects scoped into the CIA involve will involve capital dredging. This activity will create a plume of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:500:The extent of the sediment plume created by capital dredging is heavily dependent on the dredging plant
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:501:important to note that figures showing the “maximum extent of sediment plume dispersion and deposition”
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:501:do not represent a plume that would occur at any one point in time (such plumes are shown in the timestep
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:501:affected by a plume at some point during the dredging or disposal activities (in some areas this will be on a
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:501:Consequently, for the purposes of this CIA, the maximum zones of influence of sediment plume dispersion
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:501:of sediment plume dispersion and deposition onto the river and/or seabed during capital dredging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:501:sediment in the water column was predicted to be in close proximity to the dredger, with plume dispersion
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:501:resulting in a significantly reduced concentration of suspended sediment beyond the source of the plume.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:501:material will be re-dredged as part of the capital works for each scheme. At the peripheries of each plume,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:502:(right) as a result of the proposed scheme [Note: plots show sediment plume impacts arising from dredging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:506:addition, the predictions made for each project represent sediment plume dispersion under specific tidal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:506:where sediment plumes combine at peak concentration (as predicted by the EIA studies for each project)
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:506:at any location. Additionally, mitigation is outlined for all three schemes which would reduce plume extents
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:506:proposed scheme, it is considered unlikely that the plumes would overlap. As a result, there may be a
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:506:additional mitigation measures are identified to reduce any resulting sediment plume as far as possible and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:507:plumes.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:507:(deposition) from the sediment plume model were extracted at a series of points within the affected river
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:513:plumes occupy only half of the river cross section) has also been proposed for the NGCT project. For the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:513:England, 2018a), the area affected even by the combined plumes is likely to be low (for example, should
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:513:dredging plumes together will still affect only around 0.5% of the SPA subtidal habitat (Royal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:513:HaskoningDHV, 2015)). However, the additive effect of the sediment plumes from separate dredging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:514:sediment plumes may deter such species from migrating to and from spawning sites.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:514:the respective sediment plumes could result in an additive effect, as demonstrated in Figures 27.1 to 27.3.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:514:Significantly, the effect of a combined plume is not likely to result in a different behavioural response in fish
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:514:compared with the effect of the projects in isolation, although the increased plume footprint may increase
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:514:of the sediment plumes from separate dredging campaigns cannot be completely avoided if the campaigns
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:522:WFD water body (approximately 6.3km, see Figure 28.1) and plume modelling results described in Section
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:528: measures identified for the Tees estuary. habitats located within sediment plumes created
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:532:Capital dredging within the river would result in sediment plumes. To consider the potential extent and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:532: BHD working to dredge the In all tidal conditions modelled, the lateral extent of the plume across the river channel
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:532: upper soft material in the is very narrow and the magnitude of concentrations within the plume beyond a few
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:532: channel. extremities of the plume, reduces further to concentrations 0-10mg/l.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:532: 2 Results for this stage were similar to those in Stage 1 but with separate plumes
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:532: separate plumes combine as they move upstream and downstream according to the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:532: 3 BHD working to dredge the The maximum concentrations and the spatial extents of the plume arising from Stage
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:532: channel. notably lower. Plume very small and located close to the dredging activity.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:532: 4 Again, peak concentrations close to the dredger are shown in the plume modelling
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:532: output. On the ebb phase, the plume can extend at low concentrations (<30mg/l)
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:534:represent a more conservative scenario, as sediment plume modelling outlined above indicates relatively
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:534:limited plume extents for the majority of the capital dredge for the proposed scheme.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:535:Additionally, sediment plume results for Smiths Dock monitoring point (point 3) indicated only temporary
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:535:be temporary which would disperse following cessation of the works. Plume extents during each of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:537:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:538:zone of influence from the sediment plumes. As a result, a deterioration in ecological class status is not
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:539:peak migratory season, when a sediment plume creating a ‘barrier’ effect could cause a significant disruption
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:539:extent and impact of the plume. This allows a passage through which migratory fish will be able to move
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:539: dredging along the axis of the river to ensure the plumes are
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:544: • Cumulative effects of sediment plumes and associated effects on water quality and fish
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:545:Section 27 considers the potential cumulative effects of the proposed schemes on sediment plumes and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:545:marine water quality. To summarise, whilst the sediment plumes could combine to cover a larger area of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:545:plumes spreading across the width of the channel. Additionally, due to navigational safety, it is unlikely that
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:549:strips thus limiting the plume extent. As a result, non- temporary effects on water quality and associated
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:550:would be sediment plumes associated with dredging simultaneously. However, on further consideration,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:559:proposed scheme nor the modelled extent of the maximum-expected sediment plume from the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:559:influence of the proposed scheme will be determined by the sediment plume during dredging activities.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:572:The capital dredging of the river will cause plumes of sediment to form. The plume effects arising from the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:572:operation, the plume effects will be observed throughout much of the approximately five-month period, but
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:572:of sediment from the plumes on the river or seabed will be very small.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:575:requires use of TSHD and BHD on soft sediment in the channel and berth pocket) will result in plumes of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:575:with plumes diminishing typically to levels of <30 mg/l but often <10mg/l at a distance of no more than a few
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:575:England, 2018a). The area affected by the sediment plume generated from proposed dredging, though
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:580:In terms of intra-project effects on foraging common terns, the zone of influence from the sediment plume
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:580:of the area would not be increased since the plume is considered to be the most far-reaching effect on tern
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:583:Effects on fish may be compounded by the combined sediment plumes of other projects or plans that may
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:584:An interaction between the sediment plumes would only occur in the unlikely event that the capital dredging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:584:Plumes from each project would be temporary and short-lived. The same applies for the Anglo American
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:584:combined plumes is expected to be minor.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:584:sediment plumes occupy only half of the river cross section) has also been proposed for the NGCT project.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:586:The zone of influence from predicted sediment plumes (including the combined plumes from the proposed
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-10.pdf:593:sediment plumes arising from dredging. Construction Industry Research and Information Association
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:2:that the most important potential coastal process impact would be changes in suspended sediment plumes,
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:2:suspended sediment plumes; that being each disposal within the licensed disposal site being released at
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:2:plumes from separate disposal activities over the whole dredging campaign.
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:2:licensed disposal site is a worst case for potential plume coalescence it is not realistic in terms of changes
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:2:bed thickness caused by deposition of material from the sediment plume associated with one single release
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:4:(Figure 6.67). This correlates to the areas where a plume will extend along the axis of the prevailing tidal
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:15: • Revised modelling of the plume that takes into account other dredging activity which may be
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:15:each project are presented and discussed. It is not practicable to undertake a combined sediment plume
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:15:addition, the predictions made for each project represent sediment plume dispersion under specific tidal
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:16:scenario where sediment plumes combine at peak concentration (as predicted by the EIA studies for each
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:16:project) at any location. Additionally, mitigation is outlined for all three schemes which would reduce plume
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:16:We would also like to reiterate that the sediment plumes shown in Section 6 of the EIA Report are maximum
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:16:not represent a plume that would occur at any one point of time. Rather, the figures show the areas of the
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-34.pdf:16:river channel that will become affected by a plume at some point during the dredging campaign (in some
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:2:that the most important potential coastal process impact would be changes in suspended sediment plumes,
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:2:suspended sediment plumes; that being each disposal within the licensed disposal site being released at
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:2:plumes from separate disposal activities over the whole dredging campaign.
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:2:licensed disposal site is a worst case for potential plume coalescence it is not realistic in terms of changes
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:2:bed thickness caused by deposition of material from the sediment plume associated with one single release
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:4:(Figure 6.67). This correlates to the areas where a plume will extend along the axis of the prevailing tidal
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:15: • Revised modelling of the plume that takes into account other dredging activity which may be
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:15:each project are presented and discussed. It is not practicable to undertake a combined sediment plume
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:15:addition, the predictions made for each project represent sediment plume dispersion under specific tidal
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:16:scenario where sediment plumes combine at peak concentration (as predicted by the EIA studies for each
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:16:project) at any location. Additionally, mitigation is outlined for all three schemes which would reduce plume
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:16:We would also like to reiterate that the sediment plumes shown in Section 6 of the EIA Report are maximum
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:16:not represent a plume that would occur at any one point of time. Rather, the figures show the areas of the
MLA_2020_00506-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-25.pdf:16:river channel that will become affected by a plume at some point during the dredging campaign (in some
MLA_2020_00506-PC1084-RHD-EN-SB-ME-EV-1144-MLA.2022.00506.2 South Bank Quay FIR 20 Response.pdf:6:additional dredged material is likely to compare with the suspended sediment concentrations and plumes
MLA_2020_00506-PC1084-RHD-EN-SB-ME-EV-1144-MLA.2022.00506.2 South Bank Quay FIR 20 Response.pdf:6:(provided during consultation for MLV1 in relation to the Hydrodynamic and Sediment Plume Modelling
MLA_2020_00506-PC1084-RHD-EN-SB-ME-EV-1144-MLA.2022.00506.2 South Bank Quay FIR 20 Response.pdf:7:assessment. I recognise that the Applicant has provided the Hydrodynamic and Sediment Plume
MLA_2020_00506-PC1084-RHD-EN-SB-ME-EV-1144-MLA.2022.00506.2 South Bank Quay FIR 20 Response.pdf:7:comparison of the suspended sediment concentrations and plumes modelled within the original EIA, with
MLA_2020_00506-PC1084-RHD-EN-SB-ME-EV-1144-MLA.2022.00506.2 South Bank Quay FIR 20 Response.pdf:7:Please provide a side-by-side comparison of the suspended sediment concentrations and plumes
MLA_2020_00506-PC1084-RHD-EN-SB-ME-EV-1144-MLA.2022.00506.2 South Bank Quay FIR 20 Response.pdf:7:already been modelled, the sediment plume should not be any more extensive than that already
MLA_2020_00506-PC1084-RHD-EN-SB-ME-EV-1144-MLA.2022.00506.2 South Bank Quay FIR 20 Response.pdf:8: plume modelling
MLA_2020_00506-PC1084-RHD-EN-SB-ME-EV-1144-MLA.2022.00506.2 South Bank Quay FIR 20 Response.pdf:8:Request 19 Response section 3.6, states that “as noted in the Hydrodynamic and Sediment Plume
MLA_2020_00506-PC1084-RHD-EN-SB-ME-EV-1144-MLA.2022.00506.2 South Bank Quay FIR 20 Response.pdf:9:Hydrodynamic and Sediment Plume Modelling Technical Note provided as Appendix D in document 5 in
MLA_2020_00506-PC1084-RHD-EN-SB-ME-EV-1144-MLA.2022.00506.2 South Bank Quay FIR 20 Response.pdf:9:The hydrodynamic and sediment plume modelling report took into account (i.e., pre-empted) the
MLA_2020_00506-PC1084-RHD-EN-SB-ME-EV-1144-MLA.2022.00506.2 South Bank Quay FIR 20 Response.pdf:11:Report and the updated hydrodynamic and sediment plume modelling report submitted in support of
PC1084-RHD-SB-EN-NT-EV-1124 Updated Scheme of Monitoring - May 2022.pdf:1:plumes will fall to the riverbed, either soon after disturbance or spillage during the dredging operation (for
PC1084-RHD-SB-EN-NT-EV-1124 Updated Scheme of Monitoring - May 2022.pdf:2: • Site 2: Located within the predicted plume associated with dredging in the turning circle.
PC1084-RHD-SB-EN-NT-EV-1124 Updated Scheme of Monitoring - May 2022.pdf:2: • Site 3: Located within the predicted plume associated with dredging in the quay area.
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:1:Hydrodynamic and Sediment Plume Modelling
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:5:of the EIA Report and the accompanying Appendix 5: Hydrodynamics and Sedimentary Plume
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:5: a sediment plume model built in MIKE3-MT software. The sediment plume model was run for the entire
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:7:been re-assessed using a combination of expert geomorphological assessment (EGA) and sediment plume
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:8:Report and the accompanying Appendix 5: Hydrodynamics and Sedimentary Plume Modelling of the
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:10:plume dispersion model are described in this section.
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:14:The following assumptions have been made for the simulation of sediment plumes arising from dredging
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:14:is a conservative approach for worst case plume effect. The dredger will actually move around the dredging
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:14:release is a conservative approach for worst case plume effect. Recognising that the barges could actually
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:15:programme. It is important to note that this type of figure does not represent a plume or deposition that
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:15:of the river channel or offshore area that will become affected by a plume or deposition at some point during
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:16:are generally slightly lower than near-bed effects, and during the dredging, all plume effects are confined to
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:16:and the Oil Terminal on the north bank at the downstream end. Furthermore, all plumes associated with
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:16:bank (south of centre line) portion of the channel’s width, whilst all plumes associated with dredging of the
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:16:that they respectively affect. No plume effects (and by implication no deposition effects) of a significant level
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:21:bed thickness caused by the deposition of sediment from the plumes created by river dredging. It can be
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:21:sediment plumes.
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:22:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:23:in the model at a single release point and the potential for coalescence of subsequent depositional plumes
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:23:and downstream boundaries. At the extremities of the plume extent, there are wide zones of relatively low
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:26:plume for the worst case considered (all material released at a single central point). It can be seen that
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:26:the sediment plume. In reality, disposals will be at different points within the licensed area, and so such a
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:27:and shown in Figure 3-14. In keeping with the results for the plume dispersion, the updated modelling
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:29:cause plumes of sediment to form close to the release points of material into the water column. These
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:29:plumes will disperse under wave and current action and all sediment particles suspended in the water
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-0001 Technical Note - Hydrodynamic and Sediment Plume Modelling_Final-49.pdf:29:Report and the accompanying Appendix 5: Hydrodynamics and Sedimentary Plume Modelling of the
MLA_2020_00506-MLA_2020_00506_2_RFI 19_Cefas Comments_MMO requested updates.pdf:2: water quality and sediment plumes) is sufficient to cover this activity. It is also noted that the approach taken has been previously agreed as
MLA_2020_00506-MLA_2020_00506_2_RFI 19_Cefas Comments_MMO requested updates.pdf:4:The reason for this is that increases in suspended sediment concentration in the water column and plumes of suspended sediment created
MLA_2020_00506-MLA_2020_00506_2_RFI 19_Cefas Comments_MMO requested updates.pdf:4:discussion of how the additional dredged material is likely to compare with the suspended sediment concentrations and plumes modelled
MLA_2020_00506-MLA_2020_00506_2_RFI 19_Cefas Comments_MMO requested updates.pdf:5:Plume Modelling report. As such, there is no change to the required durations of dredging as proposed and assessed as part of MLV1.” As
MLA_2020_00506-MLA_2020_00506_2_RFI 19_Cefas Comments_MMO requested updates.pdf:6:comments2. In previous fisheries advice1, advisors highlighted that the sediment plume arising from the proposed dredging regime had the
MLA_2020_00506-MLA_2020_00506_2_RFI 19_Cefas Comments_MMO requested updates.pdf:7: suspended sediment concentrations and plumes modelled within the original EIA. The MMO do not require additional modelling at this
MLA_2020_00506-MLA_2020_00506_2_RFI 19_Cefas Comments_MMO requested updates.pdf:10:John, S.A., Challinor, S.L., Simpson, M., Burt, T.N. and Spearman, J. (2000). Scoping the assessment of sediment plumes arising from
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-16.pdf:14:The tool requires the input of predicted suspended solids concentrations arising from the dredge plume. For
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-16.pdf:14:predicted to last for a duration of approximately four weeks. The likely plume extent during this phase is
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-16.pdf:16:uplift column in Appendix 2). It can be seen in Figure 2.2 that the suspended sediment plume is predicted
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-16.pdf:17:However, sediment plume modelling does not predict long term and large scale extents of elevated
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-16.pdf:27:suspended sediment during dredging is expected to be in the form of a narrow plume within the river, which
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-16.pdf:45:parameters, the short term nature of the sediment plume and limited spatial extent would limit any EQS
MLA_2020_00506-MLA_2020_00506_2_Cefas_comments_for_action_RFI_19.pdf:3: suspended sediment concentrations and plumes modelled within the original EIA, in order for
MLA_2020_00506-MLA_2020_00506_2_Cefas_comments_for_action_RFI_19.pdf:3: in relation to the Hydrodynamic and Sediment Plume Modelling Technical Note), that “the
MLA_2020_00506-MLA_2020_00506_2_Cefas_comments_for_action_RFI_19.pdf:3: Hydrodynamic and Sediment Plume Modelling Technical Note within this consultation, however,
MLA_2020_00506-MLA_2020_00506_2_Cefas_comments_for_action_RFI_19.pdf:3: sediment concentrations and plumes modelled within the original EIA, with the most up to date
MLA_2020_00506-MLA_2020_00506_2_Cefas_comments_for_action_RFI_19.pdf:3: Sediment Plume Modelling Technical Note submitted to support Variation 1, the capital dredging
MLA_2020_00506-MLA_2020_00506_2_Cefas_comments_for_action_RFI_19.pdf:3: response directs me to the Hydrodynamic and Sediment Plume Modelling Technical Note
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:8:5 Hydrodynamic and sedimentary plume modelling report
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:55: Environmental Statement. modelling and modelling of sediment plume
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:57: Environmental Statement. 2014 modelling and modelling of sediment plume released from
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:60: • Sediment plume modelling: The updated and verified 3D Tees Estuary Tidal Model was used to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:60: coupling with a sediment plume model built in MIKE21-MT software. The sediment plume model
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:91:offshore site will both result in sediment plumes. These effects have been investigated using numerical
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:91:changes in bed thickness when the suspended sediment falls from the plume to become deposited on the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92: represent a plume that would occur at any one point in time (such plumes are shown in the timestep
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92: become affected by a plume at some point during the dredging or disposal activities (in some areas
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:or river channel). To illustrate this, Figures 6.32 – 6.35 shows the maximum extent of the plume during a
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:When the dredger is at the south-western end of the transect, the maximum spatial extent of the plume on
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:Middlesbrough Dock. When the dredger is at the north-eastern end of the transect, the extent of the plume
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:new quay. However, in all cases considered, the lateral extent of the plume across the river channel is very
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:narrow and the magnitude of the SSC within the plume beyond a few hundred metres from the point of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:release is of the order of 10 to 20mg/l and in the extremities of the plume reduces further to the same order
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:93:Figure 6.32 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:94:Figure 6.33 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:95:Figure 6.34 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:96:Figure 6.35 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:97:Results from this scenario are broadly similar to those from Stage 1, but now separate plumes are created
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:97:plumes can coalesce and collectively occupy around half the width of the river channel as they move
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:98:Figure 6.37 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:99:Figure 6.38 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:99:plume (at low concentrations) becomes slightly greater; (ii) the extent of the plume across the river channel
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:99:becomes wider; and (iii) at times two plumes are created by the in-parallel dredging activities. Despite these
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:100:Figures 6.40 – 6.43 shows the maximum extent of the plume during a release from the south-western corner
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:100:and the spatial extents of the plume arising from Stage 3 of the dredging are much lower than those
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:101:Figure 6.40 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:102:Figure 6.41 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:103:Figure 6.42 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:104:Figure 6.43 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:104:the maximum plume extent and maximum SSC values within the plume are much lower than experienced
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:104:during both Stages 1 and 2 of the dredging (note the slight plume shown in the mid channel is a remnant of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:104:maximum extent of the plume is confined to within the length of the proposed quay and covers only a very
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:105:phase of the tide). Figure 6.45 and 6.46 shows the maximum extent of the plume during a release from the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:105:On the ebb phase, the plume can extend at low (<30mg/l) concentrations along the jetties of the Oil Terminal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:105:Depot. Under no conditions does the plume enter Tees Dock at any significant concentration.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:106:Figure 6.45 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:107:Figure 6.46 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:107:the plume is created at the turning circle and along parts of the north bank of the river. As with previous
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:108:The sediment plumes that arise from the four stages of the dredging could potentially affect areas of riverbed
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:108:that during the predicted four months of dredging, all individual or coalesced plume effects are confined to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:108:Furthermore, all plumes associated with dredging of the berthing pocket and river channel in the vicinity of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:108:whilst all plumes associated with dredging of the turning circle are confined to the left bank (north of centre
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:109:No plume effects (and by implication no deposition effects) of a significant level above background values
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:110:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:110:zone of influence from the sediment plumes.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:111:Within this maximum zone of influence from sediment plumes and bed deposition, the following receptors
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:112:elevations in SSC drop rapidly after each dredging plume has dispersed, and return to baseline levels at
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:the 10-minute duration of disposal activity; and (iii) at selected intervals thereafter until the initial plume
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. It can then
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:This plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:At 30 minutes after cessation of discharge (Plot F), the plume is less than 250mg/l at its localised centre,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:phase of the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:activity commences and starts to form its own sediment plume (Plot H), the initial plume has moved
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:sufficiently far from its point of release that it does not coalesce with the new plume and, by this time, is less
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:not visible in the plots at the magnitudes presented. The original plume continues to disperse such that
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:although when the discharge is made during the flooding tide, the plume moves in a south-easterly direction,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:along the axis of principal tidal flows. At times when the release is around slack water, the plume tends to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:west or south-east, respectively). However, when this occurs the concentration in the plume reduces readily
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:119:Figure 6.60 Plume of enhanced SSCs arising from disposal activities during Stage 1 of the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:from the BHD (although the time intervals are greater), the initial plume has greater SSC values at its centre,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:case for maximum SSC), the plume resides in spatial extent around the point of release during the slack
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:plume has started to move towards the south-east through advection by the flood tidal currents, and the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:release point (Plot F). At this point in time, the TSHD plume has further reduced in peak concentration to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:around 200mg/l. Some 30 minutes later, the TSHD plume and subsequent BHD plume have fully coalesced,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:with two peaks in concentration; the original TSHD plume has a peak now around 100mg/l locally at its
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:centre whilst the more recently formed (but smaller) BHD plume has a peak SSC value at its centre of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:previous TSHD release, the now fully coalesced plume has a peak SSC of around 100mg/l very locally and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:plume remains present a further 45 minutes later, the original coalesced plume is considerably smaller in
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:successive disposal events, any coalescence of subsequent plumes would continue to result in only
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:coalescence of successive plumes at significant concentrations or for long durations is very low even during
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:121:Figure 6.61 Plume of enhanced SSCs arising from disposal activities during Stage 2 of the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:122:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. The
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:122:plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:122:The plumes associated with Stage 3 disposal activities are generally lower in concentration than those for
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:122:Indeed, the plume arising from Stage 3 disposal activities fully disperses before the next subsequent
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:122:in this offshore area). Due to this, there is no possibility of plumes coalescing from Stage 3 disposal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:123:Figure 6.4 Plume of enhanced SSCs arising from disposal activities during Stage 3 of the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:Like during Stage 2, there is potential for the plume from a TSHD discharge to coalesce with a preceding or
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:Plot A shows the residual plume from a TSHD disposal some 5 minutes before the commencement of a
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:separate plumes at 45 minutes after cessation of the BHD discharge. A further 30 minutes later, another
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:TSHD release occurs within the previous BHD plume extent (Plot E). Peak concentrations from the TSHD
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:plume has widely dispersed, a further BHD release is made some 50 minutes later, again within the previous
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:(now coalesced) plumes. Despite this coalesced plume now containing elements of three separate
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:the residual plume shown in Plot A coalesce with the ‘three-release’ plume (Plot G), although the SSC
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:values at the point of overlap are very low (~10mg/l). Around 55 minutes later, the plume is now mostly
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:disposal site, leading to coalescence of subsequent plumes, the resulting temporary, short duration effects
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:125:Figure 6.5 Plume of enhanced SSCs arising from disposal activities during Stage 4 of the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:126:for coalescence of subsequent plumes is greatest. In reality, subsequent disposals will be at different parts
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:126:At the extremities of the plume extent, there are wide zones of relatively low SSC values (<100mg/l).
