China - Third Inland Waterways Project : environment impact assessment (Vol. 2 of 3) : Xiangjiang Waterway Construction and Development : Zhuzhou navigation complex - environmental impact assessment (revised)

E426 Volume 2 (revised) Data (3) Submitted to the World Bank World Bank Loan Project: China Inland Waterway Ill Xiangjiang Waterway Construction & Development Zhuzhou Navigation Complex Project Environmental Impact Assessment Hunan Environmental Protection Research Institute Changsha, Hunan January 2001 F!'~~~~~r  Environmental Impact Assesment Organization Unit: Hunan Environmental Protection Research Institute Assessment Certificate: China Certificate No.: EECJZ 2702 HEPRI Director: Peng Xiang Cooperative Units: Hengyang Environmental Protection Research Institute Zhuzhoij Environmental Protecbon Research Instute Project Superintendent: Liu Jiawven Members: Liu Jiawen (Certificate No.: EEUC-Changsha 05767) Xiong Rkuyi (ADB Certificate No.: EETC 95280) Hu Yuriquan (Certificate No.: EEUC-Changsha05790) Liao V\enhui (Certificate No.: EEUC-Charxsha 05714) Xiao Ji ingjie (Cerlificate No.: EEUC-Changsha 05897) Zhang Yuqing (ADB Cerfficate No.: EETC 95279) Liu Dingzhong (Cerificabe No.: EEUC-Changsha 05765) Checked by: Yao Bini -1-  Environmental Impact Assessment Content 1. General ...........................................................................---- 5 1.1 Motivation-...................................... ..---- 5 1 .2 Assessment Objective. .---------------..------------------ 6 1.3 Assessment Basis .-------------------------------- ..X-- ..-......-------.-- 6 1.4 Assessment Areas-........... .............................---.--.-..-..---.--.--.-.-..-.. 7 1.5 Assessment Standards. .-...---..-.. --------.. -------------..-------------------8 1.6 Objective of Environmental Protection. .--.-.-.---.-------.-..---.---.---11 1.7 Assessment Assignments-.-------------------------..--------.*----------------------12 2. Outline of Project -----.....--..---.*--------------..---.---.------------.*-----------------13 2.1 Overview. . ----------------..-..-----------------------------..--..----------- .-- 13 2.2 Auxiliary Works. .--.. --.. ---.. -------------..----.------ - ...................... 18 3. Present Environmental Situation ..20 3.1 Natural Environment. .....................................................................20 3.2 Social Environment. .-------..-------..--------------------------.-.-----------------23 3.3 Regional Water Pollution Sources. . ----.. -----------.---.--------------.--26 3.4 Water Environment .--..---------------..------------------30 3.5 Ecological Environment .......................................... 35 3.6 Atmospheric & Acoustic Environment. .---------.----------------------38 4. Impacts on Water Environment---------------.----.. -- 39 4.1 Impacts on Water Environment during Construction Phase .---------- 39 4.2 Impact on Hydrologic Environment during Operation Phase ..................-40 4.3 Impact on Integral Water Quality in Reservoir Area during Operation Phase .................................................................................................-42 2  Environmental Impact Assessment 4.4 Impact on Water intake duringj Operation Phase ..- 46 5. Analysis of Ecological Impact ........................................................--.49 5.1 Impact on Vegetation. .------- -------- . 49 5.2 Impact on Water Organism .-....-..---------..--..---------50 5.3 Impact on Public Health .- -......-------------------------51 5.4 Impact on Soil Erosion. . ----------------------------------.----------------------52 6. Impact on Social, Acoustic & Atniospheric Environments .55 6.1 Impact on Social Environmert. . -..--------- ..--.-------.-55 6.1.1 Land Acquisition and Reseltlement ................................................ 55 6.1.2 Impact on Regional Econornic Development. . -.-.----.---.---------58 6.1.3 Impact on Regional Ecolcgical Landscape and Cultural Relic and Historic sites-................................................................................... 