Wuhan Wastewater and Stormwater Management Project
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Environmental Assessment Report Summary Environmental Impact Assessment Project Number: 37597 January 2006 People’s Republic of China: Wuhan Wastewater and Stormwater Management Project Prepared by Wuhan Municipal Government for the Asian Development Bank (ADB). The summary environmental impact assessment is a document of the borrower. The views expressed herein do not necessarily represent those of ADB’s Board of Directors, Management, or staff, and may be preliminary in nature. CURRENCY EQUIVALENTS (as of 1 February 2006) Currency Unit – yuan (CNY) CNY1.00 = $0.12 $1.00 = CNY8.06 The exchange rate of the yuan is determined under a floating exchange rate system. In this report a rate of $1.00 = CNY8.06 is used. ABBREVIATIONS ADB – Asian Development Bank BOD – biochemical oxygen demand COD – chemical oxygen demand CSC – construction supervision company EIA – environmental impact assessment EIRR – economic internal rate of return EMC – environmental management consultant HEPB – Hubei Provincial Environmental Protection Bureau H2S – hydrogen sulfide NH3 – ammonia NH3-N – ammonia nitrogen NO2 – nitrogen dioxide O&M – operation and maintenance PDMF – project design and monitoring framework pH – factor of acidity PMO – project management office PPTA – project preparatory technical assistance PRC – People’s Republic of China SEIA – summary environmental impact assessment SEPA – State Environmental Protection Administration SS – suspended solids TN – total nitrogen TP – total phosphorus TSP – total suspended particles uPVC – unplasticised polyvinyl chloride WDC – Wuhan Drainage Company WEPB – Wuhan Municipal Environmental Protection Bureau WMG – Wuhan municipal government WUCF – Wuhan Urban Construction Foundation WWTP – wastewater treatment plant WWMP – Wuhan Wastewater Management Project WEIGHTS AND MEASURES dB – decibel ha – hectare m3 – cubic meter m3/s – cubic meter per second mg/L – milligram per liter km – kilometer 2 km – square kilometer m2 – square meter mm – millimeter m/s – meter per second m3/d – cubic meter per day t/y – ton per year NOTE In this report, "$" refers to US dollars. CONTENTS Page MAPS I. INTRODUCTION 1 II. DESCRIPTION OF THE PROJECT 3 A. Wastewater Component 4 B. Stormwater Component 5 III. DESCRIPTION OF THE ENVIRONMENT 5 A. General Project Setting and Physical Environment 5 B. River System and Hydrology 6 C. Water Quality 6 D. Ecological Environment 8 E. Social and Economic Conditions 9 IV. ALTERNATIVES 10 A. With or Without the Project 10 B. Alternatives for Wastewater Collection 10 C. Alternatives Sites for Wastewater Treatment 10 D. Alternatives for Industrial Wastewater Treatment 11 E. Alternatives for Effluent Reuse 11 F. Alternatives for Sludge Disposal 11 G. Alternatives for Stormwater Management 11 V. ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION MEASURES 12 A. Positive Impacts and Environmental Benefits 12 B. Mitigation Measures during Design Phase 13 C. Environmental Impacts and Mitigation Measures during the Construction Phase13 D. Environmental Impacts and Mitigation Measures during the Operation Phase 14 E. Land Acquisition and Resettlement 16 VI. ECONOMIC ASSESSMENT 17 VII. ENVIRONMENTAL MANAGEMENT PLAN 17 A. Environmental Management 17 B. Environmental Monitoring 18 C. Institutional Enhancement 19 VIII. PUBLIC INVOLVEMENT AND INFORMATION DISCLOSURE 19 A. Institutional Enhancement 19 B. Future Plans for Public Involvement 21 C. Information Disclosure 21 IX. CONCLUSION 21 A. Project Risks 21 B. Benefits 22 C. Potential Negative Impacts and Associated Mitigation Measures 22 APPENDIXES 1. References 2. Wuhan Wastewater and Stormwater Management Project – Environmental Management Plan Map 1 o 110 o 00'E 120 00'E Heilongjiang 113 o E Jilin Inner Mongolia o 40 00'N WUHAN WASTEWATER Liaoning o BEIJING 40 00'N AND STORMWATER Tianjin MANAGEMENT PROJECT Hebei Ningxia Shaanxi Shandong IN THE Qinghai Shanxi Yellow PEOPLE'S REPUBLIC OF CHINA Gansu Sea Henan Jiangsu o 30 00'N Anhui Shanghai Hubei Wuhan o Sichuan Zhejiang 30 00'N Chongqing o 110 o 00'E 120 00'E 115 o E H E N A N 32 o N 32 o N H a n S u i R i v e r A N H U I H U B E I Ching -shan Hanyang H WUHAN a g n n Su a i River i j g n a h C C h a n g o j 30 N o ia n 30 N g National Capital Provincial Capital N H U N A N City/Town Railway J I A N G X I River 0 20 40 60 80 Provincial Boundary International Boundary Kilometers Boundaries are not necessarily authoritative. o 113 o E 115 E 06-0128b RM Proposed Wastewater Treatment Plant Lake WUHAN WASTEWATER AND STORMWATER MANAGEMENT PROJECT River LOCATION OF WASTEWATER SUBPROJECTS Service Area of Proposed Wastewater Subproject IN THE Service Area of Other Wastewater Treatment Plant Landfill Site (LS) PEOPLE'S REPUBLIC OF CHINA Huangpu Road Wastewater Subproject 3 Incineration Plant (IP) WWTP Capacity: 100,000 m /d (upgrade) Population Served (2015) : 311,000 Service Area : 7.48 km2 Dongxihu Wastewater