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:126:sediment plume associated with one release event (this example being from Stage 1). It can be seen that
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:126:is negligible, whilst to the north it covers a similar zone to the sediment plume for this disposal event, which
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:130:the northern and southern boundaries (Figure 6.68). This correlates to the areas where a plume will extend
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:The river dredging and offshore disposal activities will both cause plumes of sediment to form close to the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:release point of material into the water column. These plumes will disperse under wave and current action
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:Once a plume is generated, the highest SSC values will be recorded at the point of river dredging or offshore
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:advected away from the point of release by the prevailing currents. At the peripheries of each plume, the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:working in parallel, there could be instances where two separately formed plumes coalesce to form one
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:(spatially) larger plume. However, the same principles of dispersion by prevailing currents applies, with
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:The plume effects arising from the river dredging are characterised by a short-lived localised increase in
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:plume effects will be observed throughout much of the approximately four-month period, but at varying
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:extents during the four different stages. During Stages 1-3 the dredging-related plume effects will be largely
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:Dock and Tees Dock. During Stage 4 the dredging-related plume effects will be largely confined to the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:very minor magnitudes, in areas covering the same spatial extent as the sediment plumes. Where this
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected by tidal currents
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:143: the findings of hydrodynamic and sedimentary plume
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:143: sediment and create smothering effects / turbidity / sediment plumes.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:144:are predicted to occur (e.g. sediment plumes generated during capital dredging and effects on tidal currents
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:Capital dredging would result in the creation of sediment plumes. To consider the potential extent and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:In all tidal conditions modelled, the lateral extent of the plume across the river channel is very narrow and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:the magnitude of concentrations within the plume beyond a few hundred metres from the point of release is
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:in the order of 10 - 20mg/l and in the extremities of the plume, reduces further to concentrations 0-10mg/l
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:Results for this stage were similar to those in Stage 1 but with separate plumes created by the different
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:dredgers. At some points in the cycle, areas of these initially separate plumes combine as they move
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:The maximum concentrations and the spatial extents of the plume arising from Stage 3 of the dredging are
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:and the production rate of dredging is notably lower. Figure 7.5 shows an example plume during Stage 3
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:Again, peak concentrations close to the dredger are shown in the plume modelling output. On the ebb
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:phase, the plume can extend at low concentrations (<30mg/l) along the jetties of the Oil Terminal towards
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:158:Figure 7. 3 Plume of suspended sediment concentrations arising from dredging activities during Stage 2
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:159:Figure 7. 4 Plume arising from dredging activities during Stage 1 of the capital dredge (release from the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:160:Figure 7. 5 Plume of suspended sediment concentrations arising from dredging activities during Stage
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:161:Figure 7.6 Plume of enhanced suspended sediment concentrations arising from dredging activities
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:162:sediment plume is not predicted to reach The Gares water quality monitoring point, no effects on the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:162:The relatively limited nature of the plume extents predicted for the proposed capital dredging indicates that
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:166:Additionally, information from sediment plume modelling (see Section 7.5.1) indicates that only the Smiths
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:194:hydrodynamic and sedimentary plume modelling undertaken. This section excludes consideration of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:210:In general, sediment plumes induced by dredging are considered to pose only a limited risk to water quality
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:210:dredging periods. The sediment plume generated by dredging would likely be dispersed by tidal currents
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:immediate vicinity of the dredger. Sediment plume modelling predicts different plume extents and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:cases, the sediment plume is predicted to be very narrow within the river, with the phase of dredging with
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:extremities of the plume.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:All plumes associated with different stages of dredging in the vicinity of the proposed new quay are confined
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:to the southern bank of the river, whilst all plumes associated with dredging of the turning circle are confined
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:to the northern bank. No plume effects of a significant level above background values are anticipated to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:The sediment plume modelling reported within Section 6 also extracted time series plots of changes in SSC
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:212:from the sediment plumes.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:212:(deposition) from the sediment plume model were extracted at a series of points within the affected river
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:256: hydrodynamic and sedimentary plume effects would not extend to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:257: hydrodynamic and sedimentary plume effects would not extend to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:296:In summary, the largest sediment plumes are likely to arise during Stage 2 of the dredging (i.e. BHD and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:296:(it is not a sediment plume, rather a combined zone of influence). The sediment dispersion modelling of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:296:distance from the dredging vessel, both laterally and along the line of the vessel, with plumes diminishing
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:296:of this assessment, the sediment plume may be regarded as representing a temporary loss of foraging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:297:terns do not forage to any significant extent within the predicted range of the sediment plume. Likewise, the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:297:England, 2018a), and the area likely to be affected by the sediment plume at any one time represents around
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:297:available even if the plume does result in temporary occlusion from the affected area. Furthermore, SSC
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:298:and the other stages of the dredge campaign would result in a smaller plume than that described for Stage
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:298: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:298: plume generated by operations is predicted to collectively occupy around half the width of the river
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:298:With the implementation of the above mitigation measure, the modelled plume would only occupy half of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:309:informed by the hydrodynamic and sedimentary plume modelling undertaken, as well as the understanding
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:318:details of the increase in SSC, including the visual output of sediment plume modelling for the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:319:sediment plume creating a ‘barrier’ effect could cause a significant disruption to the annual migration pattern,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:319:during a period of very hot and dry weather. Modelling of the sediment plume during capital dredging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320:vessel, both laterally and along the line of the vessel. The periphery of the plume (10 to 20 mg/l) extends
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320:The cross section of the river channel affected by the plume is particularly relevant when considering
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320:narrow plume along the axis of the river.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320:period. However, while unlikely, it has to be taken into account that sediment plumes encompassing the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320: plume generated by operations is predicted to remain on the same side of the river as the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320:Mitigation of the plume effects by reducing the size of the TSHD, and thus reducing the rate of overflow, is
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:424:well as hydrodynamic and sedimentary plume modelling reported in Section 6.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:As the offshore disposal commences, a plume of sediment would be generated with the greatest
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:concentrations predicted at the end of the discharge period. The sediment plume is predicted to increase
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:At 30 minutes after cessation of discharge, the plume is less than 250mg/l at its localised centre, reducing
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of less than
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:commences and starts to form its own sediment plume, the initial plume has moved sufficiently far from its
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:point of release that it does not coalesce with the new plume and, by this time, is less than 40mg/l in SSC
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:at the magnitudes presented. The original plume continues to disperse such that after 4 hours and 25
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:At times when the release is around slack water, the plume tends to reside closer to the point of release for
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:However, when this occurs the concentration in the plume reduces readily because more material falls to
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:479:Based on the modelled effects of the sediment plume at the Tees Bay C disposal site described above, it is
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:490: influencing the same area as affected by the sediment plume); and,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:491:the basis of the potential extent of the dredging and disposal plumes.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:500:All projects scoped into the CIA involve will involve capital dredging. This activity will create a plume of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:500:The extent of the sediment plume created by capital dredging is heavily dependent on the dredging plant
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:important to note that figures showing the “maximum extent of sediment plume dispersion and deposition”
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:do not represent a plume that would occur at any one point in time (such plumes are shown in the timestep
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:affected by a plume at some point during the dredging or disposal activities (in some areas this will be on a
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:Consequently, for the purposes of this CIA, the maximum zones of influence of sediment plume dispersion
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:of sediment plume dispersion and deposition onto the river and/or seabed during capital dredging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:sediment in the water column was predicted to be in close proximity to the dredger, with plume dispersion
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:resulting in a significantly reduced concentration of suspended sediment beyond the source of the plume.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:material will be re-dredged as part of the capital works for each scheme. At the peripheries of each plume,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:502:(right) as a result of the proposed scheme [Note: plots show sediment plume impacts arising from dredging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:506:addition, the predictions made for each project represent sediment plume dispersion under specific tidal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:506:where sediment plumes combine at peak concentration (as predicted by the EIA studies for each project)
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:506:at any location. Additionally, mitigation is outlined for all three schemes which would reduce plume extents
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:506:proposed scheme, it is considered unlikely that the plumes would overlap. As a result, there may be a
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:506:additional mitigation measures are identified to reduce any resulting sediment plume as far as possible and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:507:plumes.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:507:(deposition) from the sediment plume model were extracted at a series of points within the affected river
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:513:plumes occupy only half of the river cross section) has also been proposed for the NGCT project. For the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:513:England, 2018a), the area affected even by the combined plumes is likely to be low (for example, should
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:513:dredging plumes together will still affect only around 0.5% of the SPA subtidal habitat (Royal
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:513:HaskoningDHV, 2015)). However, the additive effect of the sediment plumes from separate dredging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:514:sediment plumes may deter such species from migrating to and from spawning sites.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:514:the respective sediment plumes could result in an additive effect, as demonstrated in Figures 27.1 to 27.3.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:514:Significantly, the effect of a combined plume is not likely to result in a different behavioural response in fish
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:514:compared with the effect of the projects in isolation, although the increased plume footprint may increase
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:514:of the sediment plumes from separate dredging campaigns cannot be completely avoided if the campaigns
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:522:WFD water body (approximately 6.3km, see Figure 28.1) and plume modelling results described in Section
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:528: measures identified for the Tees estuary. habitats located within sediment plumes created
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532:Capital dredging within the river would result in sediment plumes. To consider the potential extent and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: BHD working to dredge the In all tidal conditions modelled, the lateral extent of the plume across the river channel
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: upper soft material in the is very narrow and the magnitude of concentrations within the plume beyond a few
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: channel. extremities of the plume, reduces further to concentrations 0-10mg/l.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: 2 Results for this stage were similar to those in Stage 1 but with separate plumes
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: separate plumes combine as they move upstream and downstream according to the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: 3 BHD working to dredge the The maximum concentrations and the spatial extents of the plume arising from Stage
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: channel. notably lower. Plume very small and located close to the dredging activity.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: 4 Again, peak concentrations close to the dredger are shown in the plume modelling
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: output. On the ebb phase, the plume can extend at low concentrations (<30mg/l)
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:534:represent a more conservative scenario, as sediment plume modelling outlined above indicates relatively
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:534:limited plume extents for the majority of the capital dredge for the proposed scheme.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:535:Additionally, sediment plume results for Smiths Dock monitoring point (point 3) indicated only temporary
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:535:be temporary which would disperse following cessation of the works. Plume extents during each of the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:537:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:538:zone of influence from the sediment plumes. As a result, a deterioration in ecological class status is not
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:539:peak migratory season, when a sediment plume creating a ‘barrier’ effect could cause a significant disruption
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:539:extent and impact of the plume. This allows a passage through which migratory fish will be able to move
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:539: dredging along the axis of the river to ensure the plumes are
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:544: • Cumulative effects of sediment plumes and associated effects on water quality and fish
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:545:Section 27 considers the potential cumulative effects of the proposed schemes on sediment plumes and
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:545:marine water quality. To summarise, whilst the sediment plumes could combine to cover a larger area of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:545:plumes spreading across the width of the channel. Additionally, due to navigational safety, it is unlikely that
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:549:strips thus limiting the plume extent. As a result, non- temporary effects on water quality and associated
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:550:would be sediment plumes associated with dredging simultaneously. However, on further consideration,
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:559:proposed scheme nor the modelled extent of the maximum-expected sediment plume from the capital
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:559:influence of the proposed scheme will be determined by the sediment plume during dredging activities.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:572:The capital dredging of the river will cause plumes of sediment to form. The plume effects arising from the
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:572:operation, the plume effects will be observed throughout much of the approximately five-month period, but
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:572:of sediment from the plumes on the river or seabed will be very small.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:575:requires use of TSHD and BHD on soft sediment in the channel and berth pocket) will result in plumes of
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:575:with plumes diminishing typically to levels of <30 mg/l but often <10mg/l at a distance of no more than a few
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:575:England, 2018a). The area affected by the sediment plume generated from proposed dredging, though
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:580:In terms of intra-project effects on foraging common terns, the zone of influence from the sediment plume
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:580:of the area would not be increased since the plume is considered to be the most far-reaching effect on tern
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:583:Effects on fish may be compounded by the combined sediment plumes of other projects or plans that may
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:584:An interaction between the sediment plumes would only occur in the unlikely event that the capital dredging
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:584:Plumes from each project would be temporary and short-lived. The same applies for the Anglo American
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:584:combined plumes is expected to be minor.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:584:sediment plumes occupy only half of the river cross section) has also been proposed for the NGCT project.
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:586:The zone of influence from predicted sediment plumes (including the combined plumes from the proposed
MLA_2020_00506-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:593:sediment plumes arising from dredging. Construction Industry Research and Information Association
MLA_2020_00506-Licence Document (Marine).pdf:16: To restrict suspended sediment plumes to one side of the estuary at a time, in order to reduce loss of tern foraging habitat.
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:2:MLV1 was supported by further sediment plume modelling, presented in the Hydrodynamic and
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:2:Sediment Plume Modelling Report (see Appendix D). This updated modelling was undertaken to reflect
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:9:at the furthest point from the midline of the current channel. The hydrodynamic and sediment plume
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:9:currents, and so is transported in a direction parallel with the river banks. Sediment plumes are therefore
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:15:The sediment plume modelling undertaken for the original EIA Report predicted that highest
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:15:hundred metres of the point of release, and again to 0-10mg/L at the extremities of the plume. In all
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:15:form a narrow plume within the river channel, with plumes associated with dredging of the berthing
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:15:the sediment plume, including the following:
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:15:The updated hydrodynamic and sediment plume modelling presented within the modelling note
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:15:taken as a worst case scenario for the hydrodynamic and sediment plume modelling undertaken in
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:16:by the updated sediment plume modelling submitted in support of MLV1 (see Appendix D), which
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:16:will increase under MLV2, the updated sediment plume modelling submitted in support of MLV1 (see
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:16:hydrodynamic and sediment plume modelling report prepared and submitted in support of MLV1 (Royal
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:18:CIRIA (2000). Scoping the assessment of sediment plumes from dredging (C547).
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:18:Royal HaskoningDHV (2022). South Bank Quay Technical Note: Hydrodynamic and Sediment Plume
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:28:extent and impact of any sediment plumes that could affect migrating species.
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:30:Appendix D Hydrodynamic and Sediment Plume Modelling
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:31:Hydrodynamic and Sediment Plume Modelling
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:35:of the EIA Report and the accompanying Appendix 5: Hydrodynamics and Sedimentary Plume
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:35: a sediment plume model built in MIKE3-MT software. The sediment plume model was run for the entire
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:37:been re-assessed using a combination of expert geomorphological assessment (EGA) and sediment plume
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:38:Report and the accompanying Appendix 5: Hydrodynamics and Sedimentary Plume Modelling of the
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:40:plume dispersion model are described in this section.
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:44:The following assumptions have been made for the simulation of sediment plumes arising from dredging
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:44:is a conservative approach for worst case plume effect. The dredger will actually move around the dredging
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:44:release is a conservative approach for worst case plume effect. Recognising that the barges could actually
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:45:programme. It is important to note that this type of figure does not represent a plume or deposition that
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:45:of the river channel or offshore area that will become affected by a plume or deposition at some point during
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:46:are generally slightly lower than near-bed effects, and during the dredging, all plume effects are confined to
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:46:and the Oil Terminal on the north bank at the downstream end. Furthermore, all plumes associated with
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:46:bank (south of centre line) portion of the channel’s width, whilst all plumes associated with dredging of the
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:46:that they respectively affect. No plume effects (and by implication no deposition effects) of a significant level
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:51:bed thickness caused by the deposition of sediment from the plumes created by river dredging. It can be
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:51:sediment plumes.
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:52:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:53:in the model at a single release point and the potential for coalescence of subsequent depositional plumes
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:53:and downstream boundaries. At the extremities of the plume extent, there are wide zones of relatively low
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:56:plume for the worst case considered (all material released at a single central point). It can be seen that
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:56:the sediment plume. In reality, disposals will be at different points within the licensed area, and so such a
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:57:and shown in Figure 3-14. In keeping with the results for the plume dispersion, the updated modelling
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:59:cause plumes of sediment to form close to the release points of material into the water column. These
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:59:plumes will disperse under wave and current action and all sediment particles suspended in the water
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1142-MLA.2020.00506.2 South Bank Quay MLV2 Appraisal of Environmental Effects.pdf:59:Report and the accompanying Appendix 5: Hydrodynamics and Sedimentary Plume Modelling of the
MLA_2020_00506-MLA202000506 and MLA202000507 Final HRA .pdf:25:sediment (water will cause plumes of sediment to measures for the proposed scheme in the
MLA_2020_00506-MLA202000506 and MLA202000507 Final HRA .pdf:25:clarity) form. The plume effects arising form of dredging along the axis of the river
MLA_2020_00506-MLA202000506 and MLA202000507 Final HRA .pdf:25: characterised by a short-lived one time, sediment plumes occupy only
MLA_2020_00506-MLA202000506 and MLA202000507 Final HRA .pdf:25: • Black-headed gull ensure sediment plumes are only
MLA_2020_00506-MLA202000506 and MLA202000507 Final HRA .pdf:25: Subtidal coarse sediment plume effects will be observed
MLA_2020_00506-MLA202000506 and MLA202000507 Final HRA .pdf:29: • Dredging along the axis of the River Tees will be undertaken to ensure sediment plumes are only occurring in half of the river during capital dredging
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1139 South Bank Quay Phase 1 FIR 18 Response.pdf:2:marine water and sediment quality. However, updated sedimentary plume modelling to take account of the
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1139 South Bank Quay Phase 1 FIR 18 Response.pdf:2:conclusions presented within the Hydrodynamic and Sediment Plume Modelling report remain valid for
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1139 South Bank Quay Phase 1 FIR 18 Response.pdf:2:hydrodynamic and sediment plume model?
MLA_2020_00506-MLA_2020_00506_2_RFI 18.pdf:2: Hydrodynamic and Sediment Plume Modelling report remain valid for MLV2.” Please clarify
MLA_2020_00506-MLA_2020_00506_2_RFI 18.pdf:2: and sediment plume model?
MLA_2020_00506-Cefas RFI South Bank Phase 1 & 2-15.pdf:1: Revised modelling of the plume that takes into account other dredging
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1137-MLA.2020.00506.2 South Bank Quay Marine Licence Variation 2 RFI 17-66.pdf:1: to those shown in the plume model and the mean value used in the SediChem tool previously or
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1137-MLA.2020.00506.2 South Bank Quay Marine Licence Variation 2 RFI 17-66.pdf:1: sediment plume modelling (document reference PC1084-RHD-SB-EN-RP-EV-1100), on page 8 it
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1137-MLA.2020.00506.2 South Bank Quay Marine Licence Variation 2 RFI 17-66.pdf:3:The Hydrodynamic and Sediment Plume Modelling report (Royal HaskoningDHV, 2022) submitted in
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1137-MLA.2020.00506.2 South Bank Quay Marine Licence Variation 2 RFI 17-66.pdf:3:Hydrodynamic and Sediment Plume Modelling report (Royal HaskoningDHV, 2022). As such, the model
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1137-MLA.2020.00506.2 South Bank Quay Marine Licence Variation 2 RFI 17-66.pdf:3:conclusions presented within the Hydrodynamic and Sediment Plume Modelling report remain valid for
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1137-MLA.2020.00506.2 South Bank Quay Marine Licence Variation 2 RFI 17-66.pdf:4:OSPAR material. As noted in Section 2.4, the Hydrodynamic and Sediment Plume Modelling report (Royal
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1137-MLA.2020.00506.2 South Bank Quay Marine Licence Variation 2 RFI 17-66.pdf:4:reason it is considered that the sediment plume modelling presented within the Hydrodynamic and
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1137-MLA.2020.00506.2 South Bank Quay Marine Licence Variation 2 RFI 17-66.pdf:4:Sediment Plume Modelling report submitted in support of MLV1 remains valid and applicable for MLV2
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1137-MLA.2020.00506.2 South Bank Quay Marine Licence Variation 2 RFI 17-66.pdf:5:and Sediment Plume Modelling report (Royal HaskoningDHV, 2022). Whilst MLV2 requests an increase
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1137-MLA.2020.00506.2 South Bank Quay Marine Licence Variation 2 RFI 17-66.pdf:5:Sediment Plume Modelling report. As such, there is no change to the required durations of dredging as
MLA_2020_00506-PC1084-RHD-SB-EN-NT-EV-1137-MLA.2020.00506.2 South Bank Quay Marine Licence Variation 2 RFI 17-66.pdf:6:Royal HaskoningDHV (2022) South Bank Quay Technical Note: Hydrodynamic and Sediment Plume
MLA_2020_00506-Licence Document (Marine)-45.pdf:15: To restrict suspended sediment plumes to one side of the estuary at a time, in order to reduce loss of tern foraging habitat.
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:2: Dredging must be limited to working on one side of plumes to one side of the estuary
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:2:to migratory fish given that Environment Agency guidance recommends that the limit of any plume should
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:2:more commonly applied to temperature plumes, the Environment Agency has stated on previous projects
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:2:area of the estuary impacted by any sediment plumes resulting from dredging activities therefore this
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:2:dredging associated with the South Bank project that sediment suspended within the dredging plumes will
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:3:Linked to the relatively limited extent of the sediment plume, the EIA Report (Royal HaskoningDHV, 2020)
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:4:summarise, it is predicted that whilst the sediment plumes could combine to cover a larger area of the
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:4:extent of the cross-sectional area of the estuary as plume predictions indicate narrow plumes following
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:5:dredge plumes tend to be narrow and follow tidal flows thus indicating dredging on one side of the estuary
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:6:sensitive to dredging related sediment plumes.
PC1084-RHD-SB-XX-NT-Z-0001-South Bank SSC monitoring plan V3.pdf:8:Based on the predicted plume modelling output, the monitoring buoys are proposed to be positioned as
MLA_2020_00506-Licence Document (Marine)-58.pdf:16: To restrict suspended sediment plumes to one side of the estuary at a time, in order to reduce loss of tern foraging habitat.
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:The capital dredging of the river and the offshore disposal of dredged sediments both will cause plumes of
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:sediment to form. The plume effects arising from the river dredging are characterised by a short-lived
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:following hours. Since the dredging is a near-continuous operation, the plume effects will be observed
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected from the offshore
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:magnitude over a few hours after disposal. Deposition thicknesses of sediment from the plumes on the river
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:12:exceeding water quality standards was deemed to be low. Additionally, sediment plume modelling shows
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:12:resuspension of sediments. Such measures include dredging in long strips to ensure the plume is located
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:13:scheme footprint and the results of the hydrodynamic and sediment plume modelling, an impact of minor
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:20:Based on the findings of hydrodynamic and sedimentary plume modelling, the disposal of dredged material
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:61:from the proposed dredging and disposal activity by coupling a sediment plume model built in MIKE21-MT
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:63:hydrodynamic and sedimentary regime assessment (particularly the plume dispersion modelling to
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:65:sediment plume modelling will, however, be used to inform impacts to water quality as a result of the
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:130:plume modelling report
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:131:Hydro-dynamic and sedimentary plume modelling
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:139: a sediment plume model built in MIKE3-MT software. The sediment plume model was run for the entire
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:193:plume dispersion model are described in this section.
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:197:The following assumptions have been made for the simulation of sediment plumes arising from dredging
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:200: to note that this type of figure does not represent a plume or deposition that would occur at any one
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:200: point in time (such plumes or deposition are shown in the animated timestep plots). Rather, this
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:200: affected by a plume or deposition at some point during the 4-months of dredging or disposal
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:202:although: (i) the lateral extent of the plume (at low concentrations) becomes slightly greater; (ii) the extent
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:202:of the plume across the river channel becomes wider; and (iii) at times two plumes are created by the in-
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:203:that during Stage 3 of the dredging, the maximum plume extent and maximum SSC values within the plume
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:203:are much lower than experienced during both Stage 1 and 2 of the dredging (note the slight plume shown
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:203:commences). During Stage 3, the maximum extent of the plume is confined to within the length of the
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:204:that during Stage 4 of the dredging, the plume is created at the turning circle and along parts of the north
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:205:and that during the 4 months of dredging, all plume effects are confined to within the river reaches that
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:205:Furthermore, all plumes associated with dredging of the berthing pocket and river channel in the vicinity of
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:205:plumes associated with dredging of the turning circle are confined to the left bank (north of centre line)
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:205:No plume effects (and by implication no deposition effects) of a significant level above background values
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:207:the plumes created by river dredging. It can be seen that much of the sediment falls to the bed within the
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:207:that is affected by the zone of influence from the sediment plumes.
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:208:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:208:single release point and the potential for coalescence of subsequent depositional plumes is greatest. In
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:208:a few km of the upstream and downstream boundaries. At the extremities of the plume extent, there are
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:208:sediment plume for this worst case. It can be seen that much of the sediment falls to the bed within the
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:208:similar zone to the sediment plume. In reality, disposals will be at different points within the licensed area,
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:210:The river dredging and offshore disposal activities will both cause plumes of sediment to form close to the
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:210:release point of material into the water column. These plumes will disperse under wave and current action
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:210:Once a plume is generated, the highest SSC values will be recorded at the point of river dredging or offshore
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:advected away from the point of release by the prevailing currents. At the peripheries of each plume, the
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:working in parallel, there could be instances where two separately formed plumes coalesce to form one
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:(spatially) larger plume. However, the same principles of dispersion by prevailing currents applies, with
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:The plume effects arising from the river dredging are characterised by a short-lived localised increase in
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:plume effects will be observed throughout much the 4-month period, but at varying extents during the four
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:different stages. During Stages 1-3 the dredging-related plume effects will be largely confined to the channel
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:During Stage 4 the dredging-related plume effects will be largely confined to the channel areas north of the
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:areas covering the same spatial extent as the sediment plumes. Where this occurs in the river channel or
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected by tidal currents
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part2-4.pdf:385: would be supported through the use of divers. There is the possibility of sediment plumes
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part2-4.pdf:386:If your activity uses or releases chemicals (for example contaminants above action level 1.There is the possibility of sediment plumes during the
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part2-4.pdf:387:outside the estuary but could delay or prevent fish There is the possibility of sediment plumes during the dredging works. Possibility of
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part2-4.pdf:388: There is the possibility of sediment plumes during the dredging works
MLA_2020_00506-NE formal response to SBW MLA, 29.01.21 (1)-12.pdf:4: To restrict suspended sediment plumes to one side of the estuary at a time, and
MLA_2020_00506-NE formal response to SBW MLA, 29.01.21 (1)-12.pdf:6: To restrict suspended sediment plumes to one side of the estuary at a time, in
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-31.pdf:14:The tool requires the input of predicted suspended solids concentrations arising from the dredge plume. For
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-31.pdf:14:predicted to last for a duration of approximately four weeks. The likely plume extent during this phase is
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-31.pdf:16:uplift column in Appendix 2). It can be seen in Figure 2.2 that the suspended sediment plume is predicted
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-31.pdf:17:However, sediment plume modelling does not predict long term and large scale extents of elevated
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-31.pdf:27:suspended sediment during dredging is expected to be in the form of a narrow plume within the river, which
MLA_2020_00506-PC1084-RHD-ZZ-XX-RP-Z-1115_South Bank Quay supplementary report-31.pdf:45:parameters, the short term nature of the sediment plume and limited spatial extent would limit any EQS
R-2022-0342-CD-10035117-AUK-XX-XX-RP-ZZ-0395-03-GE Plot.pdf:26:ongoing sources of ground gases. In addition, as hydrocarbon contamination or a distinct NAPL plume within
R-2023-0246-RMM-TV_ERF_Air_Quality_Emissions_Modelling_Report.pdf:26: increased turbulence can cause greater plume mixing.
