Contents

9 WATER QUALITY

Appendices

Appendix 9A1       Construction Sequence and Construction Programme – HKBCF (Sequence A)

Appendix 9A2       Construction Sequence and Construction Programme – HKBCF (Sequence B)

Appendix 9B         Comparison of Sediment Loss Rate of Sequence A and Sequence B

Appendix 9C         Construction Sequence and Construction Programme – HKLR Reclamation

Appendix 9D1       Sediment Testing Results for TM-CLKL

Appendix 9D2       Summary of Proposed Simulations for Water Quality Modelling for the HKBCF, HKLR and TM-CLKL      

Appendix 9D3       Calculation of Loss Coefficients for Bridge Piers

Appendix 9D4       Pollution Loading Inventory

Appendix 9D5       Cumulative Dredging and Sediment Loss Rates

Appendix 9D6       Water Quality Mitigation – Silt Curtain Application

Appendix 9D7       2026 Quality Modelling Results

Appendix 9D8     2011 Construction Plumes Modelling Results

Appendix 9D9    2012 Construction Plumes Modelling Results

Appendix 9D10    2013 Construction Plumes Modelling Results

Appendix 9D11   Mitigated Scenario for (2+1) Silt Curtain System

Appendix 9D12  Sensitivity Test for TSHD High Overflow Scenario in PRD

Appendix 9E1      Modelling Verification Plots - Grid Refinement

Appendix 9E2      Modelling Verification Plots - Baseline  

Appendix 9E3   Modelling Verification Plots - Sequence B

Appendix 9F      Modelling Results for HKBCF Sequence B

Figures

Figure 9.1            Location Plan for HKBCF, TMCLKL and HKLR

Figure 9.2a          Envisaged Programmed of Reclamation and Sediment Loss Rates of HKBCF(Sequence A)+HKLR+TMCLKL

Figure 9.2b          Envisaged Programmed of Reclamation and Sediment Loss Rates of HKBCF(Sequence B)+HKLR+TMCLKL

Figure 9.3            Management Frameworks for Dredged/Excavated Sediment

Figure 9.4            Key Areas of Seabed Disturbance

Figure 9.5 Location of Water Quality and Ecological Sensitive Receivers

Figure 9.6            Monitoring Stations used for the Management of Contaminated Mud Pits at East of Sha Chau (2000-2005)

Figure 9.7            Sediment Sampling Locations for TMCLKL, HZMB and others (Indicative)

Figure 9.8            Coverage of Western Harbour Model

Figure 9.9 Comparison of Original and Refined Model Grids

Figure 9.10          Assumed Ultimate Coastline when HKBCF+HKLR+TMCLKL is completed (2026)

Figure 9.11          Main Flow Channel in Western Harbour

Figure 9.12 Indicative Location of Box Culverts for Discharges of Storm Waters from TMCLKL

Figure 9.13 Indicative Location of Box Culverts for Discharges of Storm Waters and Treated Effluent (HKBCF+HKLR)

Figure 9.14          Location Plan for the Proposed Pits to Receive Mf sediment in HKBCF

Figure 9.15          Proposed Details and Mitigation measures for the Pits to Receive Mf sediment in HKBCF

Figure 9.16          Location Plan for the Proposed Pits to Receive Mf sediment in HKLR

Figure 9.17          Proposed Details and Mitigation measures for the Pits to Receive Mf sediment in HKLR

Figure 9.18          2011 Dry Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Unmitigated Scenario)

Figure 9.19          2011 Dry Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Mitigated Scenario)

Figure 9.20          2011 Wet Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Unmitigated Scenario)

Figure 9.21          2011 Wet Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Mitigated Scenario)

Figure 9.22          2012 Dry Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Unmitigated Scenario)

Figure 9.23          2012 Dry Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Mitigated Scenario)

Figure 9.24          2012 Wet Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Unmitigated Scenario)

Figure 9.25          2012 Wet Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Mitigated Scenario)

Figure 9.26          2013 Dry Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Unmitigated Scenario)

Figure 9.27          2013 Dry Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Mitigated Scenario)

Figure 9.28          2013 Wet Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Unmitigated Scenario)

Figure 9.29          2013 Wet Season Predicted Maximum Sediment Plumes and Dolphin Density in North Lantau Waters (Mitigated Scenario)