58 6.2 Impact on Atmosphere .*-- -.--------..-..-..-------------------------------------.-60 6.3 Impact on Acoustic Environment. .- 61 6.4 Impact on Geological Environment ..------------------------ 63 7. Alternatives Analysis. .---..---------..---..--..-..- ..--......---..-..-----.--- .--- .-- 66 7.1 Dam Sites Alternatives. . *------------------------------------------------.- 66 7.2 Normal Water-storage Level 3election .----------------------------------------- 68 7.3 Alternatives of Carrying out thie Project and Not Carrying out the Project- -70 8. Environmental Impact Analysis of Xiangjiang River Zhuziou-Xiangtan Waterway Dredging & Expansion Project. ............................................. .....-.... 73 8.1 Regional Environment-.............. 73 8.2 Waterway Dredging & Expansion Project. .-------------------------- 74 8.3 Survey and Assessment on WNater Environment for Xiatngjiang River Zhuzhou- Xiangtan Section -.-----------------................................. 74 8.4 Environmental Impact Analysis d1'Waterway Dredging & Expansion Project . 77 3  Environmental Impact Assessment 9. Environmental Impact Analysis ol Hengshan kilo-tonnage Dock Project . ------80 9. 1 General Project Information .--.. ---..-- ..---80 9.2 Survey of Regional Environment at Hengshan kilo-tonnage Dock Site . 81 9.3 Impacts Analysis of Hengshan Dock Construction .81 9.4 Public Opinion Survey on Herigshan kilo-tonnage Dock Project . ----.--.-.83 10. Public Consultation. . ---..-..--..- ..---..--......--..-----..--.. 84 10.1 First Public Consultation . .........................................................-84 10.2 Second Public Consultation-........................................................ 85 11. Environment Management Plan .------------------- ....-- ..-.-.--- .- 88 1 1.1 Environmental Protection MeasuIres for Zhuzhou Navigation Complex Project - * 88 11.2 Environmental Protection Measures for Hengsha Kiloton-cliss Dock Project 99 11.3 Environmental Protection Measures for Waterway Dredging Project between Zhuzhou and Xiangtan-.................................................................................................. 100 11.4 Institutional Arrangement for Environmental. . ------------.--.---.------ 102 11.5 Environmental Training. . ---.. ---.... -------------------.. ------------- 103 11.6 Environmental Monitoring ..................................................... 104 11.7 Investment Estimates of Environment Protection------------.................. 108 12. Conclusion and Suggestion -.... 110 12.1 Conclusion ----..-.---.... 110 12.2 Suggestion --.....------...---............................ *----110 Attachments: 1. Sketch Map of Xiangjiang Watelway Construction & Developrient. 2. General Layout of Zhuzhou Na%rigation Complex Project. 3. Distribution of Main Pollution Sc urces and Water Sampling Locations. 4. Schematic Diagram of Inundated Area for Zhuzhou Navigation Complex Project 5. General Layout for Kloton-cl3ss Waterway Dredging Project and Distribution of Monitoring Points for Water Quility and Bottom Sludge 6. Location Drawing for Hengshan Kiloton-class Dock Project 7. Material Quarry Locations 4  Environmental Impact Assessment 1. General 1.1 Motivation Xiangjiang River, originating fronm Haiyangshan Mountairn of Linchuan County, Guangxi Zhuang Autonomous Region, is the biggest river within Hunan Province and a first-grade branch of Yangtze River. It runs through Hunan Province from south to north and empties into Yangtze River at Chenglingji of Yueyang city, with a total length of 969 km and a drainage area of 94,660 km2. Hunan's major industrial cities such as Yueyang, Changsha, Xiangtan, 2:huzhou and Hengyang are all situated on its riverside. 