R-2023-0246-RMM-TV_ERF_Air_Quality_Emissions_Modelling_Report.pdf:26: • The rise and trajectory of the plume may be depressed slightly by the flow distortion. This
R-2023-0246-RMM-TV_ERF_Air_Quality_Emissions_Modelling_Report.pdf:34: the quantity of pollutants emitted but also to reduce the buoyancy of the plume due to momentum.
R-2020-0685-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:The capital dredging of the river and the offshore disposal of dredged sediments both will cause plumes of
R-2020-0685-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:sediment to form. The plume effects arising from the river dredging are characterised by a short-lived
R-2020-0685-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:following hours. Since the dredging is a near-continuous operation, the plume effects will be observed
R-2020-0685-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
R-2020-0685-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected from the offshore
R-2020-0685-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:magnitude over a few hours after disposal. Deposition thicknesses of sediment from the plumes on the river
R-2020-0685-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:12:exceeding water quality standards was deemed to be low. Additionally, sediment plume modelling shows
R-2020-0685-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:12:resuspension of sediments. Such measures include dredging in long strips to ensure the plume is located
R-2020-0685-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:13:scheme footprint and the results of the hydrodynamic and sediment plume modelling, an impact of minor
R-2020-0685-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:20:Based on the findings of hydrodynamic and sedimentary plume modelling, the disposal of dredged material
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:2: the findings of hydrodynamic and sedimentary plume
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:2: sediment and create smothering effects / turbidity / sediment plumes.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:3:are predicted to occur (e.g. sediment plumes generated during capital dredging and effects on tidal currents
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:Capital dredging would result in the creation of sediment plumes. To consider the potential extent and
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:In all tidal conditions modelled, the lateral extent of the plume across the river channel is very narrow and
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:the magnitude of concentrations within the plume beyond a few hundred metres from the point of release is
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:in the order of 10 - 20mg/l and in the extremities of the plume, reduces further to concentrations 0-10mg/l
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:Results for this stage were similar to those in Stage 1 but with separate plumes created by the different
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:dredgers. At some points in the cycle, areas of these initially separate plumes combine as they move
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:The maximum concentrations and the spatial extents of the plume arising from Stage 3 of the dredging are
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:and the production rate of dredging is notably lower. Figure 7.5 shows an example plume during Stage 3
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:Again, peak concentrations close to the dredger are shown in the plume modelling output. On the ebb
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:phase, the plume can extend at low concentrations (<30mg/l) along the jetties of the Oil Terminal towards
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:17:Figure 7. 3 Plume of suspended sediment concentrations arising from dredging activities during Stage 2
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:18:Figure 7. 4 Plume arising from dredging activities during Stage 1 of the capital dredge (release from the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:19:Figure 7. 5 Plume of suspended sediment concentrations arising from dredging activities during Stage
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:20:Figure 7.6 Plume of enhanced suspended sediment concentrations arising from dredging activities
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:21:sediment plume is not predicted to reach The Gares water quality monitoring point, no effects on the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:21:The relatively limited nature of the plume extents predicted for the proposed capital dredging indicates that
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:25:Additionally, information from sediment plume modelling (see Section 7.5.1) indicates that only the Smiths
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:1:WFD water body (approximately 6.3km, see Figure 28.1) and plume modelling results described in Section
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:7: measures identified for the Tees estuary. habitats located within sediment plumes created
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11:Capital dredging within the river would result in sediment plumes. To consider the potential extent and
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: BHD working to dredge the In all tidal conditions modelled, the lateral extent of the plume across the river channel
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: upper soft material in the is very narrow and the magnitude of concentrations within the plume beyond a few
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: channel. extremities of the plume, reduces further to concentrations 0-10mg/l.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: 2 Results for this stage were similar to those in Stage 1 but with separate plumes
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: separate plumes combine as they move upstream and downstream according to the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: 3 BHD working to dredge the The maximum concentrations and the spatial extents of the plume arising from Stage
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: channel. notably lower. Plume very small and located close to the dredging activity.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: 4 Again, peak concentrations close to the dredger are shown in the plume modelling
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: output. On the ebb phase, the plume can extend at low concentrations (<30mg/l)
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:13:represent a more conservative scenario, as sediment plume modelling outlined above indicates relatively
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:13:limited plume extents for the majority of the capital dredge for the proposed scheme.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:14:Additionally, sediment plume results for Smiths Dock monitoring point (point 3) indicated only temporary
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:14:be temporary which would disperse following cessation of the works. Plume extents during each of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:16:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:17:zone of influence from the sediment plumes. As a result, a deterioration in ecological class status is not
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:18:peak migratory season, when a sediment plume creating a ‘barrier’ effect could cause a significant disruption
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:18:extent and impact of the plume. This allows a passage through which migratory fish will be able to move
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:18: dredging along the axis of the river to ensure the plumes are
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:23: • Cumulative effects of sediment plumes and associated effects on water quality and fish
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:24:Section 27 considers the potential cumulative effects of the proposed schemes on sediment plumes and
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:24:marine water quality. To summarise, whilst the sediment plumes could combine to cover a larger area of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:24:plumes spreading across the width of the channel. Additionally, due to navigational safety, it is unlikely that
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:28:strips thus limiting the plume extent. As a result, non- temporary effects on water quality and associated
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:29:would be sediment plumes associated with dredging simultaneously. However, on further consideration,
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:As the offshore disposal commences, a plume of sediment would be generated with the greatest
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:concentrations predicted at the end of the discharge period. The sediment plume is predicted to increase
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:At 30 minutes after cessation of discharge, the plume is less than 250mg/l at its localised centre, reducing
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of less than
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:commences and starts to form its own sediment plume, the initial plume has moved sufficiently far from its
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:point of release that it does not coalesce with the new plume and, by this time, is less than 40mg/l in SSC
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:at the magnitudes presented. The original plume continues to disperse such that after 4 hours and 25
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:At times when the release is around slack water, the plume tends to reside closer to the point of release for
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:However, when this occurs the concentration in the plume reduces readily because more material falls to
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:2:Based on the modelled effects of the sediment plume at the Tees Bay C disposal site described above, it is
R-2020-0685-ESM-OFFICER REPORT.pdf:20:relatively limited nature of the plume extents predicted for the proposed
R-2020-0685-ESM-OFFICER REPORT.pdf:44:reduce both the extent and impact of the dredged plume, as any plume
R-2020-0685-ESM-OFFICER REPORT.pdf:92:plume at the disposal site concludes that there is limited potential for an
R-2020-0685-ESM-EIA_Scoping_Response_EIA201900017_FINAL.pdf:11:create smothering effects/turbidity/sediment plumes, thereby damaging benthic
R-2020-0685-ESM-Appendix 16_WFD scoping tables.pdf:2: would be supported through the use of divers. There is the possibility of sediment plumes
R-2020-0685-ESM-Appendix 16_WFD scoping tables.pdf:3:If your activity uses or releases chemicals (for example contaminants above action level 1.There is the possibility of sediment plumes during the
R-2020-0685-ESM-Appendix 16_WFD scoping tables.pdf:4:outside the estuary but could delay or prevent fish There is the possibility of sediment plumes during the dredging works. Possibility of
R-2020-0685-ESM-Appendix 16_WFD scoping tables.pdf:5: There is the possibility of sediment plumes during the dredging works
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:1:Hydro-dynamic and sedimentary plume modelling
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:9: a sediment plume model built in MIKE3-MT software. The sediment plume model was run for the entire
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:63:plume dispersion model are described in this section.
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:67:The following assumptions have been made for the simulation of sediment plumes arising from dredging
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:70: to note that this type of figure does not represent a plume or deposition that would occur at any one
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:70: point in time (such plumes or deposition are shown in the animated timestep plots). Rather, this
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:70: affected by a plume or deposition at some point during the 4-months of dredging or disposal
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:72:although: (i) the lateral extent of the plume (at low concentrations) becomes slightly greater; (ii) the extent
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:72:of the plume across the river channel becomes wider; and (iii) at times two plumes are created by the in-
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:73:that during Stage 3 of the dredging, the maximum plume extent and maximum SSC values within the plume
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:73:are much lower than experienced during both Stage 1 and 2 of the dredging (note the slight plume shown
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:73:commences). During Stage 3, the maximum extent of the plume is confined to within the length of the
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:74:that during Stage 4 of the dredging, the plume is created at the turning circle and along parts of the north
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:75:and that during the 4 months of dredging, all plume effects are confined to within the river reaches that
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:75:Furthermore, all plumes associated with dredging of the berthing pocket and river channel in the vicinity of
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:75:plumes associated with dredging of the turning circle are confined to the left bank (north of centre line)
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:75:No plume effects (and by implication no deposition effects) of a significant level above background values
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:77:the plumes created by river dredging. It can be seen that much of the sediment falls to the bed within the
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:77:that is affected by the zone of influence from the sediment plumes.
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:78:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:78:single release point and the potential for coalescence of subsequent depositional plumes is greatest. In
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:78:a few km of the upstream and downstream boundaries. At the extremities of the plume extent, there are
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:78:sediment plume for this worst case. It can be seen that much of the sediment falls to the bed within the
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:78:similar zone to the sediment plume. In reality, disposals will be at different points within the licensed area,
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:80:The river dredging and offshore disposal activities will both cause plumes of sediment to form close to the
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:80:release point of material into the water column. These plumes will disperse under wave and current action
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:80:Once a plume is generated, the highest SSC values will be recorded at the point of river dredging or offshore
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:advected away from the point of release by the prevailing currents. At the peripheries of each plume, the
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:working in parallel, there could be instances where two separately formed plumes coalesce to form one
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:(spatially) larger plume. However, the same principles of dispersion by prevailing currents applies, with
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:The plume effects arising from the river dredging are characterised by a short-lived localised increase in
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:plume effects will be observed throughout much the 4-month period, but at varying extents during the four
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:different stages. During Stages 1-3 the dredging-related plume effects will be largely confined to the channel
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:During Stage 4 the dredging-related plume effects will be largely confined to the channel areas north of the
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:areas covering the same spatial extent as the sediment plumes. Where this occurs in the river channel or
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
R-2020-0685-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected by tidal currents
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_20. Flood risk and coastal defence.pdf:4:well as hydrodynamic and sedimentary plume modelling reported in Section 6.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:4:hydrodynamic and sedimentary plume modelling undertaken. This section excludes consideration of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:20:In general, sediment plumes induced by dredging are considered to pose only a limited risk to water quality
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:20:dredging periods. The sediment plume generated by dredging would likely be dispersed by tidal currents
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:immediate vicinity of the dredger. Sediment plume modelling predicts different plume extents and
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:cases, the sediment plume is predicted to be very narrow within the river, with the phase of dredging with
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:extremities of the plume.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:All plumes associated with different stages of dredging in the vicinity of the proposed new quay are confined
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:to the southern bank of the river, whilst all plumes associated with dredging of the turning circle are confined
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:to the northern bank. No plume effects of a significant level above background values are anticipated to
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:The sediment plume modelling reported within Section 6 also extracted time series plots of changes in SSC
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:22:from the sediment plumes.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:22:(deposition) from the sediment plume model were extracted at a series of points within the affected river
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:5: Environmental Statement. modelling and modelling of sediment plume
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:7: Environmental Statement. 2014 modelling and modelling of sediment plume released from
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:10: • Sediment plume modelling: The updated and verified 3D Tees Estuary Tidal Model was used to
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:10: coupling with a sediment plume model built in MIKE21-MT software. The sediment plume model
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:41:offshore site will both result in sediment plumes. These effects have been investigated using numerical
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:41:changes in bed thickness when the suspended sediment falls from the plume to become deposited on the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42: represent a plume that would occur at any one point in time (such plumes are shown in the timestep
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42: become affected by a plume at some point during the dredging or disposal activities (in some areas
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:or river channel). To illustrate this, Figures 6.32 – 6.35 shows the maximum extent of the plume during a
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:When the dredger is at the south-western end of the transect, the maximum spatial extent of the plume on
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:Middlesbrough Dock. When the dredger is at the north-eastern end of the transect, the extent of the plume
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:new quay. However, in all cases considered, the lateral extent of the plume across the river channel is very
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:narrow and the magnitude of the SSC within the plume beyond a few hundred metres from the point of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:release is of the order of 10 to 20mg/l and in the extremities of the plume reduces further to the same order
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:43:Figure 6.32 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:44:Figure 6.33 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:45:Figure 6.34 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:46:Figure 6.35 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:47:Results from this scenario are broadly similar to those from Stage 1, but now separate plumes are created
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:47:plumes can coalesce and collectively occupy around half the width of the river channel as they move
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:48:Figure 6.37 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:49:Figure 6.38 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:49:plume (at low concentrations) becomes slightly greater; (ii) the extent of the plume across the river channel
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:49:becomes wider; and (iii) at times two plumes are created by the in-parallel dredging activities. Despite these
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:50:Figures 6.40 – 6.43 shows the maximum extent of the plume during a release from the south-western corner
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:50:and the spatial extents of the plume arising from Stage 3 of the dredging are much lower than those
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:51:Figure 6.40 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:52:Figure 6.41 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:53:Figure 6.42 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:54:Figure 6.43 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:54:the maximum plume extent and maximum SSC values within the plume are much lower than experienced
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:54:during both Stages 1 and 2 of the dredging (note the slight plume shown in the mid channel is a remnant of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:54:maximum extent of the plume is confined to within the length of the proposed quay and covers only a very
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:55:phase of the tide). Figure 6.45 and 6.46 shows the maximum extent of the plume during a release from the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:55:On the ebb phase, the plume can extend at low (<30mg/l) concentrations along the jetties of the Oil Terminal
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:55:Depot. Under no conditions does the plume enter Tees Dock at any significant concentration.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:56:Figure 6.45 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:57:Figure 6.46 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:57:the plume is created at the turning circle and along parts of the north bank of the river. As with previous
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:58:The sediment plumes that arise from the four stages of the dredging could potentially affect areas of riverbed
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:58:that during the predicted four months of dredging, all individual or coalesced plume effects are confined to
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:58:Furthermore, all plumes associated with dredging of the berthing pocket and river channel in the vicinity of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:58:whilst all plumes associated with dredging of the turning circle are confined to the left bank (north of centre
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:59:No plume effects (and by implication no deposition effects) of a significant level above background values
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:60:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:60:zone of influence from the sediment plumes.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:61:Within this maximum zone of influence from sediment plumes and bed deposition, the following receptors
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:62:elevations in SSC drop rapidly after each dredging plume has dispersed, and return to baseline levels at
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:the 10-minute duration of disposal activity; and (iii) at selected intervals thereafter until the initial plume
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. It can then
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:This plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:At 30 minutes after cessation of discharge (Plot F), the plume is less than 250mg/l at its localised centre,
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:phase of the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:activity commences and starts to form its own sediment plume (Plot H), the initial plume has moved
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:sufficiently far from its point of release that it does not coalesce with the new plume and, by this time, is less
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:not visible in the plots at the magnitudes presented. The original plume continues to disperse such that
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:although when the discharge is made during the flooding tide, the plume moves in a south-easterly direction,
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:along the axis of principal tidal flows. At times when the release is around slack water, the plume tends to
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:west or south-east, respectively). However, when this occurs the concentration in the plume reduces readily
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:69:Figure 6.60 Plume of enhanced SSCs arising from disposal activities during Stage 1 of the capital
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:from the BHD (although the time intervals are greater), the initial plume has greater SSC values at its centre,
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:case for maximum SSC), the plume resides in spatial extent around the point of release during the slack
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:plume has started to move towards the south-east through advection by the flood tidal currents, and the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:release point (Plot F). At this point in time, the TSHD plume has further reduced in peak concentration to
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:around 200mg/l. Some 30 minutes later, the TSHD plume and subsequent BHD plume have fully coalesced,
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:with two peaks in concentration; the original TSHD plume has a peak now around 100mg/l locally at its
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:centre whilst the more recently formed (but smaller) BHD plume has a peak SSC value at its centre of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:previous TSHD release, the now fully coalesced plume has a peak SSC of around 100mg/l very locally and
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:plume remains present a further 45 minutes later, the original coalesced plume is considerably smaller in
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:successive disposal events, any coalescence of subsequent plumes would continue to result in only
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:coalescence of successive plumes at significant concentrations or for long durations is very low even during
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:71:Figure 6.61 Plume of enhanced SSCs arising from disposal activities during Stage 2 of the capital
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:72:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. The
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:72:plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:72:The plumes associated with Stage 3 disposal activities are generally lower in concentration than those for
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:72:Indeed, the plume arising from Stage 3 disposal activities fully disperses before the next subsequent
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:72:in this offshore area). Due to this, there is no possibility of plumes coalescing from Stage 3 disposal
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:73:Figure 6.4 Plume of enhanced SSCs arising from disposal activities during Stage 3 of the capital
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:Like during Stage 2, there is potential for the plume from a TSHD discharge to coalesce with a preceding or
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:Plot A shows the residual plume from a TSHD disposal some 5 minutes before the commencement of a
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:separate plumes at 45 minutes after cessation of the BHD discharge. A further 30 minutes later, another
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:TSHD release occurs within the previous BHD plume extent (Plot E). Peak concentrations from the TSHD
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:plume has widely dispersed, a further BHD release is made some 50 minutes later, again within the previous
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:(now coalesced) plumes. Despite this coalesced plume now containing elements of three separate
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:the residual plume shown in Plot A coalesce with the ‘three-release’ plume (Plot G), although the SSC
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:values at the point of overlap are very low (~10mg/l). Around 55 minutes later, the plume is now mostly
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:disposal site, leading to coalescence of subsequent plumes, the resulting temporary, short duration effects
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:75:Figure 6.5 Plume of enhanced SSCs arising from disposal activities during Stage 4 of the capital
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:76:for coalescence of subsequent plumes is greatest. In reality, subsequent disposals will be at different parts
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:76:At the extremities of the plume extent, there are wide zones of relatively low SSC values (<100mg/l).
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:76:sediment plume associated with one release event (this example being from Stage 1). It can be seen that
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:76:is negligible, whilst to the north it covers a similar zone to the sediment plume for this disposal event, which
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:80:the northern and southern boundaries (Figure 6.68). This correlates to the areas where a plume will extend
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:The river dredging and offshore disposal activities will both cause plumes of sediment to form close to the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:release point of material into the water column. These plumes will disperse under wave and current action
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:Once a plume is generated, the highest SSC values will be recorded at the point of river dredging or offshore
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:advected away from the point of release by the prevailing currents. At the peripheries of each plume, the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:working in parallel, there could be instances where two separately formed plumes coalesce to form one
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:(spatially) larger plume. However, the same principles of dispersion by prevailing currents applies, with
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:The plume effects arising from the river dredging are characterised by a short-lived localised increase in
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:plume effects will be observed throughout much of the approximately four-month period, but at varying
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:extents during the four different stages. During Stages 1-3 the dredging-related plume effects will be largely
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:Dock and Tees Dock. During Stage 4 the dredging-related plume effects will be largely confined to the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:very minor magnitudes, in areas covering the same spatial extent as the sediment plumes. Where this
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected by tidal currents
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:27:In summary, the largest sediment plumes are likely to arise during Stage 2 of the dredging (i.e. BHD and
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:27:(it is not a sediment plume, rather a combined zone of influence). The sediment dispersion modelling of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:27:distance from the dredging vessel, both laterally and along the line of the vessel, with plumes diminishing
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:27:of this assessment, the sediment plume may be regarded as representing a temporary loss of foraging
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:28:terns do not forage to any significant extent within the predicted range of the sediment plume. Likewise, the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:28:England, 2018a), and the area likely to be affected by the sediment plume at any one time represents around
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:28:available even if the plume does result in temporary occlusion from the affected area. Furthermore, SSC
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:29:and the other stages of the dredge campaign would result in a smaller plume than that described for Stage
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:29: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:29: plume generated by operations is predicted to collectively occupy around half the width of the river
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:29:With the implementation of the above mitigation measure, the modelled plume would only occupy half of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_11. Terrestrial ecology.pdf:13: hydrodynamic and sedimentary plume effects would not extend to
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_11. Terrestrial ecology.pdf:14: hydrodynamic and sedimentary plume effects would not extend to
R-2020-0685-ESM-61586 Quay Planning Statement 09-11-20.pdf:24: sediment plume modelling, an impact of minor adverse significance is predicted with regard to
R-2020-0685-ESM-61586 Quay Planning Statement 09-11-20.pdf:30: Additionally, sediment plume modelling shows relatively limited areas of high suspended solids
R-2020-0685-ESM-61586 Quay Planning Statement 09-11-20.pdf:30: dredging in long strips to ensure the plume is located only on one side of the channel at a time
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_1. Introduction.pdf:8:5 Hydrodynamic and sedimentary plume modelling report
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_30. References.pdf:6:sediment plumes arising from dredging. Construction Industry Research and Information Association
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:1: influencing the same area as affected by the sediment plume); and,
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:2:the basis of the potential extent of the dredging and disposal plumes.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:11:All projects scoped into the CIA involve will involve capital dredging. This activity will create a plume of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:11:The extent of the sediment plume created by capital dredging is heavily dependent on the dredging plant
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:important to note that figures showing the “maximum extent of sediment plume dispersion and deposition”
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:do not represent a plume that would occur at any one point in time (such plumes are shown in the timestep
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:affected by a plume at some point during the dredging or disposal activities (in some areas this will be on a
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:Consequently, for the purposes of this CIA, the maximum zones of influence of sediment plume dispersion
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:of sediment plume dispersion and deposition onto the river and/or seabed during capital dredging
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:sediment in the water column was predicted to be in close proximity to the dredger, with plume dispersion
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:resulting in a significantly reduced concentration of suspended sediment beyond the source of the plume.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:material will be re-dredged as part of the capital works for each scheme. At the peripheries of each plume,
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:13:(right) as a result of the proposed scheme [Note: plots show sediment plume impacts arising from dredging
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:17:addition, the predictions made for each project represent sediment plume dispersion under specific tidal
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:17:where sediment plumes combine at peak concentration (as predicted by the EIA studies for each project)
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:17:at any location. Additionally, mitigation is outlined for all three schemes which would reduce plume extents
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:17:proposed scheme, it is considered unlikely that the plumes would overlap. As a result, there may be a
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:17:additional mitigation measures are identified to reduce any resulting sediment plume as far as possible and
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:18:plumes.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:18:(deposition) from the sediment plume model were extracted at a series of points within the affected river
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:24:plumes occupy only half of the river cross section) has also been proposed for the NGCT project. For the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:24:England, 2018a), the area affected even by the combined plumes is likely to be low (for example, should
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:24:dredging plumes together will still affect only around 0.5% of the SPA subtidal habitat (Royal
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:24:HaskoningDHV, 2015)). However, the additive effect of the sediment plumes from separate dredging
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:25:sediment plumes may deter such species from migrating to and from spawning sites.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:25:the respective sediment plumes could result in an additive effect, as demonstrated in Figures 27.1 to 27.3.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:25:Significantly, the effect of a combined plume is not likely to result in a different behavioural response in fish
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:25:compared with the effect of the projects in isolation, although the increased plume footprint may increase
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:25:of the sediment plumes from separate dredging campaigns cannot be completely avoided if the campaigns
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:9:proposed scheme nor the modelled extent of the maximum-expected sediment plume from the capital
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:9:influence of the proposed scheme will be determined by the sediment plume during dredging activities.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:22:The capital dredging of the river will cause plumes of sediment to form. The plume effects arising from the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:22:operation, the plume effects will be observed throughout much of the approximately five-month period, but
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:22:of sediment from the plumes on the river or seabed will be very small.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:25:requires use of TSHD and BHD on soft sediment in the channel and berth pocket) will result in plumes of
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:25:with plumes diminishing typically to levels of <30 mg/l but often <10mg/l at a distance of no more than a few
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:25:England, 2018a). The area affected by the sediment plume generated from proposed dredging, though
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:30:In terms of intra-project effects on foraging common terns, the zone of influence from the sediment plume
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:30:of the area would not be increased since the plume is considered to be the most far-reaching effect on tern
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:33:Effects on fish may be compounded by the combined sediment plumes of other projects or plans that may
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:34:An interaction between the sediment plumes would only occur in the unlikely event that the capital dredging
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:34:Plumes from each project would be temporary and short-lived. The same applies for the Anglo American
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:34:combined plumes is expected to be minor.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:34:sediment plumes occupy only half of the river cross section) has also been proposed for the NGCT project.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:36:The zone of influence from predicted sediment plumes (including the combined plumes from the proposed
R-2020-0685-ESM-PC1084-RHD-SB-EN-NT-EV-1106_Appendix 2_Scoping note.pdf:11:from the proposed dredging and disposal activity by coupling a sediment plume model built in MIKE21-MT
R-2020-0685-ESM-PC1084-RHD-SB-EN-NT-EV-1106_Appendix 2_Scoping note.pdf:13:hydrodynamic and sedimentary regime assessment (particularly the plume dispersion modelling to
R-2020-0685-ESM-PC1084-RHD-SB-EN-NT-EV-1106_Appendix 2_Scoping note.pdf:15:sediment plume modelling will, however, be used to inform impacts to water quality as a result of the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:3:informed by the hydrodynamic and sedimentary plume modelling undertaken, as well as the understanding
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:12:details of the increase in SSC, including the visual output of sediment plume modelling for the capital
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:13:sediment plume creating a ‘barrier’ effect could cause a significant disruption to the annual migration pattern,
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:13:during a period of very hot and dry weather. Modelling of the sediment plume during capital dredging
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14:vessel, both laterally and along the line of the vessel. The periphery of the plume (10 to 20 mg/l) extends
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14:The cross section of the river channel affected by the plume is particularly relevant when considering
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14:narrow plume along the axis of the river.
