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River Water Quality in Hong Kong in 2002 Results for 2002 from the River Water Quality Monitoring Programme of the Environmental Protection Department Monitoring Section Water Policy and Planning Group Environmental Protection Department The Government of the Hong Kong Special Administrative Region 2003 河 River Water Quality in Hong Kong in 2002 River Water Quality in Hong Kong in 2002 Report number : EPD/TR5/03 Date : November 2003 Report written by : Cecilia P.W. WONG Work done by : Cecilia P.W. WONG, S.W. LEE Y.W. LAU, W.H. WONG and C.K. TANG Work supervised by : Cathie S.W. KUEH Cover designed by : Y.W. LAU Security classification : Unrestricted Note: The information contained in this publication can be used freely for study, research and training purposes subject to acknowledgement of the source. Use of the information for purposes other than those stated above requires prior permission of the Director of Environmental Protection. 河 River Water Quality in Hong Kong in 2002 CONTENTS ACKNOWLEDGEMENTS K – 1 DISCLAIMER K – 2 SUMMARY OF RIVER WATER QUALITY IN 2002 S – 1 1. INTRODUCTION 1 – 1 2. TOLO HARBOUR AND CHANNEL WATER CONTROL ZONE 2 – 1 2.1 Shing Mun River 2 – 1 2.2 Lam Tsuen River 2 – 3 2.3 Tai Po River 2 – 3 2.4 Tai Po Kau Stream 2 – 4 2.5 Shan Liu and Tung Tze Streams 2 – 5 2.6 Tolo Harbour Sewerage Master Plan 2 – 6 3. SOUTHERN WATER CONTROL ZONE 3 – 1 3.1 Mui Wo River 3 – 1 4. PORT SHELTER WATER CONTROL ZONE 4 – 1 4.1 Ho Chung River 4 – 1 4.2 Sha Kok Mei Stream 4 – 1 4.3 Tai Chung Hau Stream 4 – 2 4.4 Port Shelter Sewerage Master Plan 4 – 3 5. JUNK BAY WATER CONTROL ZONE 5 – 1 5.1 Tseng Lan Shue Stream 5 – 1 河 River Water Quality in Hong Kong in 2002 C - 1 CONTENTS 6. DEEP BAY WATER CONTROL ZONE 6 – 1 6.1 River Indus 6 – 1 6.2 River Beas 6 – 2 6.3 River Ganges 6 – 2 6.4 Yuen Long Creek 6 – 3 6.5 Kam Tin River 6 – 4 6.6 Tin Shui Wai Nullah 6 – 5 6.7 Fairview Park Nullah 6 – 6 6.8 Ngau Hom Sha, Sheung Pak Nai, Pak Nai, Ha Pak Nai, 6 – 7 Tai Shui Hang and Tsang Kok Streams 6.9 Pollution control measures in the Deep Bay catchment 6 – 8 7. NORTH WESTERN WATER CONTROL ZONE 7 – 1 7.1 Tuen Mun River 7 – 1 7.2 Tung Chung River 7 – 2 8. WESTERN BUFFER WATER CONTROL ZONE 8 – 1 8.1 Pai Min Kok (Anglers’) Stream 8 – 1 9. VICTORIA HARBOUR WATER CONTROL ZONE 9 – 1 9.1 Sam Dip Tam Stream 9 – 1 9.2 Kau Wa Keng Stream 9 – 1 9.3 Kai Tak Nullah 9 – 2 河 River Water Quality in Hong Kong in 2002 C - 2 LIST OF FIGURES Figure Title Page I Percentages of river monitoring stations in Hong Kong showing S – 3 long-term water quality trends in different parameters II Compliance of Water Quality Objectives (WQOs) in the inland waters S – 4 of Hong Kong from 1986 to 2002 III Compliance of Hong Kong’s rivers and streams with Water Quality S – 5 Objectives (WQOs) in 2002 IV Major inland waters in Hong Kong and the Water Quality Index (WQI) S – 6 gradings of 82 monitoring stations in 2000 to 2002 V Water Quality Index (WQI) of inland waters of Hong Kong from 1986 S – 7 to 2002 VI Water Control Zones (WCZs) in Hong Kong S – 8 VII Livestock waste prohibition, control and restriction areas in Hong Kong S – 9 VIII Sewerage Master Plan areas in Hong Kong S – 10 2.1 Water Quality Index (WQI) of Shing Mun River and its tributaries 2 –14 2.2 Water Quality Index (WQI) of Shing Mun River and its tributaries 2 – 15 (continued) 2.3 Water Quality Index (WQI) of Lam Tsuen River and its tributaries 2 – 16 2.4 Water Quality Index (WQI) of Lam Tsuen River (continued) and Tai Po 2 – 17 River and their tributaries 河 River Water Quality in Hong Kong in 2002 C - 3 LIST OF FIGURES Figure Title Page 2.5 Water Quality Index (WQI) of minor streams in the Tolo Harbour and 2 – 18 Channel Water Control Zone 3.1 Water Quality Index (WQI) of Mui Wo River and its tributaries 3 – 5 4.1 Water Quality Index (WQI) of Ho Chung River and its tributaries 4 – 7 4.2 Water Quality Index (WQI) of Sha Kok Mei Stream and its tributaries 4 – 8 4.3 Water Quality Index (WQI) of Tai Chung Hau Stream and its tributaries 4 – 9 5.1 Water Quality Index (WQI) of Tseng Lan Shue Stream and its 5 – 5 tributaries 6.1 Water Quality Index (WQI) of the River Indus and its tributaries 6 – 20 6.2 Water Quality Index (WQI) of the River Beas and its tributaries 6 – 21 6.3 Water Quality Index (WQI) of the River Ganges and its tributaries 6 – 22 6.4 Water Quality Index (WQI) of Yuen Long Creek and Kam Tin River 6 – 23 and their tributaries 6.5 Water Quality Index (WQI) of Tin Shui Wai Nullah and Fairview Park 6 – 24 Nullah and their tributaries 6.6 Water Quality Index (WQI) of minor streams in the Deep Bay Water 6 – 25 Control Zone 6.7 Water Quality Index (WQI) of minor streams in the Deep Bay Water 6 – 26 Control Zone (continued) 河 River Water Quality in Hong Kong in 2002 C - 4 LIST OF FIGURES Figure Title Page 7.1 Water Quality Index (WQI) of Tuen Mun River and its tributaries 7 – 6 7.2 Water Quality Index (WQI) of Tung Chung River and its tributaries 7 – 7 8.1 Water Quality Index (WQI) of Pai Min Kok (Anglers’) Stream and its 8 – 5 tributaries 9.1 Water Quality Index (WQI) of Sam Dip Tam Stream and its tributaries 9 – 9 9.2 Water Quality Index (WQI) of Kau Wa Keng Stream 9 – 10 9.3 Water Quality Index (WQI) of Kai Tak Nullah 9 – 11 河 River Water Quality in Hong Kong in 2002 C - 5 LIST OF TABLES Table Title Page I Summary of river water quality monitoring stations and sampling 1 – 2 frequencies in 2002 IIA – C Summary of the parameters and analytical methods in the river water 1 – 3 quality monitoring programme IIIA – B Summary of key Water Quality Objectives (WQOs) for different 1 – 6 watercourses in the river monitoring programme IV Water Quality Index (WQI) for inland waters of Hong Kong 1 – 8 2.1A – C River water quality trends in the Tolo Harbour and Channel Water 2 – 7 Control Zone based on the results of the Seasonal Kendall Test 2.2 Pollution load reductions in the river catchments of the Tolo Harbour 2 – 10 and Channel Water Control Zone as at the end of 2002 2.3A Summary of water quality monitoring data for Shing Mun River in 2 – 11 2002 2.3B Summary of water quality monitoring data for Shing Mun River, Tai 2 – 12 Po River and minor streams in the Tolo Harbour & Channel Water Control Zone in 2002 2.3C Summary of water quality monitoring data for Lam Tsuen River in 2 – 13 2002 3.1 River water quality trends in the Southern Water Control Zone based 3 – 2 on the results of the Seasonal Kendall Test 河 River Water Quality in Hong Kong in 2002 C - 6 LIST