70% of the large & medium-scale enterprises t:hereof are sited along Xiangjiang River, therefore, Xiangjiang River is regarded as the economic corridor of Hunan Province. In 1985, the Ministry of Communications (MOC), Development Center of the State Council and Hunan Provincial Govarnment jointly conducted an extensive survey on Xiangjiang River, aiming at upgrading the 439km waterway between Hengyang and Chenglingji into a Kilo-tonnage ravigation channel. In 1988, MOC submitted a proposal to State Planning Cominittee (SPC), suggesting that Xiangjiang River Waterway Construction be taken as an experimental project for inland waterway development. In 1989, MOC's cfficials instructed, duringj a site inspection on Xiangjiang River, that the auxiliary works should be expedited simultaneously while developing Xiangjiang River waterv/ay. In December of the same year, Yangtze River System Development-Strategy SEminar (YRSDSS) also suggested in its report submitted to the State Council ori Yangtze River Waterway System Development Proposals, that Xiangjing River waterway development project be taken as a model project for navigation & power joint constructions, water resources extensive exploitations and navigation modernization. With Central Government and HLnan Provincial Government's intensive concern, Xiangjiang River Waterway Construction Project is currently progressing smoothly. The Phase I Project of Xingjiang River - Zhuzhou to Chenglingji Grade Ill Waterway Dredging Project, which approved Dy SPC, was commenced in 1989 and completed in 1994. The follow-up Phase 11 Prcject was officially commenced in December 1995. After 5-year construction, the principal part - Dayuandu Navigiation & Power Complex Project will be completed and put irto operation in 2000. In 1999, Hunan Provincial Party Committee and Government set forward a strategic target aiming at accelerating the priority regional economy development, known as One Point and One Line, and speeding up the economic integration program of three cities, respectively known as Changsha, Zhuzhou and Xiangtan. Zhuzhou Navigation & Power Complex Project is now officially listed in the Government's agenda. MOC and Hunan Province have included Xiangjiang River Rolling Development Project - Zhuzhou Navigation & Power Complex Construction into national and provincial 5  Environmental Impact Assessment early-stage schedule of The Tenth Five-Year Plan. Hunan Provincial Communications Department (HPCD) entrusted Hunan Communications Planning & Designing Institute to prepare the Feasibility Study and the Project Proposal in March 1999. Upon the completion of which, HPCD further entrusted Hunan Environmental Protection Science Institute (HEPSI) to prepare Environmental Impact Assessment Report of Xiangjiang River Zhuzhou Navigation & Power Complex; Upon the receipt of the assignment, HEPSI promptly established an Environmenit Subject Assessment Division, which after carefully anall,zing the relevant project information, conducted a site survey at Zhuzhou Complex da.m & reservoir area, monitored the present regional environment and collected a serii3s of routine monitoring data regarding pollution source and water quality at the site. On which basis, the Environmental Impact Assessment Report of Xiangjiang River Zhuzhou Navigation & Power Complex was prepared. Besides the self-raised funds, Zhu;zhou Complex Project intends to apply to the World Bank for an $100 million loan. In accordance with the Assessments Categorizing Standards provided in Notification on Reinforcing Environmental Impacts Assessment Administration over Intemationaj Financial Organizations Funded Construction Projects reference No. [1993]3241 issued by National Environmental Monitoring Division (NEMD), the environmenlal Assessment of the Prcoject was categorized as Type A. 1.2 Assessment Objective The preparation of Environmental Assessment is designed 'to confirm the scale and extent of the impacts on the surrounding environments in order to work out practicai measures to avoid the adverse impacts and provide technical supports for engineering designs and environmental administration. 