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14:period. However, while unlikely, it has to be taken into account that sediment plumes encompassing the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14: plume generated by operations is predicted to remain on the same side of the river as the
R-2020-0685-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14:Mitigation of the plume effects by reducing the size of the TSHD, and thus reducing the rate of overflow, is
R-2021-0855-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02_SB_DQRA_Part1.pdf:21:plume located north towards the River Tees from the SBA_AUK_BH110 area is present. The NAPL was found
R-2021-0855-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02_SB_DQRA_Part1.pdf:28:groundwater plume originating from a localised source. Further higher concentrations were measured in the
R-2021-0855-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02_SB_DQRA_Part1.pdf:29:In groundwater, a more distinct plume is evident in the vicinity of the SBCO area and southern SBA boundary,
R-2021-0855-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02_SB_DQRA_Part1.pdf:40:Although the distribution of free and total cyanide does not form such an apparent plume-like distribution in
R-2021-0855-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02_SB_DQRA_Part1.pdf:41:area and maybe associated with the plume.
R-2022-0205-SC-Bran Sands EIA Screening Request_FINAL reduced signed.pdf:42: resuspension and deposition of sediments and potentially formation of sediment plumes
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-02-LWoW_DQRA.pdf:845:Plume thickness 11.55 Assumed to be equal to the saturated aquifer thickness
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-02-LWoW_DQRA.pdf:853: Initial contaminant concentration in groundwater at plume core C0 1.00E+00 mg/l 0 10 20 30 40 50 60 15.0 2.41E-01
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-02-LWoW_DQRA.pdf:853: Width of plume in aquifer at source (perpendicular to flow) Sz 6.50E+02 m 22.5 1.18E-01
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-02-LWoW_DQRA.pdf:853: Plume thickness at source Sy 1.16E+01 m Dispersivity 0 Note graph assumes plume disperses vertically in one direction only. An alternative 25.0 9.31E-02
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-02-LWoW_DQRA.pdf:853: Saturated aquifer thickness da 1.16E+01 m Define dispersivity (click brown cell and use pull down list) Dispersivi 1 solution assuming the centre of the plume is located at the mid-depth of the aquifer is 27.5 7.34E-02
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-02-LWoW_DQRA.pdf:854: Initial contaminant concentration in groundwater at plume core C0 1.00E+00 mg/l 00 1050 20 100 30 150 40 200 50 250
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-02-LWoW_DQRA.pdf:854: Width of plume in aquifer at source (perpendicular to flow) Sz 6.50E+02 m 90.0 3.66E-03
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-02-LWoW_DQRA.pdf:854: Plume thickness at source Sy 1.16E+01 m Dispersivit 0 Note graph assumes plume disperses vertically in one direction only. An alternative 100.0 1.96E-03
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-02-LWoW_DQRA.pdf:854: Saturated aquifer thickness da 1.16E+01 m Define dispersivity (click brown cell and use pull down list) Dispersivi 1 solution assuming the centre of the plume is located at the mid-depth of the aquifer is 110.0 1.05E-03
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-03-LWoW_DQRA.pdf:975:Plume thickness 11.55 Assumed to be equal to the saturated aquifer thickness
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-03-LWoW_DQRA.pdf:983: Initial contaminant concentration in groundwater at plume core C0 1.00E+00 mg/l 0 10 20 30 40 50 60 15.0 2.41E-01
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-03-LWoW_DQRA.pdf:983: Width of plume in aquifer at source (perpendicular to flow) Sz 6.50E+02 m 22.5 1.18E-01
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-03-LWoW_DQRA.pdf:983: Plume thickness at source Sy 1.16E+01 m Dispersivity based on Xu0& EcksteinNote graph assumes plume disperses vertically in one direction only. An alternative
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-03-LWoW_DQRA.pdf:983: 1 0.1% of pathway length the centre of the plume is located at the mid-depth of the aquifer is 27.5 7.34E-02
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-03-LWoW_DQRA.pdf:984: Initial contaminant concentration in groundwater at plume core C0 1.00E+00 mg/l 00 1050 20 100 30 150 40 200 50 250
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-03-LWoW_DQRA.pdf:984: Width of plume in aquifer at source (perpendicular to flow) Sz 6.50E+02 m 90.0 3.66E-03
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-03-LWoW_DQRA.pdf:984: Plume thickness at source Sy 1.16E+01 m Dispersivity based on Xu 0
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-03-LWoW_DQRA.pdf:984: (1995)graph assumes plume disperses vertically in one direction only. An alternative 100.0 1.96E-03
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-03-LWoW_DQRA.pdf:984: Dispersivities 10%, 1%,10.1% of pathway length the centre of the plume is located at the mid-depth of the aquifer is 110.0 1.05E-03
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-01-Net_Zero_DQRA.pdf:175:Plume thickness 11.55 Assumed to be equal to the sat
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-01-Net_Zero_DQRA.pdf:183: Initial contaminant concentration in groundwater at plume core C0 1.00E+00 mg/l 0 10
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-01-Net_Zero_DQRA.pdf:183: Width of plume in aquifer at source (perpendicular to flow) Sz 6.50E+02 m
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-01-Net_Zero_DQRA.pdf:183: Plume thickness at source Sy 1.16E+01 m Dispersivit 0 Note graph assumes plume disp
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-01-Net_Zero_DQRA.pdf:184: Initial contaminant concentration in groundwater at plume core C0 1.00E+00 mg/l 00 1050
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-01-Net_Zero_DQRA.pdf:184: Width of plume in aquifer at source (perpendicular to flow) Sz 6.50E+02 m
R-2021-1048-FFM-10035117-AUK-XX-XX-RP-ZZ-0428-01-Net_Zero_DQRA.pdf:184: Plume thickness at source Sy 1.16E+01 m Dispersivity 0 Note graph assumes plume disp
R-2020-0357-OOM-South Industrial ES - Vol 2 - Chapter F - July 2020.pdf:8: • Visible dust plumes;
R-2020-0357-OOM-South Industrial ES - Vol 2 - Chapter L - July 2020.pdf:27: the power station and chimney stack, with plumes of steam emerging into the skyline. Nearby
R-2019-0767-OOM-2019s0951 - Energy Recovery Facility Environmental Statement.pdf:35: the condenser tubes, so there is no visible plume.
R-2019-0767-OOM-REP-1011778-AQ-CR-20200306-Grangetown Prairie Energy from Waste-AQA-R02.pdf:11:The potential for plume visibility has not been considered in this stage.
R-2019-0767-OOM-REP-1011778-AQ-CR-20200306-Grangetown Prairie Energy from Waste-AQA-R02.pdf:85:Entrainment of the plume into the wake of the buildings has been taken into account by including the buildings
R-2019-0767-OOM-Chapter 8 WFD Assessment.pdf:15: visible plume.
R-2019-0767-OOM-Chapter 8 WFD Assessment.pdf:32: o Visual monitoring to see if water colour has changed or if a plume is
R-2019-0767-OOM-20191201 ERF Planning DAS_Issued.pdf:10: cooled condenser has fans which draw air across the condenser tubes, so there is no visible plume.
R-2019-0767-OOM-Non Technical Summary_Final.pdf:5:condenser has fans which draw air across the condenser tubes, so there is no visible plume.
R-2020-0743-CD-10035117-AUK-XX-XX-RP-ZZ-0181-MPA_ROA and Strategy.pdf:47:plume dimensions) large treatment zones routinely accept waste types
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:3:7. ASSESSMENT OF AIR QUALITY IMPACTS - PLUME VISIBILITY 117
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:3: 7.1. Forecast Visible Plumes 117
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:5:Table 29: Predicted Visible Plumes 117
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:5:Table 30: 10-100th Percentile Plume Lengths 118
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:5:Table 31: Screening Criteria for Plume Visibility 119
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:11: • to assess plume visibility;
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:14: buildings, dry deposition fluctuations and visible plumes. The model results have been
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:14:2.1.3. ADMS 5.2 is a new generation Gaussian plume air dispersion model, which means that the
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:48: • plume visibility from the Installation;
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:50: occur when a plume from an elevated source affects airborne concentrations experienced
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34:7. ASSESSMENT OF AIR QUALITY IMPACTS - PLUME VISIBILITY
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34:7.1. Forecast Visible Plumes
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34:7.1.1. This section of the report describes the potential visible plume impacts from the
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: Installation’s A1 and A2 stack. A plume will become visible when water vapour in the plume
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: condenses to form small particles in the form of water droplets. A plume is defined as
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: “visible” if the liquid water content of the plume at the centreline exceeds 0.000015 kg/kg
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: and is defined to have grounded if the vertical spread of the plume is larger than the plume
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: the plume in kg/kg (i.e., the mass of water vapour per unit mass of dry release at the source)
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34:7.1.3. Plume visibility for the main stack was assessed for the 5 years of observed met data and
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: required for plume visibility calculation.
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34:7.1.4. The modelled lengths of visible vapour plumes are provided in Table 29 for all hours –
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: Table 29: Predicted Visible Plumes
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: Visible Plumes
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: Visible Plumes
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: visible plumes 73.83 78.77 80.82 73.64 70.11 36.40
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: visible plume 405.46 447.61 499.83 412.44 370.35 297.71
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34:7.1.5. The results of the plume visibility assessment concluded that visible plumes will only occur
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: for a maximum of 35% of the hours in a year. The maximum length of a visible plume from
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: the Installation is 499.83m. However, for the worst-case met year, average visible plumes
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34:7.1.6. It is also important to consider how often the plumes of varying length will be present for.
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:34: Table 30 provides the 10-100th Percentile plume lengths for each met year considered. All
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: Table 30: 10-100th Percentile Plume Lengths
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 10th Percentile Plume Length 0 0 0 0 0 0
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 20th Percentile Plume Length 0 0 0 0 0 0
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 30th Percentile Plume Length 0 0 0 0 0 0
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 40th Percentile Plume Length 0 0 0 0 0 0
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 50th Percentile Plume Length 0 0 0 0 0 0
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 60th Percentile Plume Length 0 0 0 0 0 0
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 70th Percentile Plume Length 9 9 16 10 14 0
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 80th Percentile Plume Length 39 47 54 42 43 0
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 85th Percentile Plume Length 59 67 73 61 62 0
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 90th Percentile Plume Length 89 90 98 87 87 19
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 95th Percentile Plume Length 141 139 144 137 135 42
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 98th Percentile Plume Length 202 216 215 202 195 68
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 99th Percentile Plume Length 251 266 267 241 238 92
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 100th Percentile Plume Length 405 448 500 412 370 298
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35:7.1.7. The results in Table 30 show that for 60% of all hours, no visible plume is forecast to occur.
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: When visible, the plume length is predicted to be short, with a maximum plume length of
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35:7.1.8. The plume is forecast to extend to a length of up to 144m for the 95th Percentile and, when
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: 2.12.) the visible plume would remain within the Installation’s boundary for the majority of
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: circa 90m to the north of the A1 and A2 emission points, the maximum visible plume,
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: regardless of plume direction, would remain within the Installation’s boundary 85% of the
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:35: stacks. Consequently, as demonstrated by the 99th Percentile in Table 30, the plume would
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36:7.1.11. In the absence of EA specific guidance on plume visibility, SEPA’s H1 guidance32, has been
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: used to assess the impact of plume visibility. The screening criteria used is provided in
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: Table 31: Screening Criteria for Plume Visibility
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: Insignificant • Plume length exceeds boundary less than 5% of daylight hours per year
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: Low • Plume length exceeds boundary less than 5% of daylight hours per year
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: Medium • Plume length exceeds boundary for more than 5% of daylight hours per year
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: High • Plume length exceeds boundary more than 25% of daylight hours per year
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: in Tables 29 and 30. For 60% of daylight hours, no visible plume is forecast to occur. When
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: visible, the plume length is predicted to be short, with a maximum plume length of around
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36:7.1.14. For daylight hours, the plume is forecast to extend to a length of up to 152m for the 95th
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: consideration (see Section 2.12.) the visible plume would remain within the Installation’s
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36:7.1.15. The maximum visible plume, regardless of plume direction, would remain within the
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: Installation’s boundary 85% of the time, with a visible plume length of 77m for the 85th
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: HSR1) the 99th Percentile visible plume length for daylight hours would only extend to this
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36:7.1.17. Consequently, based on the SEPA criteria, the impact of the visible plume for daylight hours
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:36: • the plume is visible 34% of the time;
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:37: • the plume length exceeds the nearest point of the site boundary distance for more
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:37: industrial land use. Visible plumes would not extend to the vast majority of the human
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:37: receptor locations assessed and only very seldom would plumes be visible at HSR1.
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:37:7.1.19. Consequently, it is likely that the impact of visible plumes could be considered insignificant.
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:92:11.1.7. An assessment of plume visibility was also undertaken which included daytime and night
R-2023-0224-CD-ECL.007.04.01_ADM - Issue 1a (2 of 3).pdf:92: time hours. When daylight hours only were considered, visible plumes would only occur
R-2020-0820-ESM-Lackenby ES - Vol 2 - Chapter E - Air Quality - Dec 2020.pdf:10: development are dust deposition, resulting in the soiling of surfaces; visible dust plumes;
R-2020-0820-ESM-Lackenby ES - Vol 2 - Chapter J - LVIA - Dec 2020.pdf:28: station and chimney stack, with plumes of steam emerging into the skyline. Nearby Errington
R-2020-0820-ESM-Lackeny - Planning Statement - Dec 2020.pdf:42: development are dust deposition, resulting in the soiling of surfaces; visible dust plumes;
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:3:7. ASSESSMENT OF AIR QUALITY IMPACTS - PLUME VISIBILITY 117
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:3: 7.1. Forecast Visible Plumes 117
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:5:Table 29: Predicted Visible Plumes 117
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:5:Table 30: 10-100th Percentile Plume Lengths 118
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:5:Table 31: Screening Criteria for Plume Visibility 119
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:11: • to assess plume visibility;
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:14: buildings, dry deposition fluctuations and visible plumes. The model results have been
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:14:2.1.3. ADMS 5.2 is a new generation Gaussian plume air dispersion model, which means that the
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:48: • plume visibility from the Installation;
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:50: occur when a plume from an elevated source affects airborne concentrations experienced
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126:7. ASSESSMENT OF AIR QUALITY IMPACTS - PLUME VISIBILITY
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126:7.1. Forecast Visible Plumes
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126:7.1.1. This section of the report describes the potential visible plume impacts from the
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: Installation’s A1 and A2 stack. A plume will become visible when water vapour in the plume
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: condenses to form small particles in the form of water droplets. A plume is defined as
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: “visible” if the liquid water content of the plume at the centreline exceeds 0.000015 kg/kg
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: and is defined to have grounded if the vertical spread of the plume is larger than the plume
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: the plume in kg/kg (i.e., the mass of water vapour per unit mass of dry release at the source)
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126:7.1.3. Plume visibility for the main stack was assessed for the 5 years of observed met data and
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: required for plume visibility calculation.
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126:7.1.4. The modelled lengths of visible vapour plumes are provided in Table 29 for all hours –
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: Table 29: Predicted Visible Plumes
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: Visible Plumes
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: Visible Plumes
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: visible plumes 73.83 78.77 80.82 73.64 70.11 36.40
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: visible plume 405.46 447.61 499.83 412.44 370.35 297.71
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126:7.1.5. The results of the plume visibility assessment concluded that visible plumes will only occur
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: for a maximum of 35% of the hours in a year. The maximum length of a visible plume from
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: the Installation is 499.83m. However, for the worst-case met year, average visible plumes
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126:7.1.6. It is also important to consider how often the plumes of varying length will be present for.
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:126: Table 30 provides the 10-100th Percentile plume lengths for each met year considered. All
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: Table 30: 10-100th Percentile Plume Lengths
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 10th Percentile Plume Length 0 0 0 0 0 0
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 20th Percentile Plume Length 0 0 0 0 0 0
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 30th Percentile Plume Length 0 0 0 0 0 0
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 40th Percentile Plume Length 0 0 0 0 0 0
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 50th Percentile Plume Length 0 0 0 0 0 0
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 60th Percentile Plume Length 0 0 0 0 0 0
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 70th Percentile Plume Length 9 9 16 10 14 0
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 80th Percentile Plume Length 39 47 54 42 43 0
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 85th Percentile Plume Length 59 67 73 61 62 0
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 90th Percentile Plume Length 89 90 98 87 87 19
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 95th Percentile Plume Length 141 139 144 137 135 42
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 98th Percentile Plume Length 202 216 215 202 195 68
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 99th Percentile Plume Length 251 266 267 241 238 92
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 100th Percentile Plume Length 405 448 500 412 370 298
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127:7.1.7. The results in Table 30 show that for 60% of all hours, no visible plume is forecast to occur.
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: When visible, the plume length is predicted to be short, with a maximum plume length of
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127:7.1.8. The plume is forecast to extend to a length of up to 144m for the 95th Percentile and, when
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: 2.12.) the visible plume would remain within the Installation’s boundary for the majority of
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: circa 90m to the north of the A1 and A2 emission points, the maximum visible plume,
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: regardless of plume direction, would remain within the Installation’s boundary 85% of the
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:127: stacks. Consequently, as demonstrated by the 99th Percentile in Table 30, the plume would
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128:7.1.11. In the absence of EA specific guidance on plume visibility, SEPA’s H1 guidance32, has been
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: used to assess the impact of plume visibility. The screening criteria used is provided in
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: Table 31: Screening Criteria for Plume Visibility
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: Insignificant • Plume length exceeds boundary less than 5% of daylight hours per year
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: Low • Plume length exceeds boundary less than 5% of daylight hours per year
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: Medium • Plume length exceeds boundary for more than 5% of daylight hours per year
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: High • Plume length exceeds boundary more than 25% of daylight hours per year
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: in Tables 29 and 30. For 60% of daylight hours, no visible plume is forecast to occur. When
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: visible, the plume length is predicted to be short, with a maximum plume length of around
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128:7.1.14. For daylight hours, the plume is forecast to extend to a length of up to 152m for the 95th
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: consideration (see Section 2.12.) the visible plume would remain within the Installation’s
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128:7.1.15. The maximum visible plume, regardless of plume direction, would remain within the
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: Installation’s boundary 85% of the time, with a visible plume length of 77m for the 85th
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: HSR1) the 99th Percentile visible plume length for daylight hours would only extend to this
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128:7.1.17. Consequently, based on the SEPA criteria, the impact of the visible plume for daylight hours
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:128: • the plume is visible 34% of the time;
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:129: • the plume length exceeds the nearest point of the site boundary distance for more
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:129: industrial land use. Visible plumes would not extend to the vast majority of the human
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:129: receptor locations assessed and only very seldom would plumes be visible at HSR1.
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:129:7.1.19. Consequently, it is likely that the impact of visible plumes could be considered insignificant.
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:184:11.1.7. An assessment of plume visibility was also undertaken which included daytime and night
R-2023-0253-RMM-ECL.007.04.01_ADM - Issue 1a (1 of 3).pdf:184: time hours. When daylight hours only were considered, visible plumes would only occur
R-2021-0943-CD-SBQ1-GCL-ENV-SBKXX-PL-WM-000001_CEMP_A (Fit for Construction)_C03.pdf:28:and the results of the hydrodynamic and sediment plume modelling, the EIA has predicted an impact
R-2021-0943-CD-SBQ1-GCL-ENV-SBKXX-PL-WM-000001_CEMP_A (Fit for Construction)_C03.pdf:51: plumes of sediment to form. The plume effects arising from the river dredging are characterised by
R-2021-0943-CD-SBQ1-GCL-ENV-SBKXX-PL-WM-000001_CEMP_A (Fit for Construction)_C03.pdf:51: in concentration over following hours. Since the dredging is a near-continuous operation, the plume
R-2021-0943-CD-SBQ1-GCL-ENV-SBKXX-PL-WM-000001_CEMP_A (Fit for Construction)_C03.pdf:51: plume modelling shows relatively limited areas of high suspended solids concentrations, which only
R-2021-0943-CD-SBQ1-GCL-ENV-SBKXX-PL-WM-000001_CEMP_A (Fit for Construction)_C03.pdf:51: environmental quality standard (EQS) during capital dredging. However, sediment plume modelling
R-2021-0943-CD-SBQ1-GCL-ENV-SBKXX-PL-WM-000001.pdf:28:and the results of the hydrodynamic and sediment plume modelling, the EIA has predicted an impact
R-2021-0943-CD-SBQ1-GCL-ENV-SBKXX-PL-WM-000001.pdf:51: plumes of sediment to form. The plume effects arising from the river dredging are characterised by
R-2021-0943-CD-SBQ1-GCL-ENV-SBKXX-PL-WM-000001.pdf:51: in concentration over following hours. Since the dredging is a near-continuous operation, the plume
R-2021-0943-CD-SBQ1-GCL-ENV-SBKXX-PL-WM-000001.pdf:51: plume modelling shows relatively limited areas of high suspended solids concentrations, which only
R-2021-0943-CD-SBQ1-GCL-ENV-SBKXX-PL-WM-000001.pdf:51: environmental quality standard (EQS) during capital dredging. However, sediment plume modelling
R-2023-0291-ESM-SOL_23_P016_GLR Statement of Community Engagement Annex 3.C - Online Public Consultation Page.pdf:9: that plumes are not likely to impact the Teesmouth Estuary or the residents of the local area.
R-2023-0291-ESM-ES Vol 1 Chapter 7 Air Quality.pdf:11: flow, creating zones of increased turbulence. Increased turbulence causes the plume to come to ground
R-2023-0291-ESM-ES Vol 1 Chapter 7 Air Quality.pdf:11: turbulence and reducing the distance between the plume centre line and the ground level. A terrain
R-2022-0096-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02-SB_DQRA - Detailed Quantitative Risk Assessment - South Bank.pdf:21:plume located north towards the River Tees from the SBA_AUK_BH110 area is present. The NAPL was found
R-2022-0096-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02-SB_DQRA - Detailed Quantitative Risk Assessment - South Bank.pdf:28:groundwater plume originating from a localised source. Further higher concentrations were measured in the
R-2022-0096-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02-SB_DQRA - Detailed Quantitative Risk Assessment - South Bank.pdf:29:In groundwater, a more distinct plume is evident in the vicinity of the SBCO area and southern SBA boundary,
R-2022-0096-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02-SB_DQRA - Detailed Quantitative Risk Assessment - South Bank.pdf:40:Although the distribution of free and total cyanide does not form such an apparent plume-like distribution in
R-2022-0096-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02-SB_DQRA - Detailed Quantitative Risk Assessment - South Bank.pdf:41:area and maybe associated with the plume.
R-2022-0096-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02-SB_DQRA.pdf:21:plume located north towards the River Tees from the SBA_AUK_BH110 area is present. The NAPL was found
R-2022-0096-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02-SB_DQRA.pdf:28:groundwater plume originating from a localised source. Further higher concentrations were measured in the
R-2022-0096-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02-SB_DQRA.pdf:29:In groundwater, a more distinct plume is evident in the vicinity of the SBCO area and southern SBA boundary,
R-2022-0096-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02-SB_DQRA.pdf:40:Although the distribution of free and total cyanide does not form such an apparent plume-like distribution in
R-2022-0096-CD-10035117-AUK-XX-XX-RP-ZZ-0331-02-SB_DQRA.pdf:41:area and maybe associated with the plume.
R-2021-0713-CD-10035117-AUK-XX-XX-RP-ZZ-0270-01-SBA_DQRA.pdf:17:site. While the DNAPL has not been measured downstream, a dissolved phase plume located north towards
R-2021-0713-CD-10035117-AUK-XX-XX-RP-ZZ-0270-01-SBA_DQRA.pdf:21:In groundwater, a more distinct plume is evident and does not appear to be associated with concentrations in
R-2021-0713-CD-10035117-AUK-XX-XX-RP-ZZ-0270-01-SBA_DQRA.pdf:76:Plume thickness 1.20
R-2021-0713-CD-10035117-AUK-XX-XX-RP-ZZ-0270-01-SBA_DQRA.pdf:84: Initial contaminant concentration in groundwater at plume core C0 1.00E+00 mg/l 0 10 20 30 40 50 60 15.0 6.19E-01
R-2021-0713-CD-10035117-AUK-XX-XX-RP-ZZ-0270-01-SBA_DQRA.pdf:84: Width of plume in aquifer at source (perpendicular to flow) Sz 1.90E+02 m 22.5 4.87E-01
R-2021-0713-CD-10035117-AUK-XX-XX-RP-ZZ-0270-01-SBA_DQRA.pdf:84: Plume thickness at source Sy 1.20E+00 m Dispersivity based on Xu0& EcksteinNote graph assumes plume disperses vertically in one direction only. An alternative
R-2021-0713-CD-10035117-AUK-XX-XX-RP-ZZ-0270-01-SBA_DQRA.pdf:84: length the centre of the plume is located at the mid-depth of the aquifer is 27.5 4.15E-01
R-2021-0713-CD-10035117-AUK-XX-XX-RP-ZZ-0331-01-SB_DQRA.pdf:21:plume located north towards the River Tees from the SBA_AUK_BH110 area is present. The NAPL was found
R-2021-0713-CD-10035117-AUK-XX-XX-RP-ZZ-0331-01-SB_DQRA.pdf:28:groundwater plume originating from a localised source. Further higher concentrations were measured in the
R-2021-0713-CD-10035117-AUK-XX-XX-RP-ZZ-0331-01-SB_DQRA.pdf:29:In groundwater, a more distinct plume is evident in the vicinity of the SBCO area and southern SBA boundary,
R-2021-0713-CD-10035117-AUK-XX-XX-RP-ZZ-0331-01-SB_DQRA.pdf:38:area and maybe associated with the plume.