Subproject Collection System : pipeline 15.55 km box culvert 9.8 km Pumping Stations : five (5) Population Served (2015) : 215,000 Service Area : 55.2 km2 Caindian Wastewater Subproject WWTP Capacity: 50,000 m3/d (new) Collection System : 4.59 km Pumping Stations : one (1) Population Served (2015) : 165,000 Service Area : 23.8 km2 Nantaizi Lake Wastewater Subproject WWTP Capacity: 10,000 m3/d (expansion) Erlangmiao Wastewater Subproject Collection System : 7,435 km WWTP Capacity: 180,000 m3/d (upgraded) Pumping Stations : three (3) 60,000 m3/d (expansion) Population Served (2015) : 610,900 2 Population Served (2020) : 723,800 Service Area : 67 km Service Area : 32.2 km2 0 5 M - 6 5 a 1 4 p b H 2 R WUHAN WASTEWATER AND STORMWATER MANAGEMENT PROJECT LOCATION OF STORMWATER SUBPROJECTS IN THE PEOPLE'S REPUBLIC OF CHINA Changqing Stormwater Subroject 1 Existing Pumping Station: Q=52 m3/s 2 Expanded Pumping Station: Q=135 m3/s Service Area: 54.5 km2 Population Served (2010): 1,160,000 Changqing Stormwater Subproject 3 Expanded Xindun Gate: Q=85 m3/s 4 Expanded Jinkou Gate: Q=45 m3/s 5 New Huangjiadawan Gate: Q=30 m3/s Box Culvert: 3.915 km Open Channel Renovation: 4.48 km New Open Channel: 4.34 km Service Area: 54.5 km2 Population Served (2010): 756,000 Yangsigang Stormwater Subproject Luojia Road Stormwater Subproject 6 New PS: Q=20 m3/s 7 Existing PS: Q=30 m3/s Box Culvert: 1.9 km 8 Expanded PS: Q=55 m3/s Pipeline: 1.34 km Open Channel: 8.81 km Service Area: 3.67 km2 Box Culvert: 0.39 km Population Served (2010): 53,4000 Service Area: 22.57 km2 Population Served (2010): 646,0000 Existing Storm Sewer Proposed Storm Sewer Existing Pumping Station Proposed Pumping Station Existing Storm Gate Proposed Storm Gate Lake River Service Area of Proposed Storm Water Subproject Drainage Subcathment Boundary 0 5 M - 6 5 a 1 4 p d H 3 R I. INTRODUCTION 1. Rapid economic growth and urbanization are placing pressure on the People's Republic of China's (PRC) overloaded urban infrastructure, causing a rapid spike in demand for urban services and an increase in pollution-related environmental threats. The growing need for basic urban services is straining the physical and financial capacity of most cities to provide adequate wastewater and stormwater infrastructure. This has led to (i) a deterioration of the quality of life for urban residents, (ii) degradation of the urban environment, and (iii) inefficient economic development. Currently, about 90% of industrial wastewater is treated before discharge to a municipal sewer. Municipal wastewater is a major contributor to pollution of the PRC’s rivers and lakes, with the most severe pollution impacts in the water-short norther region. Currently, only about 40% (34% in 1999) of urban wastewater is treated; the rest is discharged untreated to rivers and lakes. In most PRC cities, untreated industrial wastewater is the main source of water pollution. This could increase the incidence of waterborne diseases and cause other public health problems. Because of the seriousness of the situation, the Government is paying increasing attention to water resources management, wastewater treatment and pollution control, stormwater management, and the formulation of associated investment plans. Government policies require that urban environmental pollution and ecological damage be controlled by 2010, and recent state guidelines require that major cities, such as provincial capitals, have wastewater treatment rates of at least 80% by 2010.1 The proposed Wuhan wastewater and stormwater management project, to be partially funded by a loan from the Asian Development Bank (ADB) will addres the respective needs in urban and suburban areas of the city of Wuhan. The project processing is expected for completion by mid 2006. 2. Wuhan is a major city located along the middle portion of Yangtze River in the eastern part of Hebei province. Water quality in the Wuhan section of the Yangtze River (also referred to as the Changjiang River) has decreased over the last 15 years, mainly as a result of wastewater discharge from the city. In 2004, about 2.0 million cubic meters per day (m3/d) of wastewater was generated, but the four wastewater treatment plants (WWTPs) lacked capacity to treat more than 27% of this quantity. To achieve sustainable wastewater management and water resource protection, the Asian Development Bank (ADB) approved the Wuhan Wastewater Management Project (WWMP) in 2003. The investments being made under the ongoing WWMP together with the World Bank2 and bilateral assisted wastewater treatment projects will help increase this percentage to 70% by 2008. With the proposed Project, the wastewater treatment rate will reach the required 80% by 2010. 3 The municipal government is undertaking a comprehensive wastewater management program through 2010. The proposed Project complements the ongoing WWMP, the World Bank Urban Improvement Project, and wastewater treatment facilities constructed with bilateral assistance from Poland and Finland.