1.3 Assessment Basis The policies and regulations governing the environment assessments are listed as below: 1. Environmental Protection Law of People's Republic cif China, Water Pollution Prevention Law, Atmosphere Pollution Prevention' Law, Noise Pollution Prevention Law, Water & Sc il Conservation Law; 2. Construction Projects Environmental Protection Control Rules State Council Decree Reference No.: 253; 3. Notification on Reinforcing EFnvironmental Impacts Assessment Administration over International Financial Organizations Fundecl Construction Projects NEMD Reference No. [1992]324; 6  Environmental Impact Assessment 4. Hunan Xiangjiang River Drainage Area Water Pollution Prevention Regulations; 5. Functions Categorization of.Xiangjiang River Trunk Streams; 6. Xiangjiang River Trunk Streams Planning; 7. 0.D4.01 The World Bank Environment Assessment Guide; 8. The World Bank, OP4.01 Ervironmental Assessment; 9. Xiangjiang River Waterway Development Zhuzhou Navigation & Power Complex Project Feasibility 3tudy; and 10. Xiangjiang River Waterway Development Zhuzhou Navigation & Power Complex Project Environme,7t Assessment Outline. 1.4 Assessment Areas This project is composed of two phaises: construction phase and operation phase. The impacted area of the construction phase is the Kongzhou Dam site, while that of operation phase covers the entire 96km reservoir backwater area. The assessment areas are: (1) Reservoir and its vicinity: In operation phase, the impact assessment areas of the water environment, water organi:,ms and social environrnent include the 96km Xiangjiang River section between the dam site to Dayuandu and its vicinity. (2) Dam site vicinity: In the construction phase, the impacted ecological, atmospheric & acoustic environments and waters are within Kongzhou Dam site and its vicinity. In the operation phase, the impactecl, atmospheric and acoustic environments by the travelling automobiles on the dam are also within the Dam site (including the two 7km approaching highways at the both sides of the Highway Bridge on the dam). (3) Reservoir inundated area and the migrants: The assessment area includes the inundated farmland of 20,124 mu at the two sides of the reservoir, which involves 1,205 people to be resettled. (4) Hengshan Kilo-tonnage Dock Project: The impacts on acoustic and ecological environments will mainly arise in the construction phase. The impacts assessment area is within the 100m region outside the new dock factory boundary (the dock takes up a land area of 70 mu), while the impacts assessment area of water environment is the Xiangjiang River kilo-tonnage dock area between its upstream with a total length of 1 000m and its downstream with a total length of 1000m. 7  Environmental Impact Assessment (5) Zhuzhou to Xiangtan Kilo-tDnnage Waterway Dreciging Project: In the construction phase, the impacted water and ecological environments are within the Xiangjiang River section with a total length of 37km between Zhuzhou and Xiangtan. 1.5 Assessment Standards The executive standards reviewed and approved by Hunan Environmental Protection Bureau for environment assessment in this project are provided as below: (1) Water environment assessmerit standard In accordance with DB43/023 Functions Categorization of Xiangiiang River Trunk Streams, Hengshan County Water Supply Factory and the upstream (1000m) & downstream (100m) of Hengdong County Shiwan Town Water Supply Factory's water intake area are categorized as specially-protected water areas, therefore Water Quality Type 2 Standard specified in GHZB1 -1999 Surface Water environment Quality Standard is to be observed. The upstream of Dayuandu Cornplex to Xianghua Chemical Factory's water intake area with a total length of 1000m and the upstream of Hengshan County Guanxiangzhou to Hengdong County Shiwan Town Water Supply Factory's water intake area with a total length of 2OOOm are categorized as secondary protection areas, therefore Water Quality Type 4 Standard specified ill GHZBI-1999 Sufface Water environment Quality Standard is to be observed. Other waters are categorized as primary water protection areas, therefore Water Quality Type 3 Standard specified in GHZB1-1999 Surface Water