338486 - 338489, NE formal response to SBW MLA, 29.01.21.pdf:4: To restrict suspended sediment plumes to one side of the estuary at a time, and
338486 - 338489, NE formal response to SBW MLA, 29.01.21.pdf:6: To restrict suspended sediment plumes to one side of the estuary at a time, in
20210119 MLA202000507 Tees South Bank Quay CP advice + JPQC.pdf:4: Again, concern is largely focused on the water quality issue of the sediment plume, which is
20210119 MLA202000507 Tees South Bank Quay CP advice + JPQC.pdf:4: assessed as minor also, including the remobilisation of chemicals within the SSC plumes due
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:2: I. Revised modelling of the plume that takes into account other dredging activity which may
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:5: be dredged from the Tees, resulting in sediment plumes. The effects of the plumes have been
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:5: on the sediment plume model presented, the applicant concluded that peak concentrations from
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:5: dredging will be localised, with the lateral extent of the plume across the river channel predicted to
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:5: plume effects arising from dredging will be observed throughout the whole dredging continuous
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:5: low SSC from 0 to 8.5 mg/l. Modelling of the sediment plume during capital dredging indicates that
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:5: activities be undertaken simultaneously, the sediment plumes, could result in additive effect which
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:5: impact as far as possible. However, it is stated that ‘the additive effect of the sediment plumes from
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:6: a time in order to reduce the extent and impact of the sediment plume. However, in my opinion,
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:7: width of the river. This is to reduce both the extent and impact of the dredged plume, as
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:7: any plume generated by operations is predicted to remain on the same side of the river as
20210115 MLA202000507 South Bank Quay-phase 2 - Fisheries advice MG GE + JPQC.pdf:7: suspended sediment concentrations and the extent of the plume across the river channel will be
MLA-2020-00507.pdf:1: plume will not travel far enough to cause any issues either. Impacts at the disposal site
MLA-2020-00507.pdf:1: this is unlikely to be impacted by the works as the sediment plume is unlikely to travel that
20210201 MLA202000506 MLA202000507 Tees South Bank Phases 1 and 2 - EIA Licence Advice Minute - SEAL Advice v2+SJB.pdf:5: and would likely require sediment and plume dispersal modelling as part of a cumulative
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:The capital dredging of the river and the offshore disposal of dredged sediments both will cause plumes of
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:sediment to form. The plume effects arising from the river dredging are characterised by a short-lived
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:following hours. Since the dredging is a near-continuous operation, the plume effects will be observed
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected from the offshore
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:11:magnitude over a few hours after disposal. Deposition thicknesses of sediment from the plumes on the river
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:12:exceeding water quality standards was deemed to be low. Additionally, sediment plume modelling shows
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:12:resuspension of sediments. Such measures include dredging in long strips to ensure the plume is located
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:13:scheme footprint and the results of the hydrodynamic and sediment plume modelling, an impact of minor
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS-5.pdf:20:Based on the findings of hydrodynamic and sedimentary plume modelling, the disposal of dredged material
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:8:5 Hydrodynamic and sedimentary plume modelling report
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:55: Environmental Statement. modelling and modelling of sediment plume
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:57: Environmental Statement. 2014 modelling and modelling of sediment plume released from
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:60: • Sediment plume modelling: The updated and verified 3D Tees Estuary Tidal Model was used to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:60: coupling with a sediment plume model built in MIKE21-MT software. The sediment plume model
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:91:offshore site will both result in sediment plumes. These effects have been investigated using numerical
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:91:changes in bed thickness when the suspended sediment falls from the plume to become deposited on the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:92: represent a plume that would occur at any one point in time (such plumes are shown in the timestep
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:92: become affected by a plume at some point during the dredging or disposal activities (in some areas
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:92:or river channel). To illustrate this, Figures 6.32 – 6.35 shows the maximum extent of the plume during a
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:92:When the dredger is at the south-western end of the transect, the maximum spatial extent of the plume on
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:92:Middlesbrough Dock. When the dredger is at the north-eastern end of the transect, the extent of the plume
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:92:new quay. However, in all cases considered, the lateral extent of the plume across the river channel is very
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:92:narrow and the magnitude of the SSC within the plume beyond a few hundred metres from the point of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:92:release is of the order of 10 to 20mg/l and in the extremities of the plume reduces further to the same order
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:93:Figure 6.32 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:94:Figure 6.33 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:95:Figure 6.34 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:96:Figure 6.35 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:97:Results from this scenario are broadly similar to those from Stage 1, but now separate plumes are created
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:97:plumes can coalesce and collectively occupy around half the width of the river channel as they move
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:98:Figure 6.37 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:99:Figure 6.38 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:99:plume (at low concentrations) becomes slightly greater; (ii) the extent of the plume across the river channel
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:99:becomes wider; and (iii) at times two plumes are created by the in-parallel dredging activities. Despite these
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:100:Figures 6.40 – 6.43 shows the maximum extent of the plume during a release from the south-western corner
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:100:and the spatial extents of the plume arising from Stage 3 of the dredging are much lower than those
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:101:Figure 6.40 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:102:Figure 6.41 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:103:Figure 6.42 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:104:Figure 6.43 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:104:the maximum plume extent and maximum SSC values within the plume are much lower than experienced
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:104:during both Stages 1 and 2 of the dredging (note the slight plume shown in the mid channel is a remnant of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:104:maximum extent of the plume is confined to within the length of the proposed quay and covers only a very
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:105:phase of the tide). Figure 6.45 and 6.46 shows the maximum extent of the plume during a release from the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:105:On the ebb phase, the plume can extend at low (<30mg/l) concentrations along the jetties of the Oil Terminal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:105:Depot. Under no conditions does the plume enter Tees Dock at any significant concentration.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:106:Figure 6.45 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:107:Figure 6.46 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:107:the plume is created at the turning circle and along parts of the north bank of the river. As with previous
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:108:The sediment plumes that arise from the four stages of the dredging could potentially affect areas of riverbed
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:108:that during the predicted four months of dredging, all individual or coalesced plume effects are confined to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:108:Furthermore, all plumes associated with dredging of the berthing pocket and river channel in the vicinity of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:108:whilst all plumes associated with dredging of the turning circle are confined to the left bank (north of centre
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:109:No plume effects (and by implication no deposition effects) of a significant level above background values
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:110:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:110:zone of influence from the sediment plumes.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:111:Within this maximum zone of influence from sediment plumes and bed deposition, the following receptors
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:112:elevations in SSC drop rapidly after each dredging plume has dispersed, and return to baseline levels at
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:the 10-minute duration of disposal activity; and (iii) at selected intervals thereafter until the initial plume
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. It can then
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:This plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:At 30 minutes after cessation of discharge (Plot F), the plume is less than 250mg/l at its localised centre,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:phase of the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:activity commences and starts to form its own sediment plume (Plot H), the initial plume has moved
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:sufficiently far from its point of release that it does not coalesce with the new plume and, by this time, is less
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:not visible in the plots at the magnitudes presented. The original plume continues to disperse such that
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:although when the discharge is made during the flooding tide, the plume moves in a south-easterly direction,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:along the axis of principal tidal flows. At times when the release is around slack water, the plume tends to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:118:west or south-east, respectively). However, when this occurs the concentration in the plume reduces readily
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:119:Figure 6.60 Plume of enhanced SSCs arising from disposal activities during Stage 1 of the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:120:from the BHD (although the time intervals are greater), the initial plume has greater SSC values at its centre,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:120:case for maximum SSC), the plume resides in spatial extent around the point of release during the slack
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:120:plume has started to move towards the south-east through advection by the flood tidal currents, and the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:120:release point (Plot F). At this point in time, the TSHD plume has further reduced in peak concentration to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:120:around 200mg/l. Some 30 minutes later, the TSHD plume and subsequent BHD plume have fully coalesced,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:120:with two peaks in concentration; the original TSHD plume has a peak now around 100mg/l locally at its
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:120:centre whilst the more recently formed (but smaller) BHD plume has a peak SSC value at its centre of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:120:previous TSHD release, the now fully coalesced plume has a peak SSC of around 100mg/l very locally and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:120:plume remains present a further 45 minutes later, the original coalesced plume is considerably smaller in
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:120:successive disposal events, any coalescence of subsequent plumes would continue to result in only
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:120:coalescence of successive plumes at significant concentrations or for long durations is very low even during
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:121:Figure 6.61 Plume of enhanced SSCs arising from disposal activities during Stage 2 of the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:122:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. The
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:122:plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:122:The plumes associated with Stage 3 disposal activities are generally lower in concentration than those for
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:122:Indeed, the plume arising from Stage 3 disposal activities fully disperses before the next subsequent
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:122:in this offshore area). Due to this, there is no possibility of plumes coalescing from Stage 3 disposal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:123:Figure 6.4 Plume of enhanced SSCs arising from disposal activities during Stage 3 of the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:124:Like during Stage 2, there is potential for the plume from a TSHD discharge to coalesce with a preceding or
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:124:Plot A shows the residual plume from a TSHD disposal some 5 minutes before the commencement of a
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:124:separate plumes at 45 minutes after cessation of the BHD discharge. A further 30 minutes later, another
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:124:TSHD release occurs within the previous BHD plume extent (Plot E). Peak concentrations from the TSHD
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:124:plume has widely dispersed, a further BHD release is made some 50 minutes later, again within the previous
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:124:(now coalesced) plumes. Despite this coalesced plume now containing elements of three separate
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:124:the residual plume shown in Plot A coalesce with the ‘three-release’ plume (Plot G), although the SSC
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:124:values at the point of overlap are very low (~10mg/l). Around 55 minutes later, the plume is now mostly
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:124:disposal site, leading to coalescence of subsequent plumes, the resulting temporary, short duration effects
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:125:Figure 6.5 Plume of enhanced SSCs arising from disposal activities during Stage 4 of the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:126:for coalescence of subsequent plumes is greatest. In reality, subsequent disposals will be at different parts
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:126:At the extremities of the plume extent, there are wide zones of relatively low SSC values (<100mg/l).
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:126:sediment plume associated with one release event (this example being from Stage 1). It can be seen that
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:126:is negligible, whilst to the north it covers a similar zone to the sediment plume for this disposal event, which
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:130:the northern and southern boundaries (Figure 6.68). This correlates to the areas where a plume will extend
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:131:The river dredging and offshore disposal activities will both cause plumes of sediment to form close to the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:131:release point of material into the water column. These plumes will disperse under wave and current action
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:131:Once a plume is generated, the highest SSC values will be recorded at the point of river dredging or offshore
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:131:advected away from the point of release by the prevailing currents. At the peripheries of each plume, the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:131:working in parallel, there could be instances where two separately formed plumes coalesce to form one
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:131:(spatially) larger plume. However, the same principles of dispersion by prevailing currents applies, with
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:132:The plume effects arising from the river dredging are characterised by a short-lived localised increase in
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:132:plume effects will be observed throughout much of the approximately four-month period, but at varying
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:132:extents during the four different stages. During Stages 1-3 the dredging-related plume effects will be largely
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:132:Dock and Tees Dock. During Stage 4 the dredging-related plume effects will be largely confined to the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:132:very minor magnitudes, in areas covering the same spatial extent as the sediment plumes. Where this
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:132:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:132:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected by tidal currents
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:143: the findings of hydrodynamic and sedimentary plume
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:143: sediment and create smothering effects / turbidity / sediment plumes.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:144:are predicted to occur (e.g. sediment plumes generated during capital dredging and effects on tidal currents
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:157:Capital dredging would result in the creation of sediment plumes. To consider the potential extent and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:157:In all tidal conditions modelled, the lateral extent of the plume across the river channel is very narrow and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:157:the magnitude of concentrations within the plume beyond a few hundred metres from the point of release is
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:157:in the order of 10 - 20mg/l and in the extremities of the plume, reduces further to concentrations 0-10mg/l
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:157:Results for this stage were similar to those in Stage 1 but with separate plumes created by the different
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:157:dredgers. At some points in the cycle, areas of these initially separate plumes combine as they move
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:157:The maximum concentrations and the spatial extents of the plume arising from Stage 3 of the dredging are
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:157:and the production rate of dredging is notably lower. Figure 7.5 shows an example plume during Stage 3
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:157:Again, peak concentrations close to the dredger are shown in the plume modelling output. On the ebb
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:157:phase, the plume can extend at low concentrations (<30mg/l) along the jetties of the Oil Terminal towards
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:158:Figure 7. 3 Plume of suspended sediment concentrations arising from dredging activities during Stage 2
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:159:Figure 7. 4 Plume arising from dredging activities during Stage 1 of the capital dredge (release from the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:160:Figure 7. 5 Plume of suspended sediment concentrations arising from dredging activities during Stage
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:161:Figure 7.6 Plume of enhanced suspended sediment concentrations arising from dredging activities
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:162:sediment plume is not predicted to reach The Gares water quality monitoring point, no effects on the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:162:The relatively limited nature of the plume extents predicted for the proposed capital dredging indicates that
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:166:Additionally, information from sediment plume modelling (see Section 7.5.1) indicates that only the Smiths
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:194:hydrodynamic and sedimentary plume modelling undertaken. This section excludes consideration of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:210:In general, sediment plumes induced by dredging are considered to pose only a limited risk to water quality
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:210:dredging periods. The sediment plume generated by dredging would likely be dispersed by tidal currents
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:211:immediate vicinity of the dredger. Sediment plume modelling predicts different plume extents and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:211:cases, the sediment plume is predicted to be very narrow within the river, with the phase of dredging with
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:211:extremities of the plume.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:211:All plumes associated with different stages of dredging in the vicinity of the proposed new quay are confined
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:211:to the southern bank of the river, whilst all plumes associated with dredging of the turning circle are confined
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:211:to the northern bank. No plume effects of a significant level above background values are anticipated to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:211:The sediment plume modelling reported within Section 6 also extracted time series plots of changes in SSC
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:212:from the sediment plumes.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:212:(deposition) from the sediment plume model were extracted at a series of points within the affected river
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:256: hydrodynamic and sedimentary plume effects would not extend to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:257: hydrodynamic and sedimentary plume effects would not extend to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:296:In summary, the largest sediment plumes are likely to arise during Stage 2 of the dredging (i.e. BHD and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:296:(it is not a sediment plume, rather a combined zone of influence). The sediment dispersion modelling of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:296:distance from the dredging vessel, both laterally and along the line of the vessel, with plumes diminishing
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:296:of this assessment, the sediment plume may be regarded as representing a temporary loss of foraging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:297:terns do not forage to any significant extent within the predicted range of the sediment plume. Likewise, the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:297:England, 2018a), and the area likely to be affected by the sediment plume at any one time represents around
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:297:available even if the plume does result in temporary occlusion from the affected area. Furthermore, SSC
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:298:and the other stages of the dredge campaign would result in a smaller plume than that described for Stage
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:298: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:298: plume generated by operations is predicted to collectively occupy around half the width of the river
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:298:With the implementation of the above mitigation measure, the modelled plume would only occupy half of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:309:informed by the hydrodynamic and sedimentary plume modelling undertaken, as well as the understanding
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:318:details of the increase in SSC, including the visual output of sediment plume modelling for the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:319:sediment plume creating a ‘barrier’ effect could cause a significant disruption to the annual migration pattern,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:319:during a period of very hot and dry weather. Modelling of the sediment plume during capital dredging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:320:vessel, both laterally and along the line of the vessel. The periphery of the plume (10 to 20 mg/l) extends
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:320:The cross section of the river channel affected by the plume is particularly relevant when considering
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:320:narrow plume along the axis of the river.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:320:period. However, while unlikely, it has to be taken into account that sediment plumes encompassing the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:320: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:320: plume generated by operations is predicted to remain on the same side of the river as the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:320:Mitigation of the plume effects by reducing the size of the TSHD, and thus reducing the rate of overflow, is
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:424:well as hydrodynamic and sedimentary plume modelling reported in Section 6.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:478:As the offshore disposal commences, a plume of sediment would be generated with the greatest
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:478:concentrations predicted at the end of the discharge period. The sediment plume is predicted to increase
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:478:At 30 minutes after cessation of discharge, the plume is less than 250mg/l at its localised centre, reducing
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:478:the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of less than
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:478:commences and starts to form its own sediment plume, the initial plume has moved sufficiently far from its
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:478:point of release that it does not coalesce with the new plume and, by this time, is less than 40mg/l in SSC
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:478:at the magnitudes presented. The original plume continues to disperse such that after 4 hours and 25
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:478:At times when the release is around slack water, the plume tends to reside closer to the point of release for
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:478:However, when this occurs the concentration in the plume reduces readily because more material falls to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:479:Based on the modelled effects of the sediment plume at the Tees Bay C disposal site described above, it is
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:490: influencing the same area as affected by the sediment plume); and,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:491:the basis of the potential extent of the dredging and disposal plumes.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:500:All projects scoped into the CIA involve will involve capital dredging. This activity will create a plume of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:500:The extent of the sediment plume created by capital dredging is heavily dependent on the dredging plant
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:501:important to note that figures showing the “maximum extent of sediment plume dispersion and deposition”
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:501:do not represent a plume that would occur at any one point in time (such plumes are shown in the timestep
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:501:affected by a plume at some point during the dredging or disposal activities (in some areas this will be on a
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:501:Consequently, for the purposes of this CIA, the maximum zones of influence of sediment plume dispersion
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:501:of sediment plume dispersion and deposition onto the river and/or seabed during capital dredging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:501:sediment in the water column was predicted to be in close proximity to the dredger, with plume dispersion
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:501:resulting in a significantly reduced concentration of suspended sediment beyond the source of the plume.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:501:material will be re-dredged as part of the capital works for each scheme. At the peripheries of each plume,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:502:(right) as a result of the proposed scheme [Note: plots show sediment plume impacts arising from dredging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:506:addition, the predictions made for each project represent sediment plume dispersion under specific tidal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:506:where sediment plumes combine at peak concentration (as predicted by the EIA studies for each project)
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:506:at any location. Additionally, mitigation is outlined for all three schemes which would reduce plume extents
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:506:proposed scheme, it is considered unlikely that the plumes would overlap. As a result, there may be a
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:506:additional mitigation measures are identified to reduce any resulting sediment plume as far as possible and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:507:plumes.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:507:(deposition) from the sediment plume model were extracted at a series of points within the affected river
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:513:plumes occupy only half of the river cross section) has also been proposed for the NGCT project. For the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:513:England, 2018a), the area affected even by the combined plumes is likely to be low (for example, should
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:513:dredging plumes together will still affect only around 0.5% of the SPA subtidal habitat (Royal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:513:HaskoningDHV, 2015)). However, the additive effect of the sediment plumes from separate dredging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:514:sediment plumes may deter such species from migrating to and from spawning sites.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:514:the respective sediment plumes could result in an additive effect, as demonstrated in Figures 27.1 to 27.3.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:514:Significantly, the effect of a combined plume is not likely to result in a different behavioural response in fish
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:514:compared with the effect of the projects in isolation, although the increased plume footprint may increase
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:514:of the sediment plumes from separate dredging campaigns cannot be completely avoided if the campaigns
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:522:WFD water body (approximately 6.3km, see Figure 28.1) and plume modelling results described in Section
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:528: measures identified for the Tees estuary. habitats located within sediment plumes created
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:532:Capital dredging within the river would result in sediment plumes. To consider the potential extent and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:532: BHD working to dredge the In all tidal conditions modelled, the lateral extent of the plume across the river channel
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:532: upper soft material in the is very narrow and the magnitude of concentrations within the plume beyond a few
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:532: channel. extremities of the plume, reduces further to concentrations 0-10mg/l.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:532: 2 Results for this stage were similar to those in Stage 1 but with separate plumes
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:532: separate plumes combine as they move upstream and downstream according to the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:532: 3 BHD working to dredge the The maximum concentrations and the spatial extents of the plume arising from Stage
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:532: channel. notably lower. Plume very small and located close to the dredging activity.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:532: 4 Again, peak concentrations close to the dredger are shown in the plume modelling
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:532: output. On the ebb phase, the plume can extend at low concentrations (<30mg/l)
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:534:represent a more conservative scenario, as sediment plume modelling outlined above indicates relatively
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:534:limited plume extents for the majority of the capital dredge for the proposed scheme.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:535:Additionally, sediment plume results for Smiths Dock monitoring point (point 3) indicated only temporary
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:535:be temporary which would disperse following cessation of the works. Plume extents during each of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:537:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:538:zone of influence from the sediment plumes. As a result, a deterioration in ecological class status is not
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:539:peak migratory season, when a sediment plume creating a ‘barrier’ effect could cause a significant disruption
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:539:extent and impact of the plume. This allows a passage through which migratory fish will be able to move
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:539: dredging along the axis of the river to ensure the plumes are
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:544: • Cumulative effects of sediment plumes and associated effects on water quality and fish
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:545:Section 27 considers the potential cumulative effects of the proposed schemes on sediment plumes and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:545:marine water quality. To summarise, whilst the sediment plumes could combine to cover a larger area of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:545:plumes spreading across the width of the channel. Additionally, due to navigational safety, it is unlikely that
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:549:strips thus limiting the plume extent. As a result, non- temporary effects on water quality and associated
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:550:would be sediment plumes associated with dredging simultaneously. However, on further consideration,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:559:proposed scheme nor the modelled extent of the maximum-expected sediment plume from the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:559:influence of the proposed scheme will be determined by the sediment plume during dredging activities.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:572:The capital dredging of the river will cause plumes of sediment to form. The plume effects arising from the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:572:operation, the plume effects will be observed throughout much of the approximately five-month period, but
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:572:of sediment from the plumes on the river or seabed will be very small.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:575:requires use of TSHD and BHD on soft sediment in the channel and berth pocket) will result in plumes of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:575:with plumes diminishing typically to levels of <30 mg/l but often <10mg/l at a distance of no more than a few
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:575:England, 2018a). The area affected by the sediment plume generated from proposed dredging, though
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:580:In terms of intra-project effects on foraging common terns, the zone of influence from the sediment plume
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:580:of the area would not be increased since the plume is considered to be the most far-reaching effect on tern
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:583:Effects on fish may be compounded by the combined sediment plumes of other projects or plans that may
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:584:An interaction between the sediment plumes would only occur in the unlikely event that the capital dredging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:584:Plumes from each project would be temporary and short-lived. The same applies for the Anglo American
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:584:combined plumes is expected to be minor.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:584:sediment plumes occupy only half of the river cross section) has also been proposed for the NGCT project.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:586:The zone of influence from predicted sediment plumes (including the combined plumes from the proposed
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-9.pdf:593:sediment plumes arising from dredging. Construction Industry Research and Information Association
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:61:from the proposed dredging and disposal activity by coupling a sediment plume model built in MIKE21-MT
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:63:hydrodynamic and sedimentary regime assessment (particularly the plume dispersion modelling to
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:65:sediment plume modelling will, however, be used to inform impacts to water quality as a result of the
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:130:plume modelling report
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:131:Hydro-dynamic and sedimentary plume modelling
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:139: a sediment plume model built in MIKE3-MT software. The sediment plume model was run for the entire
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:193:plume dispersion model are described in this section.
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:197:The following assumptions have been made for the simulation of sediment plumes arising from dredging
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:200: to note that this type of figure does not represent a plume or deposition that would occur at any one
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:200: point in time (such plumes or deposition are shown in the animated timestep plots). Rather, this
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:200: affected by a plume or deposition at some point during the 4-months of dredging or disposal
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:202:although: (i) the lateral extent of the plume (at low concentrations) becomes slightly greater; (ii) the extent
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:202:of the plume across the river channel becomes wider; and (iii) at times two plumes are created by the in-
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:203:that during Stage 3 of the dredging, the maximum plume extent and maximum SSC values within the plume
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:203:are much lower than experienced during both Stage 1 and 2 of the dredging (note the slight plume shown
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:203:commences). During Stage 3, the maximum extent of the plume is confined to within the length of the
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:204:that during Stage 4 of the dredging, the plume is created at the turning circle and along parts of the north
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:205:and that during the 4 months of dredging, all plume effects are confined to within the river reaches that
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:205:Furthermore, all plumes associated with dredging of the berthing pocket and river channel in the vicinity of
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:205:plumes associated with dredging of the turning circle are confined to the left bank (north of centre line)
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:205:No plume effects (and by implication no deposition effects) of a significant level above background values
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:207:the plumes created by river dredging. It can be seen that much of the sediment falls to the bed within the
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:207:that is affected by the zone of influence from the sediment plumes.