OF TABLES Table Title Page 3.2 Pollution load reduction in the Mui Wo River catchment of the 3 – 3 Southern Water Control Zone as at the end of 2002 3.3 Summary of water quality monitoring data for Mui Wo River in 2002 3 – 4 4.1 River water quality trends in the Port Shelter Water Control Zone 4 – 4 based on the results of the Seasonal Kendall Test 4.2 Pollution load reductions in the river catchments of the Port Shelter 4 – 5 Water Control Zone as at the end of 2002 4.3 Summary of water quality monitoring data for Ho Chung River, Sha 4 – 6 Kok Mei Stream and Tai Chung Hau Stream in 2002 5.1 River water quality trends in the Junk Bay Water Control Zone based 5 – 2 on the results of the Seasonal Kendall Test 5.2 Pollution load reduction in the Tseng Lan Shue Stream catchment of 5 – 3 the Junk Bay Water Control Zone as at the end of 2002 5.3 Summary of water quality monitoring data for Tseng Lan Shue 5 – 4 Stream in 2002 6.1A – C River water quality trends in the Deep Bay Water Control Zone based 6 – 10 on the results of the Seasonal Kendall Test 6.2A – D Pollution load reductions in the river catchments of the Deep Bay 6 – 13 Water Control Zone as at the end of 2002 6.3A Summary of water quality monitoring data for the River Indus, the 6 – 17 River Beas and the River Ganges in 2002 河 River Water Quality in Hong Kong in 2002 C - 7 LIST OF TABLES Table Title Page 6.3B Summary of water quality monitoring data for Yuen Long Creek, 6 – 18 Kam Tin River and Tin Shui Wai Nullah in 2002 6.3C Summary of water quality monitoring data for Fairview Park Nullah 6 – 19 and minor streams in the Deep Bay Water Control Zone in 2002 7.1 River water quality trends in the North Western Water Control Zone 7 – 3 based on the results of the Seasonal Kendall Test 7.2 Pollution load reduction in the Tuen Mun River catchment of the 7 – 4 North Western Water Control Zone as at the end of 2002 7.3 Summary of water quality monitoring data for Tuen Mun River and 7 – 5 Tung Chung River in 2002 8.1 River water quality trends in the Western Buffer Water Control Zone 8 – 2 based on the results of the Seasonal Kendall Test 8.2 Pollution load reduction in the Pai Min Kok (Anglers’) Stream 8 – 3 catchment of the Western Buffer Water Control Zone as at the end of 2002 8.3 Summary of water quality monitoring data for Pai Min Kok 8 – 4 (Anglers’) Stream in 2002 9.1A - B River water quality trends in the Victoria Harbour Water Control 9 – 4 Zone based on the results of the Seasonal Kendall Test 9.2 Pollution load reductions in the river catchments of the Victoria 9 – 6 Harbour Water Control Zone as at the end of 2002 河 River Water Quality in Hong Kong in 2002 C - 8 LIST OF TABLES Table Title Page 9.3A Summary of water quality monitoring data for Sam Dip Tam Stream 9 – 7 and Kau Wa Keng Stream in 2002 9.3B Summary of water quality monitoring data for Kai Tak Nullah in 9 – 8 2002 河 River Water Quality in Hong Kong in 2002 C - 9 ACKNOWLEDGEMENTS We acknowledge the following parties for their contributions to the river water quality report: Government Laboratory and Waste Policy and Services Group, Environmental Protection Department for undertaking chemical and bacteriological analyses of river samples.
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