environment Quality Standard is to be observed. (2) Atmospheric Environment Quality Standard Type 2 Standard specified in G33095-1996 Atmospheric Environment Quality Standard is to be observed for all assessment areas. (3) Acoustic Environment Quality 3tandard In construction phase, GB12523-93 Construction Site Noise Limit Value is to be observed; In operation phase, Type 4 Standard specified in GB3096-93 Urban Noise Limit Value is to be observe i for highways at the two sides of the Dam; And Type 1 Standard specified in GB$;096-93 is to be observed for present situation assessment. (4) Sewage Discharge Limits 8  Environmental Impact Assessment Limit Grade 1 specified in Generz) Sewage Discharge Lim,its is to be observed for sewage discharged to water areas of Type 2 & 3 specifiecd in GHZBI-1999. Limit Grade 2 specified in General Sswage Discharge Limits is to be observed for sewage discharged to water areas of Type 4 specified in GB8978-1996. 9  Environmental Impact Assessment Table 1-1 GHZB1-1999 Surface Water Environment Quality Standards (Unit: mg/I) Item PH Do CoD,, BoD5 NH3/N Volatile Total P Petroleum Total A, Total Hg Total Cd CPr Total Phenol Pb Tvpe It Standards 6.5-8.5 6 14 3 0.5 0.01 .05 0.1 0.00005 0.005 0.05 0.05 Type lil Standards 6.5-8.5 5 8 4 0.5 0.005 0.1 0.05 0 05 0.0001 0.005 0.05 0.05 TypeIVI Standards 6.5-8.5 3 10 6 1.0 0.01 0.2 0.5 0.1 0.001 0.005 0.05 0.05 Table 1-2 GB3095-1996 Atmospheric Environment Quality Standards (Unit: mg/m3) !tem. T_7 I C Mo 9 I I ~~~~~~~~________No, Annual Average Daily Average Annual Average Dail Average I Annual Average I Daily Average Standards Class 1 0.02 r 0.05 0 08 0.12 0.05 0.10 | Standards Class 2 0.06 | 0.15 0.20 _ 0.30 0.05 0.10 I Standards Class 3 010D .25 0030 0.50 5.1G O.t5 Table 1-3 Noise Limits (Unit: dB(A)) Item Construction Site Noise Limits GB3095-93 Urban Noise Limits Earthwork Pile-driving Structures | Fitting-up Type 1 Type Daytime 75 85 70 65 55 60 Night 55 Not Allowed 55 55 45 50 Table 1-4 GB8978-1996 General Sewage Discharge Limits (Unit: mg/l) r Item PH | SS BoD, COD | Petroleum | Volatile NH3/N Phosphate sulfide Total Hg Total Cd Cr| Total A. Total Pb r Itemf PH S 6005 f CO Petroleum Phenol ( iTtl fjTtlb Class 1 6-9 70 30 100 10 _ 0.5 15 0.5 1.0 0.05 | 0.1 1.5 0.5 1.0 Class II 6-9 1200_ 60 10 10 0.5 25 1.0 1.0 0.05 -10-  Environmental Impact A"assment Table 1-5 (GB4284-84) Sludge Pollutants Control Limits (Unit: mg/kg (dry sludge)) Item Maximum Allowable Content Acid soil (PH<6.5) Alkali and Neutral Soil Cd _ 6.5 20 Hg 5 15 Pb 300 1000 Cr 600 1000 As 75 75 Cu 250 500 Zn 500 1000 Remark: This standard is acceptable for sludge from sewage farm, sewage settling basin, some organic substance production, bottom sediment of rivers, reservoirs, lakes, ponds, water ditches, canal etc. 1.6 Objectives of Environmental F'rotection (1) To protect the living water source within the 96km reservoir area. According to the functional plan of regional water areas, living water sources in the reservoir area mainly include two places: the intake of Hengshan County Water Supply Factory and the intake of Hengdong County Shivwan Town Water Supply Factory. (2) To protect the ecological environment, including the water organisms, vegetation in the assessment area and Kongling an Tourist Attraction Site, 1km downstream from the Dam. (3) To protect the residents in the vicinity of the Dam from noise and dust pollution. Refer to Table 1-6 for Environmenta I Protection Areas Tablel-6 Environmental Protection Areas No. Areas Location Remarks 1 Hengshan Intake Dam Upstream Intake Capacity 1_ Hengshan Intake _At 86km 3 X 104t/d 2 Hengdong Shiwan Intake Dam Upstream Intake Capacity At 71.5km 2.5x 104t/d 3 Water Organisms Entire Fishes in Reservoir Area Reservoir Area i 4 _ Vegetation Dam SiteResettlement Area Konglinga TDam Downstream Attraction Sites 5 Konglingan Tourist Attraction _ Left bank at 1 km CompatibilitY Residential Area Prevent Noise and 6 In Vicinity of the Dam Residental Area Dust Pollution Water intake of Zhuting town located .Water intakefor Water intake of Zhuting and at 43km away from upstream of the draut shall be bofr Sanmen Towns dam and that of Sanmen Town at dran 5000V bd 4km away. -11-  Environmental Impact Assessment 1.7 Assessment Assignments The assessment is conducted by Hunan Environmental Protection Institute (HEPI), assisted by Hengyang Environmental Protection Institute (HYEPI) and Zhuzhou Environmental Protection Monitoring Station (ZEPMS). HEPI is responsible for the preparation of the Outline & the Report and partial site work. While ZEPMS and HYEPI are responsible for the site monitoring and pollution sources data-collecting. Hunan Environmental Protection Iristitute (HEPI), directly under Hunan Environmental Protection Bureau, is a secondary unit and has been engaging in the environmental assessment and management ever since the early 1980's. It has been categorized as National First Grade Unit. Over 50 Yo of the major or secondary projects' assessments were conducted by HEPI. Refer to Tablel-7 for Subject Assiclnments Table 1-7 Subject Assignments Subject Assignment Superintendent Job Title Certificate No. Summary Liu Jiawen Associate Researcher Changsha No.: 05767 Anaijsct Xiong Ruyi Associate Researcher No.95280 water Zhang Yuqing Researcher ADB No.95297 Ecolonical Liao Wenhui Associate Researcher Changsha No.: 05714 Environment Atmospnmenc Xiao Jingjie Researcher Changsha No.: 05897 Acoustic Liu Dingzhonc Associate Researcher Changsha No.: 05765 Environment . Social Environment Hu Yunquan Associate Researcher Changsha No.: 05790 - 12-  Environmental Impact Assessment 2. Outline of Project 2.1 Overview Zhuzhou Navigation Complex is located at Kongzhou, within Zhuzhou county in the downstream of Xiangjiang River. This project is categorized as Class III project, and the major buildings are designed according to the standards for Class III. The designed flood repetition period is 50 years and the check flood repetition period is 500 years. The site of Kongzhou Dam is recommended as the dam site for ZNCP, which is 83 km from Hengshan County, 24 km from Zhuzhou City, and 96 km from the completed dam site of Dayuandu Navigation Complex. It is located between Hengshan Hydrologic Station and Zhuzhou Hydrologic Station. Zhuzhou Navigation Complex F'roject (ZNCP) is an integrated project, which combines navigation, power generation, communications and irrigation. Main buildings in this project consist cf sluice gate, power plant house, navigation lock and highway bridge. The total conistruction phase is 5 years. It will take 32 months to complete the navigation lock and 36 months to put the first generating set into operation. The total investment is 1.814 billion RMB, which includes 1.753 billion RMB for the Navigation Complex Project and 0-017 billion RMB for Hengshan Kilo-tonnage Dock Project is and 0.014 billion RMB tor Waterway Dredging Projects. 0.1 billion USD will be loaned from world Bank and the balance will be obtained from the Ministry of Cornmunications and Hunan Province (i.e. subsidies and self-raised fund). According to the plane layout of lhe dam, power plant is placed on the left branch, with a 12-hole sluice gate, and a permanent navigation lock on the right branch, with a 14-hole sluice gate. The hieight of dam is 50.8 m and crest length 1068.5 m. The normal water level of the ren;ervoir of Zhuzhou Navigation Complex is 40.5m and the relative capacity 0.4743 billion m3. It is a low-dam runoff adjustable reservoir. After water is retained, the average surface width of the reservoir is about 600m. Water level at the enid of the dam is 3.5^-4.5 m lower than the banks and water level at the far end of the reservoir is 10'-12 rn lower than the banks. This reservoir is of channel-form reservoir, which does not affect the functions of the existing dams and water con servancy facilities. In order to meet the growing demand in communications development and operation and management in Zhuzhou city, a two-lane highway bridge is built on the dam crest. The highway connecting