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:208:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:208:single release point and the potential for coalescence of subsequent depositional plumes is greatest. In
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:208:a few km of the upstream and downstream boundaries. At the extremities of the plume extent, there are
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:208:sediment plume for this worst case. It can be seen that much of the sediment falls to the bed within the
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:208:similar zone to the sediment plume. In reality, disposals will be at different points within the licensed area,
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:210:The river dredging and offshore disposal activities will both cause plumes of sediment to form close to the
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:210:release point of material into the water column. These plumes will disperse under wave and current action
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:210:Once a plume is generated, the highest SSC values will be recorded at the point of river dredging or offshore
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:advected away from the point of release by the prevailing currents. At the peripheries of each plume, the
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:working in parallel, there could be instances where two separately formed plumes coalesce to form one
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:(spatially) larger plume. However, the same principles of dispersion by prevailing currents applies, with
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:The plume effects arising from the river dredging are characterised by a short-lived localised increase in
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:plume effects will be observed throughout much the 4-month period, but at varying extents during the four
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:different stages. During Stages 1-3 the dredging-related plume effects will be largely confined to the channel
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:During Stage 4 the dredging-related plume effects will be largely confined to the channel areas north of the
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:areas covering the same spatial extent as the sediment plumes. Where this occurs in the river channel or
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part1-3.pdf:211:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected by tidal currents
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:2:that the most important potential coastal process impact would be changes in suspended sediment plumes,
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:2:suspended sediment plumes; that being each disposal within the licensed disposal site being released at
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:2:plumes from separate disposal activities over the whole dredging campaign.
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:2:licensed disposal site is a worst case for potential plume coalescence it is not realistic in terms of changes
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:2:bed thickness caused by deposition of material from the sediment plume associated with one single release
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:4:(Figure 6.67). This correlates to the areas where a plume will extend along the axis of the prevailing tidal
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:15: • Revised modelling of the plume that takes into account other dredging activity which may be
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:15:each project are presented and discussed. It is not practicable to undertake a combined sediment plume
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:15:addition, the predictions made for each project represent sediment plume dispersion under specific tidal
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:16:scenario where sediment plumes combine at peak concentration (as predicted by the EIA studies for each
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:16:project) at any location. Additionally, mitigation is outlined for all three schemes which would reduce plume
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:16:We would also like to reiterate that the sediment plumes shown in Section 6 of the EIA Report are maximum
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:16:not represent a plume that would occur at any one point of time. Rather, the figures show the areas of the
MLA_2020_00507-PC1084-RHD-SB-EN-CO-EV-1116 Response to Cefas comments-10.pdf:16:river channel that will become affected by a plume at some point during the dredging campaign (in some
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:8:5 Hydrodynamic and sedimentary plume modelling report
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:55: Environmental Statement. modelling and modelling of sediment plume
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:57: Environmental Statement. 2014 modelling and modelling of sediment plume released from
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:60: • Sediment plume modelling: The updated and verified 3D Tees Estuary Tidal Model was used to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:60: coupling with a sediment plume model built in MIKE21-MT software. The sediment plume model
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:91:offshore site will both result in sediment plumes. These effects have been investigated using numerical
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:91:changes in bed thickness when the suspended sediment falls from the plume to become deposited on the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92: represent a plume that would occur at any one point in time (such plumes are shown in the timestep
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92: become affected by a plume at some point during the dredging or disposal activities (in some areas
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:or river channel). To illustrate this, Figures 6.32 – 6.35 shows the maximum extent of the plume during a
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:When the dredger is at the south-western end of the transect, the maximum spatial extent of the plume on
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:Middlesbrough Dock. When the dredger is at the north-eastern end of the transect, the extent of the plume
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:new quay. However, in all cases considered, the lateral extent of the plume across the river channel is very
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:narrow and the magnitude of the SSC within the plume beyond a few hundred metres from the point of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:92:release is of the order of 10 to 20mg/l and in the extremities of the plume reduces further to the same order
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:93:Figure 6.32 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:94:Figure 6.33 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:95:Figure 6.34 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:96:Figure 6.35 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:97:Results from this scenario are broadly similar to those from Stage 1, but now separate plumes are created
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:97:plumes can coalesce and collectively occupy around half the width of the river channel as they move
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:98:Figure 6.37 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:99:Figure 6.38 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:99:plume (at low concentrations) becomes slightly greater; (ii) the extent of the plume across the river channel
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:99:becomes wider; and (iii) at times two plumes are created by the in-parallel dredging activities. Despite these
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:100:Figures 6.40 – 6.43 shows the maximum extent of the plume during a release from the south-western corner
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:100:and the spatial extents of the plume arising from Stage 3 of the dredging are much lower than those
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:101:Figure 6.40 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:102:Figure 6.41 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:103:Figure 6.42 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:104:Figure 6.43 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:104:the maximum plume extent and maximum SSC values within the plume are much lower than experienced
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:104:during both Stages 1 and 2 of the dredging (note the slight plume shown in the mid channel is a remnant of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:104:maximum extent of the plume is confined to within the length of the proposed quay and covers only a very
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:105:phase of the tide). Figure 6.45 and 6.46 shows the maximum extent of the plume during a release from the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:105:On the ebb phase, the plume can extend at low (<30mg/l) concentrations along the jetties of the Oil Terminal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:105:Depot. Under no conditions does the plume enter Tees Dock at any significant concentration.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:106:Figure 6.45 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:107:Figure 6.46 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:107:the plume is created at the turning circle and along parts of the north bank of the river. As with previous
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:108:The sediment plumes that arise from the four stages of the dredging could potentially affect areas of riverbed
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:108:that during the predicted four months of dredging, all individual or coalesced plume effects are confined to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:108:Furthermore, all plumes associated with dredging of the berthing pocket and river channel in the vicinity of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:108:whilst all plumes associated with dredging of the turning circle are confined to the left bank (north of centre
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:109:No plume effects (and by implication no deposition effects) of a significant level above background values
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:110:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:110:zone of influence from the sediment plumes.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:111:Within this maximum zone of influence from sediment plumes and bed deposition, the following receptors
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:112:elevations in SSC drop rapidly after each dredging plume has dispersed, and return to baseline levels at
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:the 10-minute duration of disposal activity; and (iii) at selected intervals thereafter until the initial plume
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. It can then
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:This plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:At 30 minutes after cessation of discharge (Plot F), the plume is less than 250mg/l at its localised centre,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:phase of the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:activity commences and starts to form its own sediment plume (Plot H), the initial plume has moved
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:sufficiently far from its point of release that it does not coalesce with the new plume and, by this time, is less
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:not visible in the plots at the magnitudes presented. The original plume continues to disperse such that
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:although when the discharge is made during the flooding tide, the plume moves in a south-easterly direction,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:along the axis of principal tidal flows. At times when the release is around slack water, the plume tends to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:118:west or south-east, respectively). However, when this occurs the concentration in the plume reduces readily
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:119:Figure 6.60 Plume of enhanced SSCs arising from disposal activities during Stage 1 of the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:from the BHD (although the time intervals are greater), the initial plume has greater SSC values at its centre,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:case for maximum SSC), the plume resides in spatial extent around the point of release during the slack
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:plume has started to move towards the south-east through advection by the flood tidal currents, and the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:release point (Plot F). At this point in time, the TSHD plume has further reduced in peak concentration to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:around 200mg/l. Some 30 minutes later, the TSHD plume and subsequent BHD plume have fully coalesced,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:with two peaks in concentration; the original TSHD plume has a peak now around 100mg/l locally at its
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:centre whilst the more recently formed (but smaller) BHD plume has a peak SSC value at its centre of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:previous TSHD release, the now fully coalesced plume has a peak SSC of around 100mg/l very locally and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:plume remains present a further 45 minutes later, the original coalesced plume is considerably smaller in
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:successive disposal events, any coalescence of subsequent plumes would continue to result in only
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:120:coalescence of successive plumes at significant concentrations or for long durations is very low even during
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:121:Figure 6.61 Plume of enhanced SSCs arising from disposal activities during Stage 2 of the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:122:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. The
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:122:plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:122:The plumes associated with Stage 3 disposal activities are generally lower in concentration than those for
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:122:Indeed, the plume arising from Stage 3 disposal activities fully disperses before the next subsequent
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:122:in this offshore area). Due to this, there is no possibility of plumes coalescing from Stage 3 disposal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:123:Figure 6.4 Plume of enhanced SSCs arising from disposal activities during Stage 3 of the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:Like during Stage 2, there is potential for the plume from a TSHD discharge to coalesce with a preceding or
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:Plot A shows the residual plume from a TSHD disposal some 5 minutes before the commencement of a
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:separate plumes at 45 minutes after cessation of the BHD discharge. A further 30 minutes later, another
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:TSHD release occurs within the previous BHD plume extent (Plot E). Peak concentrations from the TSHD
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:plume has widely dispersed, a further BHD release is made some 50 minutes later, again within the previous
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:(now coalesced) plumes. Despite this coalesced plume now containing elements of three separate
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:the residual plume shown in Plot A coalesce with the ‘three-release’ plume (Plot G), although the SSC
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:values at the point of overlap are very low (~10mg/l). Around 55 minutes later, the plume is now mostly
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:124:disposal site, leading to coalescence of subsequent plumes, the resulting temporary, short duration effects
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:125:Figure 6.5 Plume of enhanced SSCs arising from disposal activities during Stage 4 of the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:126:for coalescence of subsequent plumes is greatest. In reality, subsequent disposals will be at different parts
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:126:At the extremities of the plume extent, there are wide zones of relatively low SSC values (<100mg/l).
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:126:sediment plume associated with one release event (this example being from Stage 1). It can be seen that
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:126:is negligible, whilst to the north it covers a similar zone to the sediment plume for this disposal event, which
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:130:the northern and southern boundaries (Figure 6.68). This correlates to the areas where a plume will extend
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:The river dredging and offshore disposal activities will both cause plumes of sediment to form close to the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:release point of material into the water column. These plumes will disperse under wave and current action
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:Once a plume is generated, the highest SSC values will be recorded at the point of river dredging or offshore
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:advected away from the point of release by the prevailing currents. At the peripheries of each plume, the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:working in parallel, there could be instances where two separately formed plumes coalesce to form one
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:131:(spatially) larger plume. However, the same principles of dispersion by prevailing currents applies, with
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:The plume effects arising from the river dredging are characterised by a short-lived localised increase in
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:plume effects will be observed throughout much of the approximately four-month period, but at varying
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:extents during the four different stages. During Stages 1-3 the dredging-related plume effects will be largely
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:Dock and Tees Dock. During Stage 4 the dredging-related plume effects will be largely confined to the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:very minor magnitudes, in areas covering the same spatial extent as the sediment plumes. Where this
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:132:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected by tidal currents
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:143: the findings of hydrodynamic and sedimentary plume
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:143: sediment and create smothering effects / turbidity / sediment plumes.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:144:are predicted to occur (e.g. sediment plumes generated during capital dredging and effects on tidal currents
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:Capital dredging would result in the creation of sediment plumes. To consider the potential extent and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:In all tidal conditions modelled, the lateral extent of the plume across the river channel is very narrow and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:the magnitude of concentrations within the plume beyond a few hundred metres from the point of release is
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:in the order of 10 - 20mg/l and in the extremities of the plume, reduces further to concentrations 0-10mg/l
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:Results for this stage were similar to those in Stage 1 but with separate plumes created by the different
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:dredgers. At some points in the cycle, areas of these initially separate plumes combine as they move
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:The maximum concentrations and the spatial extents of the plume arising from Stage 3 of the dredging are
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:and the production rate of dredging is notably lower. Figure 7.5 shows an example plume during Stage 3
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:Again, peak concentrations close to the dredger are shown in the plume modelling output. On the ebb
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:157:phase, the plume can extend at low concentrations (<30mg/l) along the jetties of the Oil Terminal towards
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:158:Figure 7. 3 Plume of suspended sediment concentrations arising from dredging activities during Stage 2
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:159:Figure 7. 4 Plume arising from dredging activities during Stage 1 of the capital dredge (release from the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:160:Figure 7. 5 Plume of suspended sediment concentrations arising from dredging activities during Stage
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:161:Figure 7.6 Plume of enhanced suspended sediment concentrations arising from dredging activities
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:162:sediment plume is not predicted to reach The Gares water quality monitoring point, no effects on the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:162:The relatively limited nature of the plume extents predicted for the proposed capital dredging indicates that
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:166:Additionally, information from sediment plume modelling (see Section 7.5.1) indicates that only the Smiths
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:194:hydrodynamic and sedimentary plume modelling undertaken. This section excludes consideration of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:210:In general, sediment plumes induced by dredging are considered to pose only a limited risk to water quality
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:210:dredging periods. The sediment plume generated by dredging would likely be dispersed by tidal currents
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:immediate vicinity of the dredger. Sediment plume modelling predicts different plume extents and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:cases, the sediment plume is predicted to be very narrow within the river, with the phase of dredging with
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:extremities of the plume.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:All plumes associated with different stages of dredging in the vicinity of the proposed new quay are confined
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:to the southern bank of the river, whilst all plumes associated with dredging of the turning circle are confined
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:to the northern bank. No plume effects of a significant level above background values are anticipated to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:211:The sediment plume modelling reported within Section 6 also extracted time series plots of changes in SSC
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:212:from the sediment plumes.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:212:(deposition) from the sediment plume model were extracted at a series of points within the affected river
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:256: hydrodynamic and sedimentary plume effects would not extend to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:257: hydrodynamic and sedimentary plume effects would not extend to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:296:In summary, the largest sediment plumes are likely to arise during Stage 2 of the dredging (i.e. BHD and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:296:(it is not a sediment plume, rather a combined zone of influence). The sediment dispersion modelling of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:296:distance from the dredging vessel, both laterally and along the line of the vessel, with plumes diminishing
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:296:of this assessment, the sediment plume may be regarded as representing a temporary loss of foraging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:297:terns do not forage to any significant extent within the predicted range of the sediment plume. Likewise, the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:297:England, 2018a), and the area likely to be affected by the sediment plume at any one time represents around
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:297:available even if the plume does result in temporary occlusion from the affected area. Furthermore, SSC
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:298:and the other stages of the dredge campaign would result in a smaller plume than that described for Stage
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:298: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:298: plume generated by operations is predicted to collectively occupy around half the width of the river
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:298:With the implementation of the above mitigation measure, the modelled plume would only occupy half of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:309:informed by the hydrodynamic and sedimentary plume modelling undertaken, as well as the understanding
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:318:details of the increase in SSC, including the visual output of sediment plume modelling for the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:319:sediment plume creating a ‘barrier’ effect could cause a significant disruption to the annual migration pattern,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:319:during a period of very hot and dry weather. Modelling of the sediment plume during capital dredging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320:vessel, both laterally and along the line of the vessel. The periphery of the plume (10 to 20 mg/l) extends
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320:The cross section of the river channel affected by the plume is particularly relevant when considering
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320:narrow plume along the axis of the river.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320:period. However, while unlikely, it has to be taken into account that sediment plumes encompassing the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320: plume generated by operations is predicted to remain on the same side of the river as the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:320:Mitigation of the plume effects by reducing the size of the TSHD, and thus reducing the rate of overflow, is
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:424:well as hydrodynamic and sedimentary plume modelling reported in Section 6.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:As the offshore disposal commences, a plume of sediment would be generated with the greatest
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:concentrations predicted at the end of the discharge period. The sediment plume is predicted to increase
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:At 30 minutes after cessation of discharge, the plume is less than 250mg/l at its localised centre, reducing
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of less than
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:commences and starts to form its own sediment plume, the initial plume has moved sufficiently far from its
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:point of release that it does not coalesce with the new plume and, by this time, is less than 40mg/l in SSC
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:at the magnitudes presented. The original plume continues to disperse such that after 4 hours and 25
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:At times when the release is around slack water, the plume tends to reside closer to the point of release for
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:478:However, when this occurs the concentration in the plume reduces readily because more material falls to
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:479:Based on the modelled effects of the sediment plume at the Tees Bay C disposal site described above, it is
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:490: influencing the same area as affected by the sediment plume); and,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:491:the basis of the potential extent of the dredging and disposal plumes.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:500:All projects scoped into the CIA involve will involve capital dredging. This activity will create a plume of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:500:The extent of the sediment plume created by capital dredging is heavily dependent on the dredging plant
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:important to note that figures showing the “maximum extent of sediment plume dispersion and deposition”
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:do not represent a plume that would occur at any one point in time (such plumes are shown in the timestep
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:affected by a plume at some point during the dredging or disposal activities (in some areas this will be on a
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:Consequently, for the purposes of this CIA, the maximum zones of influence of sediment plume dispersion
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:of sediment plume dispersion and deposition onto the river and/or seabed during capital dredging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:sediment in the water column was predicted to be in close proximity to the dredger, with plume dispersion
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:resulting in a significantly reduced concentration of suspended sediment beyond the source of the plume.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:501:material will be re-dredged as part of the capital works for each scheme. At the peripheries of each plume,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:502:(right) as a result of the proposed scheme [Note: plots show sediment plume impacts arising from dredging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:506:addition, the predictions made for each project represent sediment plume dispersion under specific tidal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:506:where sediment plumes combine at peak concentration (as predicted by the EIA studies for each project)
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:506:at any location. Additionally, mitigation is outlined for all three schemes which would reduce plume extents
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:506:proposed scheme, it is considered unlikely that the plumes would overlap. As a result, there may be a
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:506:additional mitigation measures are identified to reduce any resulting sediment plume as far as possible and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:507:plumes.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:507:(deposition) from the sediment plume model were extracted at a series of points within the affected river
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:513:plumes occupy only half of the river cross section) has also been proposed for the NGCT project. For the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:513:England, 2018a), the area affected even by the combined plumes is likely to be low (for example, should
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:513:dredging plumes together will still affect only around 0.5% of the SPA subtidal habitat (Royal
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:513:HaskoningDHV, 2015)). However, the additive effect of the sediment plumes from separate dredging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:514:sediment plumes may deter such species from migrating to and from spawning sites.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:514:the respective sediment plumes could result in an additive effect, as demonstrated in Figures 27.1 to 27.3.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:514:Significantly, the effect of a combined plume is not likely to result in a different behavioural response in fish
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:514:compared with the effect of the projects in isolation, although the increased plume footprint may increase
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:514:of the sediment plumes from separate dredging campaigns cannot be completely avoided if the campaigns
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:522:WFD water body (approximately 6.3km, see Figure 28.1) and plume modelling results described in Section
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:528: measures identified for the Tees estuary. habitats located within sediment plumes created
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532:Capital dredging within the river would result in sediment plumes. To consider the potential extent and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: BHD working to dredge the In all tidal conditions modelled, the lateral extent of the plume across the river channel
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: upper soft material in the is very narrow and the magnitude of concentrations within the plume beyond a few
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: channel. extremities of the plume, reduces further to concentrations 0-10mg/l.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: 2 Results for this stage were similar to those in Stage 1 but with separate plumes
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: separate plumes combine as they move upstream and downstream according to the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: 3 BHD working to dredge the The maximum concentrations and the spatial extents of the plume arising from Stage
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: channel. notably lower. Plume very small and located close to the dredging activity.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: 4 Again, peak concentrations close to the dredger are shown in the plume modelling
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:532: output. On the ebb phase, the plume can extend at low concentrations (<30mg/l)
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:534:represent a more conservative scenario, as sediment plume modelling outlined above indicates relatively
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:534:limited plume extents for the majority of the capital dredge for the proposed scheme.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:535:Additionally, sediment plume results for Smiths Dock monitoring point (point 3) indicated only temporary
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:535:be temporary which would disperse following cessation of the works. Plume extents during each of the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:537:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:538:zone of influence from the sediment plumes. As a result, a deterioration in ecological class status is not
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:539:peak migratory season, when a sediment plume creating a ‘barrier’ effect could cause a significant disruption
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:539:extent and impact of the plume. This allows a passage through which migratory fish will be able to move
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:539: dredging along the axis of the river to ensure the plumes are
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:544: • Cumulative effects of sediment plumes and associated effects on water quality and fish
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:545:Section 27 considers the potential cumulative effects of the proposed schemes on sediment plumes and
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:545:marine water quality. To summarise, whilst the sediment plumes could combine to cover a larger area of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:545:plumes spreading across the width of the channel. Additionally, due to navigational safety, it is unlikely that
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:549:strips thus limiting the plume extent. As a result, non- temporary effects on water quality and associated
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:550:would be sediment plumes associated with dredging simultaneously. However, on further consideration,
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:559:proposed scheme nor the modelled extent of the maximum-expected sediment plume from the capital
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:559:influence of the proposed scheme will be determined by the sediment plume during dredging activities.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:572:The capital dredging of the river will cause plumes of sediment to form. The plume effects arising from the
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:572:operation, the plume effects will be observed throughout much of the approximately five-month period, but
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:572:of sediment from the plumes on the river or seabed will be very small.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:575:requires use of TSHD and BHD on soft sediment in the channel and berth pocket) will result in plumes of
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:575:with plumes diminishing typically to levels of <30 mg/l but often <10mg/l at a distance of no more than a few
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:575:England, 2018a). The area affected by the sediment plume generated from proposed dredging, though
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:580:In terms of intra-project effects on foraging common terns, the zone of influence from the sediment plume
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:580:of the area would not be increased since the plume is considered to be the most far-reaching effect on tern
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:583:Effects on fish may be compounded by the combined sediment plumes of other projects or plans that may
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:584:An interaction between the sediment plumes would only occur in the unlikely event that the capital dredging
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:584:Plumes from each project would be temporary and short-lived. The same applies for the Anglo American
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:584:combined plumes is expected to be minor.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:584:sediment plumes occupy only half of the river cross section) has also been proposed for the NGCT project.
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:586:The zone of influence from predicted sediment plumes (including the combined plumes from the proposed
MLA_2020_00507-PC1084_RHD-ZZ-XX-RP-Z-1100_EIA Report_main body-8.pdf:593:sediment plumes arising from dredging. Construction Industry Research and Information Association
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part2-4.pdf:385: would be supported through the use of divers. There is the possibility of sediment plumes
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part2-4.pdf:386:If your activity uses or releases chemicals (for example contaminants above action level 1.There is the possibility of sediment plumes during the
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part2-4.pdf:387:outside the estuary but could delay or prevent fish There is the possibility of sediment plumes during the dredging works. Possibility of
MLA_2020_00507-PC1084-RHD-ZZ-XX-RP-Z-1100_EIA Report_Appendices_Part2-4.pdf:388: There is the possibility of sediment plumes during the dredging works
MLA_2020_00507-Licence Document (Marine)-14.pdf:14: To restrict suspended sediment plumes to one side of the estuary at a time, in order to reduce loss of tern foraging
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:8:5 Hydrodynamic and sedimentary plume modelling report
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:55: Environmental Statement. modelling and modelling of sediment plume
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:57: Environmental Statement. 2014 modelling and modelling of sediment plume released from
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:60: • Sediment plume modelling: The updated and verified 3D Tees Estuary Tidal Model was used to
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:60: coupling with a sediment plume model built in MIKE21-MT software. The sediment plume model
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:91:offshore site will both result in sediment plumes. These effects have been investigated using numerical
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:91:changes in bed thickness when the suspended sediment falls from the plume to become deposited on the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:92: represent a plume that would occur at any one point in time (such plumes are shown in the timestep
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:92: become affected by a plume at some point during the dredging or disposal activities (in some areas
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:92:or river channel). To illustrate this, Figures 6.32 – 6.35 shows the maximum extent of the plume during a
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:92:When the dredger is at the south-western end of the transect, the maximum spatial extent of the plume on
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:92:Middlesbrough Dock. When the dredger is at the north-eastern end of the transect, the extent of the plume
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:92:new quay. However, in all cases considered, the lateral extent of the plume across the river channel is very
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:92:narrow and the magnitude of the SSC within the plume beyond a few hundred metres from the point of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:92:release is of the order of 10 to 20mg/l and in the extremities of the plume reduces further to the same order
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:93:Figure 6.32 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:94:Figure 6.33 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:95:Figure 6.34 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:96:Figure 6.35 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:97:Results from this scenario are broadly similar to those from Stage 1, but now separate plumes are created
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:97:plumes can coalesce and collectively occupy around half the width of the river channel as they move
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:98:Figure 6.37 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:99:Figure 6.38 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:99:plume (at low concentrations) becomes slightly greater; (ii) the extent of the plume across the river channel
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:99:becomes wider; and (iii) at times two plumes are created by the in-parallel dredging activities. Despite these
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:100:Figures 6.40 – 6.43 shows the maximum extent of the plume during a release from the south-western corner
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:100:and the spatial extents of the plume arising from Stage 3 of the dredging are much lower than those
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:101:Figure 6.40 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:102:Figure 6.41 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:103:Figure 6.42 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:104:Figure 6.43 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:104:the maximum plume extent and maximum SSC values within the plume are much lower than experienced
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:104:during both Stages 1 and 2 of the dredging (note the slight plume shown in the mid channel is a remnant of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:104:maximum extent of the plume is confined to within the length of the proposed quay and covers only a very
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:105:phase of the tide). Figure 6.45 and 6.46 shows the maximum extent of the plume during a release from the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:105:On the ebb phase, the plume can extend at low (<30mg/l) concentrations along the jetties of the Oil Terminal
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:105:Depot. Under no conditions does the plume enter Tees Dock at any significant concentration.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:106:Figure 6.45 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:107:Figure 6.46 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:107:the plume is created at the turning circle and along parts of the north bank of the river. As with previous
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:108:The sediment plumes that arise from the four stages of the dredging could potentially affect areas of riverbed
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:108:that during the predicted four months of dredging, all individual or coalesced plume effects are confined to
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:108:Furthermore, all plumes associated with dredging of the berthing pocket and river channel in the vicinity of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:108:whilst all plumes associated with dredging of the turning circle are confined to the left bank (north of centre
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:109:No plume effects (and by implication no deposition effects) of a significant level above background values
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:110:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:110:zone of influence from the sediment plumes.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:111:Within this maximum zone of influence from sediment plumes and bed deposition, the following receptors
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:112:elevations in SSC drop rapidly after each dredging plume has dispersed, and return to baseline levels at
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:the 10-minute duration of disposal activity; and (iii) at selected intervals thereafter until the initial plume
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. It can then
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:This plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:At 30 minutes after cessation of discharge (Plot F), the plume is less than 250mg/l at its localised centre,
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:phase of the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:activity commences and starts to form its own sediment plume (Plot H), the initial plume has moved
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:sufficiently far from its point of release that it does not coalesce with the new plume and, by this time, is less
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:not visible in the plots at the magnitudes presented. The original plume continues to disperse such that
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:although when the discharge is made during the flooding tide, the plume moves in a south-easterly direction,
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:along the axis of principal tidal flows. At times when the release is around slack water, the plume tends to
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:118:west or south-east, respectively). However, when this occurs the concentration in the plume reduces readily
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:119:Figure 6.60 Plume of enhanced SSCs arising from disposal activities during Stage 1 of the capital
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:120:from the BHD (although the time intervals are greater), the initial plume has greater SSC values at its centre,
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:120:case for maximum SSC), the plume resides in spatial extent around the point of release during the slack
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:120:plume has started to move towards the south-east through advection by the flood tidal currents, and the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:120:release point (Plot F). At this point in time, the TSHD plume has further reduced in peak concentration to
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:120:around 200mg/l. Some 30 minutes later, the TSHD plume and subsequent BHD plume have fully coalesced,
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:120:with two peaks in concentration; the original TSHD plume has a peak now around 100mg/l locally at its
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:120:centre whilst the more recently formed (but smaller) BHD plume has a peak SSC value at its centre of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:120:previous TSHD release, the now fully coalesced plume has a peak SSC of around 100mg/l very locally and
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:120:plume remains present a further 45 minutes later, the original coalesced plume is considerably smaller in
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:120:successive disposal events, any coalescence of subsequent plumes would continue to result in only
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:120:coalescence of successive plumes at significant concentrations or for long durations is very low even during
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:121:Figure 6.61 Plume of enhanced SSCs arising from disposal activities during Stage 2 of the capital
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:122:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. The
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:122:plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:122:The plumes associated with Stage 3 disposal activities are generally lower in concentration than those for
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:122:Indeed, the plume arising from Stage 3 disposal activities fully disperses before the next subsequent
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:122:in this offshore area). Due to this, there is no possibility of plumes coalescing from Stage 3 disposal
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:123:Figure 6.4 Plume of enhanced SSCs arising from disposal activities during Stage 3 of the capital
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:124:Like during Stage 2, there is potential for the plume from a TSHD discharge to coalesce with a preceding or
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:124:Plot A shows the residual plume from a TSHD disposal some 5 minutes before the commencement of a
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:124:separate plumes at 45 minutes after cessation of the BHD discharge. A further 30 minutes later, another
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:124:TSHD release occurs within the previous BHD plume extent (Plot E). Peak concentrations from the TSHD
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:124:plume has widely dispersed, a further BHD release is made some 50 minutes later, again within the previous
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:124:(now coalesced) plumes. Despite this coalesced plume now containing elements of three separate
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:124:the residual plume shown in Plot A coalesce with the ‘three-release’ plume (Plot G), although the SSC
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:124:values at the point of overlap are very low (~10mg/l). Around 55 minutes later, the plume is now mostly
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:124:disposal site, leading to coalescence of subsequent plumes, the resulting temporary, short duration effects
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:125:Figure 6.5 Plume of enhanced SSCs arising from disposal activities during Stage 4 of the capital
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:126:for coalescence of subsequent plumes is greatest. In reality, subsequent disposals will be at different parts
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:126:At the extremities of the plume extent, there are wide zones of relatively low SSC values (<100mg/l).