the bridge with 815 Provincial Highway is about 7km in length. The highway connecting the bridge with Bejing-Zhuhai Expressway is also 7km in length. The two connecting highways are designed -13 -  Environmental Impact Assessment according to the standards for Class l1l. The total construction time for this project is 5 years. The first phase will be 3 years, in which the first generating set on the left branch will be put into operation, the navigation lock on the right branch and the sluice gate on the left branch will be completed. The second phase will be two years , in which the sluice gate on the right branch will be completed. For the main buildings and structures, please refer to Table 2-1. For the main features of the reservoir, please refer to Table 2- 2. For the quantities and schedule of work, please refer to rable 2-3. - 14 -  Environmental Impact Assessment Table 2-1 List of Main Buildings and Structures Serial Description Unit Quantity Remarks No. A Sluice Gate 1 Type open type 2 Dam crest elevation m 50.8 3 Hole dimension(width X height) m 20X 19.7 4 Number of Holes 26 5 Weir crest elevation m 28.5 6 Totai length m 612.5 7 Mode of energy dissipation bottom-flow energy dissipation 8 Maximum gate height m 31.5 9 Maximum design head m 10.3 10 Gate type aro-type 11 Gate dimension(widthX height) m 20X 12.5 B Permanent Navigation Lock 1 Navigation standard + 2 Highest navigable level in the upstreari m 43.52 for 10-year encountered flood (P=10%) 3 Lowest navigable level in the upstream m 38.8 4 Highest navigable level in the m 43.35 downstream 5 Lowest navigable level in the upstream m 30.2 P-98% _ Maximum navigable flow m3Is 17600 7 | Minimum navigable flow m31s 330 8 Minimum design net empty height rn 10 9 Dimension of navigation lock m 180 x 23:x 3.5 (lengthxwidthxdepth) Design standard for gate-passing fleei 4 0ilo-tonnage ships 11 rFIeet dimensonm 165 x 21.6 x 2.0 da - 15-  Environmental Impact Assessment 12 Maximum design head m 10.3 C Buildings of the Power Plant I Total installed capacity MW 140 2 Number of installations 5 3 Single unit capacity MW 28 4 Unit type bulb tubular type 5 Output power MW 28.94 P=90% 6 Annual work time h 4575 7 Annual power production 1 08kwh 6.405 8 Maximum net head m 10.56 9 Minimum net head m 3.0 1 0 Weighted average head m 7.657.08 whole year/flood period 11 Flow of single unit m3/s 472.1 D Highway Bridge 1 Design standard automobile-20,trailer-1 00 2 Width m net9+2 x 1.5 3 length m 1450 E Auxiliary Works A Kloonnage dodckwi be Annual throughput 104t 17 built in Hengshan Table 2-2 Feature of the Reservoir Serial Item Unit Qty Remarks No. A Reservoir low-dam runoff type 1 Normal impounded level m 40.50 2 Minimum navigable level m 38.80 3 Capacity of reservoir at nonrmal 10C8M3 4.743 impounded level 4 Dead storage 10"m3 3.489 5 Reservoir area at normal impounded level km2 58.9 Damming length at normal impoun Jed 96 6 ~~~~~ ~~level m9 -16 -  Environmental Impact Assessment 7 Inundated Population 1165 Ag1ricultural population is 612 Brick-ooncrete building 8 Inundated Buildings Area m2 68737 area is 41530m2 9 Inundated Farmland mu 20124 17339mu can be prevented. B Flood flow and downstream water Level 1 Design flood flow M3/s 22200 P=2% 2 Design flood level m 45.65 3 Check flood flow M3Is 28200 P=0.2% 4 Check flood level m 47.80 Table2-3 Quantities and Schedule of Works Serial Description Unit Quantity Remarks No. A Work Amount 1 Excavation of earth and stonE 104m3 561.74 2 Filling of earth and stone 1 04m3 340.49 3 Concrete 1 04m3 66.84 4 Reinforced bar t 18577 5 Grouted stone 1 04m3 10.57 6 Grout curtain m 13386 7 Consolidated curtain m 11781 8 Metal structure 104t 1.2861 B Work schedule 1 Total construction time year 5 2 Operation of thel sT generating sat Month 36 - 17 -  Environmental Impact Assessment 2.2 Auxiliary Works 1). Special-purpose Highway According to the topography of the dam site, requirements of body building construction and the navigation complex layout, temporary special-purpose highways shall be built to reach slag yard, dock, sand & stone processing system, concrete system, explosive magazine and the road around the weir. Total length of these temporary highways oF cement pavement is 3.7km. There are no environment-sensitive points along these highways. 