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:126:sediment plume associated with one release event (this example being from Stage 1). It can be seen that
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:126:is negligible, whilst to the north it covers a similar zone to the sediment plume for this disposal event, which
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:130:the northern and southern boundaries (Figure 6.68). This correlates to the areas where a plume will extend
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:131:The river dredging and offshore disposal activities will both cause plumes of sediment to form close to the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:131:release point of material into the water column. These plumes will disperse under wave and current action
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:131:Once a plume is generated, the highest SSC values will be recorded at the point of river dredging or offshore
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:131:advected away from the point of release by the prevailing currents. At the peripheries of each plume, the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:131:working in parallel, there could be instances where two separately formed plumes coalesce to form one
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:131:(spatially) larger plume. However, the same principles of dispersion by prevailing currents applies, with
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:132:The plume effects arising from the river dredging are characterised by a short-lived localised increase in
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:132:plume effects will be observed throughout much of the approximately four-month period, but at varying
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:132:extents during the four different stages. During Stages 1-3 the dredging-related plume effects will be largely
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:132:Dock and Tees Dock. During Stage 4 the dredging-related plume effects will be largely confined to the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:132:very minor magnitudes, in areas covering the same spatial extent as the sediment plumes. Where this
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:132:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:132:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected by tidal currents
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:143: the findings of hydrodynamic and sedimentary plume
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:143: sediment and create smothering effects / turbidity / sediment plumes.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:144:are predicted to occur (e.g. sediment plumes generated during capital dredging and effects on tidal currents
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:157:Capital dredging would result in the creation of sediment plumes. To consider the potential extent and
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:157:In all tidal conditions modelled, the lateral extent of the plume across the river channel is very narrow and
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:157:the magnitude of concentrations within the plume beyond a few hundred metres from the point of release is
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:157:in the order of 10 - 20mg/l and in the extremities of the plume, reduces further to concentrations 0-10mg/l
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:157:Results for this stage were similar to those in Stage 1 but with separate plumes created by the different
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:157:dredgers. At some points in the cycle, areas of these initially separate plumes combine as they move
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:157:The maximum concentrations and the spatial extents of the plume arising from Stage 3 of the dredging are
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:157:and the production rate of dredging is notably lower. Figure 7.5 shows an example plume during Stage 3
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:157:Again, peak concentrations close to the dredger are shown in the plume modelling output. On the ebb
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:157:phase, the plume can extend at low concentrations (<30mg/l) along the jetties of the Oil Terminal towards
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:158:Figure 7. 3 Plume of suspended sediment concentrations arising from dredging activities during Stage 2
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:159:Figure 7. 4 Plume arising from dredging activities during Stage 1 of the capital dredge (release from the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:160:Figure 7. 5 Plume of suspended sediment concentrations arising from dredging activities during Stage
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:161:Figure 7.6 Plume of enhanced suspended sediment concentrations arising from dredging activities
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:162:sediment plume is not predicted to reach The Gares water quality monitoring point, no effects on the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:162:The relatively limited nature of the plume extents predicted for the proposed capital dredging indicates that
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:166:Additionally, information from sediment plume modelling (see Section 7.5.1) indicates that only the Smiths
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:194:hydrodynamic and sedimentary plume modelling undertaken. This section excludes consideration of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:210:In general, sediment plumes induced by dredging are considered to pose only a limited risk to water quality
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:210:dredging periods. The sediment plume generated by dredging would likely be dispersed by tidal currents
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:211:immediate vicinity of the dredger. Sediment plume modelling predicts different plume extents and
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:211:cases, the sediment plume is predicted to be very narrow within the river, with the phase of dredging with
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:211:extremities of the plume.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:211:All plumes associated with different stages of dredging in the vicinity of the proposed new quay are confined
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:211:to the southern bank of the river, whilst all plumes associated with dredging of the turning circle are confined
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:211:to the northern bank. No plume effects of a significant level above background values are anticipated to
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:211:The sediment plume modelling reported within Section 6 also extracted time series plots of changes in SSC
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:212:from the sediment plumes.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:212:(deposition) from the sediment plume model were extracted at a series of points within the affected river
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:256: hydrodynamic and sedimentary plume effects would not extend to
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:257: hydrodynamic and sedimentary plume effects would not extend to
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:296:In summary, the largest sediment plumes are likely to arise during Stage 2 of the dredging (i.e. BHD and
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:296:(it is not a sediment plume, rather a combined zone of influence). The sediment dispersion modelling of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:296:distance from the dredging vessel, both laterally and along the line of the vessel, with plumes diminishing
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:296:of this assessment, the sediment plume may be regarded as representing a temporary loss of foraging
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:297:terns do not forage to any significant extent within the predicted range of the sediment plume. Likewise, the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:297:England, 2018a), and the area likely to be affected by the sediment plume at any one time represents around
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:297:available even if the plume does result in temporary occlusion from the affected area. Furthermore, SSC
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:298:and the other stages of the dredge campaign would result in a smaller plume than that described for Stage
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:298: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:298: plume generated by operations is predicted to collectively occupy around half the width of the river
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:298:With the implementation of the above mitigation measure, the modelled plume would only occupy half of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:309:informed by the hydrodynamic and sedimentary plume modelling undertaken, as well as the understanding
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:318:details of the increase in SSC, including the visual output of sediment plume modelling for the capital
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:319:sediment plume creating a ‘barrier’ effect could cause a significant disruption to the annual migration pattern,
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:319:during a period of very hot and dry weather. Modelling of the sediment plume during capital dredging
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:320:vessel, both laterally and along the line of the vessel. The periphery of the plume (10 to 20 mg/l) extends
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:320:The cross section of the river channel affected by the plume is particularly relevant when considering
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:320:narrow plume along the axis of the river.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:320:period. However, while unlikely, it has to be taken into account that sediment plumes encompassing the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:320: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:320: plume generated by operations is predicted to remain on the same side of the river as the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:320:Mitigation of the plume effects by reducing the size of the TSHD, and thus reducing the rate of overflow, is
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:424:well as hydrodynamic and sedimentary plume modelling reported in Section 6.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:478:As the offshore disposal commences, a plume of sediment would be generated with the greatest
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:478:concentrations predicted at the end of the discharge period. The sediment plume is predicted to increase
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:478:At 30 minutes after cessation of discharge, the plume is less than 250mg/l at its localised centre, reducing
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:478:the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of less than
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:478:commences and starts to form its own sediment plume, the initial plume has moved sufficiently far from its
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:478:point of release that it does not coalesce with the new plume and, by this time, is less than 40mg/l in SSC
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:478:at the magnitudes presented. The original plume continues to disperse such that after 4 hours and 25
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:478:At times when the release is around slack water, the plume tends to reside closer to the point of release for
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:478:However, when this occurs the concentration in the plume reduces readily because more material falls to
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:479:Based on the modelled effects of the sediment plume at the Tees Bay C disposal site described above, it is
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:490: influencing the same area as affected by the sediment plume); and,
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:491:the basis of the potential extent of the dredging and disposal plumes.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:500:All projects scoped into the CIA involve will involve capital dredging. This activity will create a plume of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:500:The extent of the sediment plume created by capital dredging is heavily dependent on the dredging plant
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:501:important to note that figures showing the “maximum extent of sediment plume dispersion and deposition”
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:501:do not represent a plume that would occur at any one point in time (such plumes are shown in the timestep
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:501:affected by a plume at some point during the dredging or disposal activities (in some areas this will be on a
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:501:Consequently, for the purposes of this CIA, the maximum zones of influence of sediment plume dispersion
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:501:of sediment plume dispersion and deposition onto the river and/or seabed during capital dredging
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:501:sediment in the water column was predicted to be in close proximity to the dredger, with plume dispersion
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:501:resulting in a significantly reduced concentration of suspended sediment beyond the source of the plume.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:501:material will be re-dredged as part of the capital works for each scheme. At the peripheries of each plume,
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:502:(right) as a result of the proposed scheme [Note: plots show sediment plume impacts arising from dredging
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:506:addition, the predictions made for each project represent sediment plume dispersion under specific tidal
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:506:where sediment plumes combine at peak concentration (as predicted by the EIA studies for each project)
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:506:at any location. Additionally, mitigation is outlined for all three schemes which would reduce plume extents
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:506:proposed scheme, it is considered unlikely that the plumes would overlap. As a result, there may be a
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:506:additional mitigation measures are identified to reduce any resulting sediment plume as far as possible and
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:507:plumes.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:507:(deposition) from the sediment plume model were extracted at a series of points within the affected river
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:513:plumes occupy only half of the river cross section) has also been proposed for the NGCT project. For the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:513:England, 2018a), the area affected even by the combined plumes is likely to be low (for example, should
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:513:dredging plumes together will still affect only around 0.5% of the SPA subtidal habitat (Royal
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:513:HaskoningDHV, 2015)). However, the additive effect of the sediment plumes from separate dredging
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:514:sediment plumes may deter such species from migrating to and from spawning sites.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:514:the respective sediment plumes could result in an additive effect, as demonstrated in Figures 27.1 to 27.3.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:514:Significantly, the effect of a combined plume is not likely to result in a different behavioural response in fish
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:514:compared with the effect of the projects in isolation, although the increased plume footprint may increase
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:514:of the sediment plumes from separate dredging campaigns cannot be completely avoided if the campaigns
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:522:WFD water body (approximately 6.3km, see Figure 28.1) and plume modelling results described in Section
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:528: measures identified for the Tees estuary. habitats located within sediment plumes created
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:532:Capital dredging within the river would result in sediment plumes. To consider the potential extent and
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:532: BHD working to dredge the In all tidal conditions modelled, the lateral extent of the plume across the river channel
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:532: upper soft material in the is very narrow and the magnitude of concentrations within the plume beyond a few
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:532: channel. extremities of the plume, reduces further to concentrations 0-10mg/l.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:532: 2 Results for this stage were similar to those in Stage 1 but with separate plumes
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:532: separate plumes combine as they move upstream and downstream according to the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:532: 3 BHD working to dredge the The maximum concentrations and the spatial extents of the plume arising from Stage
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:532: channel. notably lower. Plume very small and located close to the dredging activity.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:532: 4 Again, peak concentrations close to the dredger are shown in the plume modelling
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:532: output. On the ebb phase, the plume can extend at low concentrations (<30mg/l)
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:534:represent a more conservative scenario, as sediment plume modelling outlined above indicates relatively
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:534:limited plume extents for the majority of the capital dredge for the proposed scheme.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:535:Additionally, sediment plume results for Smiths Dock monitoring point (point 3) indicated only temporary
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:535:be temporary which would disperse following cessation of the works. Plume extents during each of the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:537:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:538:zone of influence from the sediment plumes. As a result, a deterioration in ecological class status is not
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:539:peak migratory season, when a sediment plume creating a ‘barrier’ effect could cause a significant disruption
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:539:extent and impact of the plume. This allows a passage through which migratory fish will be able to move
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:539: dredging along the axis of the river to ensure the plumes are
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:544: • Cumulative effects of sediment plumes and associated effects on water quality and fish
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:545:Section 27 considers the potential cumulative effects of the proposed schemes on sediment plumes and
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:545:marine water quality. To summarise, whilst the sediment plumes could combine to cover a larger area of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:545:plumes spreading across the width of the channel. Additionally, due to navigational safety, it is unlikely that
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:549:strips thus limiting the plume extent. As a result, non- temporary effects on water quality and associated
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:550:would be sediment plumes associated with dredging simultaneously. However, on further consideration,
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:559:proposed scheme nor the modelled extent of the maximum-expected sediment plume from the capital
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:559:influence of the proposed scheme will be determined by the sediment plume during dredging activities.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:572:The capital dredging of the river will cause plumes of sediment to form. The plume effects arising from the
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:572:operation, the plume effects will be observed throughout much of the approximately five-month period, but
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:572:of sediment from the plumes on the river or seabed will be very small.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:575:requires use of TSHD and BHD on soft sediment in the channel and berth pocket) will result in plumes of
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:575:with plumes diminishing typically to levels of <30 mg/l but often <10mg/l at a distance of no more than a few
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:575:England, 2018a). The area affected by the sediment plume generated from proposed dredging, though
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:580:In terms of intra-project effects on foraging common terns, the zone of influence from the sediment plume
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:580:of the area would not be increased since the plume is considered to be the most far-reaching effect on tern
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:583:Effects on fish may be compounded by the combined sediment plumes of other projects or plans that may
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:584:An interaction between the sediment plumes would only occur in the unlikely event that the capital dredging
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:584:Plumes from each project would be temporary and short-lived. The same applies for the Anglo American
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:584:combined plumes is expected to be minor.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:584:sediment plumes occupy only half of the river cross section) has also been proposed for the NGCT project.
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:586:The zone of influence from predicted sediment plumes (including the combined plumes from the proposed
R-2020-0371-SCP-PC1084_R-2020-0371-SCP-RHD-ZZ-XX-RP-Z-1100_EIA_Report_main_body-from-gov-uk.pdf:593:sediment plumes arising from dredging. Construction Industry Research and Information Association
R-2020-0371-SCP-EA R_2020_0371_SCP 14 August 2020 OFFICIAL.pdf:3:The plume modelling will be especially helpful in understanding the impacts to fish within
R-2020-0371-SCP-PC1084-RHD-SB-EN-NT-EV-1106.pdf:11:from the proposed dredging and disposal activity by coupling a sediment plume model built in MIKE21-MT
R-2020-0371-SCP-PC1084-RHD-SB-EN-NT-EV-1106.pdf:13:hydrodynamic and sedimentary regime assessment (particularly the plume dispersion modelling to
R-2020-0371-SCP-PC1084-RHD-SB-EN-NT-EV-1106.pdf:15:sediment plume modelling will, however, be used to inform impacts to water quality as a result of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:3:informed by the hydrodynamic and sedimentary plume modelling undertaken, as well as the understanding
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:12:details of the increase in SSC, including the visual output of sediment plume modelling for the capital
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:13:sediment plume creating a ‘barrier’ effect could cause a significant disruption to the annual migration pattern,
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:13:during a period of very hot and dry weather. Modelling of the sediment plume during capital dredging
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14:vessel, both laterally and along the line of the vessel. The periphery of the plume (10 to 20 mg/l) extends
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14:The cross section of the river channel affected by the plume is particularly relevant when considering
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14:narrow plume along the axis of the river.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14:period. However, while unlikely, it has to be taken into account that sediment plumes encompassing the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14: plume generated by operations is predicted to remain on the same side of the river as the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_13. Fish and fisheries.pdf:14:Mitigation of the plume effects by reducing the size of the TSHD, and thus reducing the rate of overflow, is
R-2020-0684-ESM-PC1084-RHD-SB-EN-NT-EV-1106_Appendix 2_Scoping note.pdf:11:from the proposed dredging and disposal activity by coupling a sediment plume model built in MIKE21-MT
R-2020-0684-ESM-PC1084-RHD-SB-EN-NT-EV-1106_Appendix 2_Scoping note.pdf:13:hydrodynamic and sedimentary regime assessment (particularly the plume dispersion modelling to
R-2020-0684-ESM-PC1084-RHD-SB-EN-NT-EV-1106_Appendix 2_Scoping note.pdf:15:sediment plume modelling will, however, be used to inform impacts to water quality as a result of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:4:hydrodynamic and sedimentary plume modelling undertaken. This section excludes consideration of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:20:In general, sediment plumes induced by dredging are considered to pose only a limited risk to water quality
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:20:dredging periods. The sediment plume generated by dredging would likely be dispersed by tidal currents
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:immediate vicinity of the dredger. Sediment plume modelling predicts different plume extents and
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:cases, the sediment plume is predicted to be very narrow within the river, with the phase of dredging with
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:extremities of the plume.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:All plumes associated with different stages of dredging in the vicinity of the proposed new quay are confined
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:to the southern bank of the river, whilst all plumes associated with dredging of the turning circle are confined
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:to the northern bank. No plume effects of a significant level above background values are anticipated to
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:21:The sediment plume modelling reported within Section 6 also extracted time series plots of changes in SSC
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:22:from the sediment plumes.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_9. Marine ecology.pdf:22:(deposition) from the sediment plume model were extracted at a series of points within the affected river
R-2020-0684-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:The capital dredging of the river and the offshore disposal of dredged sediments both will cause plumes of
R-2020-0684-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:sediment to form. The plume effects arising from the river dredging are characterised by a short-lived
R-2020-0684-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:following hours. Since the dredging is a near-continuous operation, the plume effects will be observed
R-2020-0684-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
R-2020-0684-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected from the offshore
R-2020-0684-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:11:magnitude over a few hours after disposal. Deposition thicknesses of sediment from the plumes on the river
R-2020-0684-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:12:exceeding water quality standards was deemed to be low. Additionally, sediment plume modelling shows
R-2020-0684-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:12:resuspension of sediments. Such measures include dredging in long strips to ensure the plume is located
R-2020-0684-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:13:scheme footprint and the results of the hydrodynamic and sediment plume modelling, an impact of minor
R-2020-0684-ESM-PC1084-RHD-ZZ-XX-RP-Z-1108_NTS.pdf:20:Based on the findings of hydrodynamic and sedimentary plume modelling, the disposal of dredged material
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:1: influencing the same area as affected by the sediment plume); and,
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:2:the basis of the potential extent of the dredging and disposal plumes.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:11:All projects scoped into the CIA involve will involve capital dredging. This activity will create a plume of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:11:The extent of the sediment plume created by capital dredging is heavily dependent on the dredging plant
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:important to note that figures showing the “maximum extent of sediment plume dispersion and deposition”
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:do not represent a plume that would occur at any one point in time (such plumes are shown in the timestep
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:affected by a plume at some point during the dredging or disposal activities (in some areas this will be on a
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:Consequently, for the purposes of this CIA, the maximum zones of influence of sediment plume dispersion
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:of sediment plume dispersion and deposition onto the river and/or seabed during capital dredging
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:sediment in the water column was predicted to be in close proximity to the dredger, with plume dispersion
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:resulting in a significantly reduced concentration of suspended sediment beyond the source of the plume.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:12:material will be re-dredged as part of the capital works for each scheme. At the peripheries of each plume,
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:13:(right) as a result of the proposed scheme [Note: plots show sediment plume impacts arising from dredging
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:17:addition, the predictions made for each project represent sediment plume dispersion under specific tidal
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:17:where sediment plumes combine at peak concentration (as predicted by the EIA studies for each project)
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:17:at any location. Additionally, mitigation is outlined for all three schemes which would reduce plume extents
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:17:proposed scheme, it is considered unlikely that the plumes would overlap. As a result, there may be a
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:17:additional mitigation measures are identified to reduce any resulting sediment plume as far as possible and
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:18:plumes.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:18:(deposition) from the sediment plume model were extracted at a series of points within the affected river
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:24:plumes occupy only half of the river cross section) has also been proposed for the NGCT project. For the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:24:England, 2018a), the area affected even by the combined plumes is likely to be low (for example, should
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:24:dredging plumes together will still affect only around 0.5% of the SPA subtidal habitat (Royal
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:24:HaskoningDHV, 2015)). However, the additive effect of the sediment plumes from separate dredging
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:25:sediment plumes may deter such species from migrating to and from spawning sites.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:25:the respective sediment plumes could result in an additive effect, as demonstrated in Figures 27.1 to 27.3.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:25:Significantly, the effect of a combined plume is not likely to result in a different behavioural response in fish
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:25:compared with the effect of the projects in isolation, although the increased plume footprint may increase
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_27. Cumulative impact assessment.pdf:25:of the sediment plumes from separate dredging campaigns cannot be completely avoided if the campaigns
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_1. Introduction.pdf:8:5 Hydrodynamic and sedimentary plume modelling report
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_20. Flood risk and coastal defence.pdf:4:well as hydrodynamic and sedimentary plume modelling reported in Section 6.
R-2020-0684-ESM-EIA_Scoping_Response_EIA201900017_FINAL.pdf:11:create smothering effects/turbidity/sediment plumes, thereby damaging benthic
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_11. Terrestrial ecology.pdf:13: hydrodynamic and sedimentary plume effects would not extend to
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_11. Terrestrial ecology.pdf:14: hydrodynamic and sedimentary plume effects would not extend to
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:1:Hydro-dynamic and sedimentary plume modelling
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:9: a sediment plume model built in MIKE3-MT software. The sediment plume model was run for the entire
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:63:plume dispersion model are described in this section.
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:67:The following assumptions have been made for the simulation of sediment plumes arising from dredging
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:70: to note that this type of figure does not represent a plume or deposition that would occur at any one
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:70: point in time (such plumes or deposition are shown in the animated timestep plots). Rather, this
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:70: affected by a plume or deposition at some point during the 4-months of dredging or disposal
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:72:although: (i) the lateral extent of the plume (at low concentrations) becomes slightly greater; (ii) the extent
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:72:of the plume across the river channel becomes wider; and (iii) at times two plumes are created by the in-
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:73:that during Stage 3 of the dredging, the maximum plume extent and maximum SSC values within the plume
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:73:are much lower than experienced during both Stage 1 and 2 of the dredging (note the slight plume shown
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:73:commences). During Stage 3, the maximum extent of the plume is confined to within the length of the
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:74:that during Stage 4 of the dredging, the plume is created at the turning circle and along parts of the north
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:75:and that during the 4 months of dredging, all plume effects are confined to within the river reaches that
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:75:Furthermore, all plumes associated with dredging of the berthing pocket and river channel in the vicinity of
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:75:plumes associated with dredging of the turning circle are confined to the left bank (north of centre line)
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:75:No plume effects (and by implication no deposition effects) of a significant level above background values
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:77:the plumes created by river dredging. It can be seen that much of the sediment falls to the bed within the
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:77:that is affected by the zone of influence from the sediment plumes.
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:78:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:78:single release point and the potential for coalescence of subsequent depositional plumes is greatest. In
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:78:a few km of the upstream and downstream boundaries. At the extremities of the plume extent, there are
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:78:sediment plume for this worst case. It can be seen that much of the sediment falls to the bed within the
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:78:similar zone to the sediment plume. In reality, disposals will be at different points within the licensed area,
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:80:The river dredging and offshore disposal activities will both cause plumes of sediment to form close to the
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:80:release point of material into the water column. These plumes will disperse under wave and current action
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:80:Once a plume is generated, the highest SSC values will be recorded at the point of river dredging or offshore
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:advected away from the point of release by the prevailing currents. At the peripheries of each plume, the
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:working in parallel, there could be instances where two separately formed plumes coalesce to form one
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:(spatially) larger plume. However, the same principles of dispersion by prevailing currents applies, with
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:The plume effects arising from the river dredging are characterised by a short-lived localised increase in
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:plume effects will be observed throughout much the 4-month period, but at varying extents during the four
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:different stages. During Stages 1-3 the dredging-related plume effects will be largely confined to the channel
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:During Stage 4 the dredging-related plume effects will be largely confined to the channel areas north of the
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:areas covering the same spatial extent as the sediment plumes. Where this occurs in the river channel or
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
R-2020-0684-ESM-Appendix 5_Hydro-dynamic and sedimentary plume modelling report.pdf:81:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected by tidal currents
R-2020-0684-ESM-Officer Report 0684.pdf:20:relatively limited nature of the plume extents predicted for the proposed
R-2020-0684-ESM-Officer Report 0684.pdf:44:reduce both the extent and impact of the dredged plume, as any plume
R-2020-0684-ESM-Officer Report 0684.pdf:92:plume at the disposal site concludes that there is limited potential for an
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:2: the findings of hydrodynamic and sedimentary plume
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:2: sediment and create smothering effects / turbidity / sediment plumes.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:3:are predicted to occur (e.g. sediment plumes generated during capital dredging and effects on tidal currents
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:Capital dredging would result in the creation of sediment plumes. To consider the potential extent and
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:In all tidal conditions modelled, the lateral extent of the plume across the river channel is very narrow and
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:the magnitude of concentrations within the plume beyond a few hundred metres from the point of release is
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:in the order of 10 - 20mg/l and in the extremities of the plume, reduces further to concentrations 0-10mg/l
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:Results for this stage were similar to those in Stage 1 but with separate plumes created by the different
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:dredgers. At some points in the cycle, areas of these initially separate plumes combine as they move
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:The maximum concentrations and the spatial extents of the plume arising from Stage 3 of the dredging are
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:and the production rate of dredging is notably lower. Figure 7.5 shows an example plume during Stage 3
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:Again, peak concentrations close to the dredger are shown in the plume modelling output. On the ebb
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:16:phase, the plume can extend at low concentrations (<30mg/l) along the jetties of the Oil Terminal towards
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:17:Figure 7. 3 Plume of suspended sediment concentrations arising from dredging activities during Stage 2
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:18:Figure 7. 4 Plume arising from dredging activities during Stage 1 of the capital dredge (release from the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:19:Figure 7. 5 Plume of suspended sediment concentrations arising from dredging activities during Stage
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:20:Figure 7.6 Plume of enhanced suspended sediment concentrations arising from dredging activities
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:21:sediment plume is not predicted to reach The Gares water quality monitoring point, no effects on the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:21:The relatively limited nature of the plume extents predicted for the proposed capital dredging indicates that
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_7. Marine sediment and water quality.pdf:25:Additionally, information from sediment plume modelling (see Section 7.5.1) indicates that only the Smiths
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:9:proposed scheme nor the modelled extent of the maximum-expected sediment plume from the capital
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:9:influence of the proposed scheme will be determined by the sediment plume during dredging activities.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:22:The capital dredging of the river will cause plumes of sediment to form. The plume effects arising from the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:22:operation, the plume effects will be observed throughout much of the approximately five-month period, but
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:22:of sediment from the plumes on the river or seabed will be very small.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:25:requires use of TSHD and BHD on soft sediment in the channel and berth pocket) will result in plumes of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:25:with plumes diminishing typically to levels of <30 mg/l but often <10mg/l at a distance of no more than a few
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:25:England, 2018a). The area affected by the sediment plume generated from proposed dredging, though
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:30:In terms of intra-project effects on foraging common terns, the zone of influence from the sediment plume
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:30:of the area would not be increased since the plume is considered to be the most far-reaching effect on tern
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:33:Effects on fish may be compounded by the combined sediment plumes of other projects or plans that may
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:34:An interaction between the sediment plumes would only occur in the unlikely event that the capital dredging
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:34:Plumes from each project would be temporary and short-lived. The same applies for the Anglo American
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:34:combined plumes is expected to be minor.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:34:sediment plumes occupy only half of the river cross section) has also been proposed for the NGCT project.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_29. Habitats Regulations Assessment.pdf:36:The zone of influence from predicted sediment plumes (including the combined plumes from the proposed
R-2020-0684-ESM-Appendix 16_WFD scoping tables.pdf:2: would be supported through the use of divers. There is the possibility of sediment plumes
R-2020-0684-ESM-Appendix 16_WFD scoping tables.pdf:3:If your activity uses or releases chemicals (for example contaminants above action level 1.There is the possibility of sediment plumes during the
R-2020-0684-ESM-Appendix 16_WFD scoping tables.pdf:4:outside the estuary but could delay or prevent fish There is the possibility of sediment plumes during the dredging works. Possibility of
R-2020-0684-ESM-Appendix 16_WFD scoping tables.pdf:5: There is the possibility of sediment plumes during the dredging works
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_30. References.pdf:6:sediment plumes arising from dredging. Construction Industry Research and Information Association
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:1:WFD water body (approximately 6.3km, see Figure 28.1) and plume modelling results described in Section
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:7: measures identified for the Tees estuary. habitats located within sediment plumes created
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11:Capital dredging within the river would result in sediment plumes. To consider the potential extent and
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: BHD working to dredge the In all tidal conditions modelled, the lateral extent of the plume across the river channel
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: upper soft material in the is very narrow and the magnitude of concentrations within the plume beyond a few
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: channel. extremities of the plume, reduces further to concentrations 0-10mg/l.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: 2 Results for this stage were similar to those in Stage 1 but with separate plumes
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: separate plumes combine as they move upstream and downstream according to the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: 3 BHD working to dredge the The maximum concentrations and the spatial extents of the plume arising from Stage
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: channel. notably lower. Plume very small and located close to the dredging activity.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: 4 Again, peak concentrations close to the dredger are shown in the plume modelling
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:11: output. On the ebb phase, the plume can extend at low concentrations (<30mg/l)
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:13:represent a more conservative scenario, as sediment plume modelling outlined above indicates relatively
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:13:limited plume extents for the majority of the capital dredge for the proposed scheme.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:14:Additionally, sediment plume results for Smiths Dock monitoring point (point 3) indicated only temporary
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:14:be temporary which would disperse following cessation of the works. Plume extents during each of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:16:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:17:zone of influence from the sediment plumes. As a result, a deterioration in ecological class status is not
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:18:peak migratory season, when a sediment plume creating a ‘barrier’ effect could cause a significant disruption
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:18:extent and impact of the plume. This allows a passage through which migratory fish will be able to move
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:18: dredging along the axis of the river to ensure the plumes are
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:23: • Cumulative effects of sediment plumes and associated effects on water quality and fish
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:24:Section 27 considers the potential cumulative effects of the proposed schemes on sediment plumes and
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:24:marine water quality. To summarise, whilst the sediment plumes could combine to cover a larger area of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:24:plumes spreading across the width of the channel. Additionally, due to navigational safety, it is unlikely that
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:28:strips thus limiting the plume extent. As a result, non- temporary effects on water quality and associated
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_28. Water Framework Directive compliance assessment.pdf:29:would be sediment plumes associated with dredging simultaneously. However, on further consideration,
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:As the offshore disposal commences, a plume of sediment would be generated with the greatest
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:concentrations predicted at the end of the discharge period. The sediment plume is predicted to increase
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:At 30 minutes after cessation of discharge, the plume is less than 250mg/l at its localised centre, reducing
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of less than
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:commences and starts to form its own sediment plume, the initial plume has moved sufficiently far from its
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:point of release that it does not coalesce with the new plume and, by this time, is less than 40mg/l in SSC
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:at the magnitudes presented. The original plume continues to disperse such that after 4 hours and 25
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:At times when the release is around slack water, the plume tends to reside closer to the point of release for
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:1:However, when this occurs the concentration in the plume reduces readily because more material falls to
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_26. Offshore disposal of dredged material.pdf:2:Based on the modelled effects of the sediment plume at the Tees Bay C disposal site described above, it is
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:27:In summary, the largest sediment plumes are likely to arise during Stage 2 of the dredging (i.e. BHD and
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:27:(it is not a sediment plume, rather a combined zone of influence). The sediment dispersion modelling of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:27:distance from the dredging vessel, both laterally and along the line of the vessel, with plumes diminishing
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:27:of this assessment, the sediment plume may be regarded as representing a temporary loss of foraging
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:28:terns do not forage to any significant extent within the predicted range of the sediment plume. Likewise, the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:28:England, 2018a), and the area likely to be affected by the sediment plume at any one time represents around
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:28:available even if the plume does result in temporary occlusion from the affected area. Furthermore, SSC
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:29:and the other stages of the dredge campaign would result in a smaller plume than that described for Stage
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:29: the width of the river. This is to reduce both the extent and impact of the dredged plume, as any
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:29: plume generated by operations is predicted to collectively occupy around half the width of the river
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_12. Marine and coastal ornithology.pdf:29:With the implementation of the above mitigation measure, the modelled plume would only occupy half of the
R-2020-0684-ESM-61586 Quay Planning Statement 09-11-20.pdf:24: sediment plume modelling, an impact of minor adverse significance is predicted with regard to
R-2020-0684-ESM-61586 Quay Planning Statement 09-11-20.pdf:30: Additionally, sediment plume modelling shows relatively limited areas of high suspended solids
R-2020-0684-ESM-61586 Quay Planning Statement 09-11-20.pdf:30: dredging in long strips to ensure the plume is located only on one side of the channel at a time
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:5: Environmental Statement. modelling and modelling of sediment plume
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:7: Environmental Statement. 2014 modelling and modelling of sediment plume released from
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:10: • Sediment plume modelling: The updated and verified 3D Tees Estuary Tidal Model was used to
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:10: coupling with a sediment plume model built in MIKE21-MT software. The sediment plume model
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:41:offshore site will both result in sediment plumes. These effects have been investigated using numerical
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:41:changes in bed thickness when the suspended sediment falls from the plume to become deposited on the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42: represent a plume that would occur at any one point in time (such plumes are shown in the timestep
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42: become affected by a plume at some point during the dredging or disposal activities (in some areas
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:or river channel). To illustrate this, Figures 6.32 – 6.35 shows the maximum extent of the plume during a
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:When the dredger is at the south-western end of the transect, the maximum spatial extent of the plume on
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:Middlesbrough Dock. When the dredger is at the north-eastern end of the transect, the extent of the plume
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:new quay. However, in all cases considered, the lateral extent of the plume across the river channel is very
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:narrow and the magnitude of the SSC within the plume beyond a few hundred metres from the point of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:42:release is of the order of 10 to 20mg/l and in the extremities of the plume reduces further to the same order
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:43:Figure 6.32 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:44:Figure 6.33 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:45:Figure 6.34 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:46:Figure 6.35 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 1 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:47:Results from this scenario are broadly similar to those from Stage 1, but now separate plumes are created
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:47:plumes can coalesce and collectively occupy around half the width of the river channel as they move
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:48:Figure 6.37 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:49:Figure 6.38 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 2 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:49:plume (at low concentrations) becomes slightly greater; (ii) the extent of the plume across the river channel
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:49:becomes wider; and (iii) at times two plumes are created by the in-parallel dredging activities. Despite these
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:50:Figures 6.40 – 6.43 shows the maximum extent of the plume during a release from the south-western corner
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:50:and the spatial extents of the plume arising from Stage 3 of the dredging are much lower than those
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:51:Figure 6.40 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:52:Figure 6.41 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:53:Figure 6.42 (Plot C) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:54:Figure 6.43 (Plot D) – Plume of enhanced SSCs arising from dredging activities during Stage 3 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:54:the maximum plume extent and maximum SSC values within the plume are much lower than experienced
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:54:during both Stages 1 and 2 of the dredging (note the slight plume shown in the mid channel is a remnant of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:54:maximum extent of the plume is confined to within the length of the proposed quay and covers only a very
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:55:phase of the tide). Figure 6.45 and 6.46 shows the maximum extent of the plume during a release from the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:55:On the ebb phase, the plume can extend at low (<30mg/l) concentrations along the jetties of the Oil Terminal
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:55:Depot. Under no conditions does the plume enter Tees Dock at any significant concentration.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:56:Figure 6.45 (Plot A) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:57:Figure 6.46 (Plot B) – Plume of enhanced SSCs arising from dredging activities during Stage 4 of the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:57:the plume is created at the turning circle and along parts of the north bank of the river. As with previous
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:58:The sediment plumes that arise from the four stages of the dredging could potentially affect areas of riverbed
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:58:that during the predicted four months of dredging, all individual or coalesced plume effects are confined to
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:58:Furthermore, all plumes associated with dredging of the berthing pocket and river channel in the vicinity of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:58:whilst all plumes associated with dredging of the turning circle are confined to the left bank (north of centre
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:59:No plume effects (and by implication no deposition effects) of a significant level above background values
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:60:Sediment suspended within the dredging plumes will fall to the riverbed, either soon after disturbance or
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:60:zone of influence from the sediment plumes.
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:61:Within this maximum zone of influence from sediment plumes and bed deposition, the following receptors
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:62:elevations in SSC drop rapidly after each dredging plume has dispersed, and return to baseline levels at
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:Therefore, plumes arising from disposal activities and subsequent sediment deposition is unlikely to be of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:the 10-minute duration of disposal activity; and (iii) at selected intervals thereafter until the initial plume
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. It can then
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:This plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:At 30 minutes after cessation of discharge (Plot F), the plume is less than 250mg/l at its localised centre,
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:phase of the tide such that 1 hour after cessation of discharge (Plot G), the plume has a maximum SSC of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:activity commences and starts to form its own sediment plume (Plot H), the initial plume has moved
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:sufficiently far from its point of release that it does not coalesce with the new plume and, by this time, is less
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:not visible in the plots at the magnitudes presented. The original plume continues to disperse such that
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:although when the discharge is made during the flooding tide, the plume moves in a south-easterly direction,
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:along the axis of principal tidal flows. At times when the release is around slack water, the plume tends to
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:68:west or south-east, respectively). However, when this occurs the concentration in the plume reduces readily
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:69:Figure 6.60 Plume of enhanced SSCs arising from disposal activities during Stage 1 of the capital
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:from the BHD (although the time intervals are greater), the initial plume has greater SSC values at its centre,
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:case for maximum SSC), the plume resides in spatial extent around the point of release during the slack
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:plume has started to move towards the south-east through advection by the flood tidal currents, and the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:release point (Plot F). At this point in time, the TSHD plume has further reduced in peak concentration to
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:around 200mg/l. Some 30 minutes later, the TSHD plume and subsequent BHD plume have fully coalesced,
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:with two peaks in concentration; the original TSHD plume has a peak now around 100mg/l locally at its
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:centre whilst the more recently formed (but smaller) BHD plume has a peak SSC value at its centre of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:previous TSHD release, the now fully coalesced plume has a peak SSC of around 100mg/l very locally and
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:plume remains present a further 45 minutes later, the original coalesced plume is considerably smaller in
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:successive disposal events, any coalescence of subsequent plumes would continue to result in only
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:70:coalescence of successive plumes at significant concentrations or for long durations is very low even during
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:71:Figure 6.61 Plume of enhanced SSCs arising from disposal activities during Stage 2 of the capital
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:72:the offshore disposal commences (Plot B) a plume starts to be generated at the point of release. The
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:72:plume starts to increase in spatial extent shortly after cessation of discharge due to advection by tidal
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:72:The plumes associated with Stage 3 disposal activities are generally lower in concentration than those for
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:72:Indeed, the plume arising from Stage 3 disposal activities fully disperses before the next subsequent
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:72:in this offshore area). Due to this, there is no possibility of plumes coalescing from Stage 3 disposal
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:73:Figure 6.4 Plume of enhanced SSCs arising from disposal activities during Stage 3 of the capital
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:Like during Stage 2, there is potential for the plume from a TSHD discharge to coalesce with a preceding or
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:Plot A shows the residual plume from a TSHD disposal some 5 minutes before the commencement of a
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:separate plumes at 45 minutes after cessation of the BHD discharge. A further 30 minutes later, another
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:TSHD release occurs within the previous BHD plume extent (Plot E). Peak concentrations from the TSHD
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:plume has widely dispersed, a further BHD release is made some 50 minutes later, again within the previous
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:(now coalesced) plumes. Despite this coalesced plume now containing elements of three separate
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:the residual plume shown in Plot A coalesce with the ‘three-release’ plume (Plot G), although the SSC
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:values at the point of overlap are very low (~10mg/l). Around 55 minutes later, the plume is now mostly
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:74:disposal site, leading to coalescence of subsequent plumes, the resulting temporary, short duration effects
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:75:Figure 6.5 Plume of enhanced SSCs arising from disposal activities during Stage 4 of the capital
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:76:for coalescence of subsequent plumes is greatest. In reality, subsequent disposals will be at different parts
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:76:At the extremities of the plume extent, there are wide zones of relatively low SSC values (<100mg/l).
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:76:sediment plume associated with one release event (this example being from Stage 1). It can be seen that
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:76:is negligible, whilst to the north it covers a similar zone to the sediment plume for this disposal event, which
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:80:the northern and southern boundaries (Figure 6.68). This correlates to the areas where a plume will extend
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:The river dredging and offshore disposal activities will both cause plumes of sediment to form close to the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:release point of material into the water column. These plumes will disperse under wave and current action
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:Once a plume is generated, the highest SSC values will be recorded at the point of river dredging or offshore
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:advected away from the point of release by the prevailing currents. At the peripheries of each plume, the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:working in parallel, there could be instances where two separately formed plumes coalesce to form one
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:81:(spatially) larger plume. However, the same principles of dispersion by prevailing currents applies, with
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:The plume effects arising from the river dredging are characterised by a short-lived localised increase in
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:plume effects will be observed throughout much of the approximately four-month period, but at varying
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:extents during the four different stages. During Stages 1-3 the dredging-related plume effects will be largely
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:Dock and Tees Dock. During Stage 4 the dredging-related plume effects will be largely confined to the
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:very minor magnitudes, in areas covering the same spatial extent as the sediment plumes. Where this
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:The plume effects arising from the offshore disposal similarly show peak concentrations at the point of
R-2020-0684-ESM-PC1084_RHD-ZZ-XX-RP-Z-1100_6. Hydrodynamic and sedimentary regime.pdf:82:are typically a few thousand mg/l at the point of disposal activity. Plumes become advected by tidal currents
R-2022-0755-CD-10035117-AUK-XX-XX-RP-ZZ-0428-04-LWoW_DQRA.pdf:986:Plume thickness 11.55 Assumed to be equal to the saturated aquifer thickness
R-2022-0755-CD-10035117-AUK-XX-XX-RP-ZZ-0428-04-LWoW_DQRA.pdf:994: Initial contaminant concentration in groundwater at plume core C0 1.00E+00 mg/l 0 10 20 30 40 50 60 15.0 2.41E-01
R-2022-0755-CD-10035117-AUK-XX-XX-RP-ZZ-0428-04-LWoW_DQRA.pdf:994: Width of plume in aquifer at source (perpendicular to flow) Sz 6.50E+02 m 22.5 1.18E-01
R-2022-0755-CD-10035117-AUK-XX-XX-RP-ZZ-0428-04-LWoW_DQRA.pdf:994: Plume thickness at source Sy 1.16E+01 m Dispersivity based on Xu0& EcksteinNote graph assumes plume disperses vertically in one direction only. An alternative
R-2022-0755-CD-10035117-AUK-XX-XX-RP-ZZ-0428-04-LWoW_DQRA.pdf:994: 1 0.1% of pathway length the centre of the plume is located at the mid-depth of the aquifer is 27.5 7.34E-02
R-2022-0755-CD-10035117-AUK-XX-XX-RP-ZZ-0428-04-LWoW_DQRA.pdf:995: Initial contaminant concentration in groundwater at plume core C0 1.00E+00 mg/l 00 1050 20 100 30 150 40 200 50 250
R-2022-0755-CD-10035117-AUK-XX-XX-RP-ZZ-0428-04-LWoW_DQRA.pdf:995: Width of plume in aquifer at source (perpendicular to flow) Sz 6.50E+02 m 90.0 3.66E-03
R-2022-0755-CD-10035117-AUK-XX-XX-RP-ZZ-0428-04-LWoW_DQRA.pdf:995: Plume thickness at source Sy 1.16E+01 m Dispersivity based on Xu 0
R-2022-0755-CD-10035117-AUK-XX-XX-RP-ZZ-0428-04-LWoW_DQRA.pdf:995: (1995)graph assumes plume disperses vertically in one direction only. An alternative 100.0 1.96E-03
R-2022-0755-CD-10035117-AUK-XX-XX-RP-ZZ-0428-04-LWoW_DQRA.pdf:995: Dispersivities 10%, 1%,10.1% of pathway length the centre of the plume is located at the mid-depth of the aquifer is 110.0 1.05E-03
R-2020-0411-FFM-Appendix 8.3 WFD.pdf:27: Note that a footprint may also be a temperature or sediment plume. For dredging activity, a footprint is 1.5 times the dredge area.
R-2020-0411-FFM-Chapter 5 Planning Policy.pdf:12:5.2.71 Paragraph 5.9.2 notes that cooling towers, exhaust stacks and the associated steam plumes have
R-2020-0411-FFM-Chapter 11 Air Quality.pdf:9: dispersion of the plume.
R-2020-0411-FFM-Chapter 11 Air Quality.pdf:11: and also allows for the effect of plume rise, complex terrain, buildings and deposition. Dispersion
R-2020-0411-FFM-Chapter 11 Air Quality.pdf:11: • Wind direction determines the sector of the compass into which the plume of stack exhaust
R-2020-0411-FFM-Chapter 11 Air Quality.pdf:12: • Wind speed affects the distance that the plume travels over time and can affect plume
R-2020-0411-FFM-Chapter 11 Air Quality.pdf:12: dispersion by increasing the initial dilution of pollutants and inhibiting plume rise; and
R-2020-0411-FFM-Chapter 11 Air Quality.pdf:12: motion. It therefore, affects the spread of the plume as it travels away from the source. New
R-2020-0411-FFM-Chapter 11 Air Quality.pdf:12:11.2.54 The roughness of the terrain over which a plume passes can have a significant influence on
R-2020-0411-FFM-Chapter 11 Air Quality.pdf:14: buildings to avoid wake effects bringing the undiluted plume down to the ground.
R-2020-0411-FFM-Chapter 11 Air Quality.pdf:32: Environment Agency (2007) Review of methods for NO to NO2 conversion in plumes at short
R-2020-0411-FFM-Chapter 2 Project Description.pdf:13:2.4.57 The air quality and plume dispersion modelling used to identify the stack height necessary for
R-2020-0411-FFM-Appendix 11.2 - Detailed Baseline Assessment.pdf:6: μg.m-3 at rural sites exposed to coal-fired power station plumes.
R-2020-0411-FFM-11366_REC Planning Statement_S_AS.pdf:23:3.1.57 The air quality and plume dispersion modelling used to identify the stack height necessary for
R-2020-0411-FFM-11366_REC Planning Statement_S_AS.pdf:48:4.4.67 Paragraph 5.9.2 notes that cooling towers, exhaust stacks and the associated steam plumes have
R-2020-0411-FFM-11366_REC Planning Statement_S_AS.pdf:48: cooling towers and minimal water vapour plumes. Moreover, the stack height has been optimised
R-2023-0179-SCP-HyGreen Production Facility Scoping Report_FINAL.pdf:65: contamination hotspots or plumes, quantitative risk assessment, remediation and
R-2020-0819-ESM-Dorman Point - Planning Statement - Dec 2020.pdf:45: development are dust deposition, resulting in the soiling of surfaces; visible dust plumes;
R-2020-0819-ESM-Dorman Point ES - Vol 2 - Chapter F - Air Quality - Dec 2020.PDF:10: development are dust deposition, resulting in the soiling of surfaces; visible dust plumes;
R-2020-0819-ESM-Dorman Point ES - Vol 2 - Chapter L - LVIA - Dec 2020.PDF:28: station and chimney stack, with plumes of steam emerging into the skyline. Nearby Errington
R-2020-0822-ESM-Long Acres ES - Vol 2 - Chapter L - LVIA - Dec 2020.PDF:28: station and chimney stack, with plumes of steam emerging into the skyline. Nearby Errington
R-2020-0822-ESM-Long Acres ES - Vol 2 - Chapter F - Air Quality - Dec 2020.PDF:10: development are dust deposition, resulting in the soiling of surfaces; visible dust plumes;
R-2023-0227-CD-TV_ERF_Air_Quality_Emissions_Modelling_Report.pdf:26: increased turbulence can cause greater plume mixing.
R-2023-0227-CD-TV_ERF_Air_Quality_Emissions_Modelling_Report.pdf:26: • The rise and trajectory of the plume may be depressed slightly by the flow distortion. This
R-2023-0227-CD-TV_ERF_Air_Quality_Emissions_Modelling_Report.pdf:34: the quantity of pollutants emitted but also to reduce the buoyancy of the plume due to momentum.