2). Stone Pit and Slay Yard Stone Pit: Shanshanwu Stone P t is primarily determined as the self-provided stock ground, which is 10.5 km ;way from the dam site, with limestone as its major composition. Thickness of stone layer is 15-20 m. The exploitable area is 15,000 m2 and its reserves is 0.22-0.30 million m3. Ground exploitation method shall be employed. Both stone quality and exploitation conditions are good. In the northeast and southwest of stone pit are settled a few local residents; In the west are oil-tea camellia fields; In the east is a pool. There are no environment- sensitive points around the stone pit. The stone pit is connected to the dam site by a temporary highway. Slag Yard: There will be a slag ya,d on each side of the dam. Dachong Slag Yard (on the left side of dam) is mainly reserved for the slag produced during the first phase of this project. It is about 1.5km away from the dam site. Changtangchong Slag Yard, Jipochong Slag Yard and Shangganli Slag Yard are located on the right side of the dam and reserved for slag and solids produced during the second phase of this project. They are far away from the dam site with their average distance being aboLt 2.5 km. 3) Living Quarters and Work Shed Living quarters for the staff and the office building are proposed to the built on the left bank of Xiangjiang River. Wo-ker's temporary shed and material warehouse shall be built on both banks of Xiangjiang River. Accor(ding to the analogous analysis of Dayuandu Navigation Complex Project, the peak population on the site is about 4,000 during construction. 4)Auxiliary Work-Hengshan Kilo-tonnage dock: Hengshan Kilo-tonnage dock shall be built as an auxiliary work of ZNCP. It will have only one berth, with its throughput being designed to be 0.18 million ton in 2005 and total investment being 1.692 million RMB. The newly-built Hengshan -18-  Environmental Impact Assessment Kilo-tonnage dock will mainly handle general cargo transportation, especially nonmetal ores as well as cement, fertilizer, and cereals. 5)Dredging the Waterways from Zhuzhou to Xiangtan for Kiloton Ships Waterways from Zhuzhou to Xiangtan is 37 km in length, where there are 8 shoals. The waterways shall be dredged so that 1 Kilo-tonnage fleet of 4 ships can navigate from Chenglingji to Hengyang. Total investment is 1.458 million RMB. 6) Number of Staff and Workers 442 staff and workers shall be needed for this project, which includes 327 staff and workers for the power plant and 68 staff and workers for navigation lock. - 19-  Envircnmental Impact Assessment 3. Present Environmental Situation 3.1 Natural Environment 3.1.1 Geographic Location The Kongzhou Dam' site is 24km upstream from Zhuzhou city, 6 km upstream from Zhuzhou county, 158km downstream from Hengyang city and 96km downstream from the Dayuandu Navigation and Power Complex. There are highways passing on both banks of the proposed dam. It connects with 107 National Highway, Jingzhu Expressway and 1815 provincial Highway. The Jingguang Trunk Railway runs on its right bank. 3.1.2 Engineering Geology The topography of dam-site is broad. The left bank is conglomerate hillock and the right bank is sedimentary terrace which can be divided into class 1, 11, and Ill. The bottom bedrock elevation of the terrace and ground water table are higher than the normal reservoir level (El. 40.15m), there are reliable abutment joints. There are shoals in the river. The overburden thickness of the silty sand and pebble of the shoals is 10-14m. The pebble overburden on both sides of riverbed is 2-3m in thickness. The underlying bedrock of right bank and riverbed consists of purplish red weakly weathered conglomerate and sandy conglomerate and the right bank consists of muddy silt-stone with conglomerate. The bearing capacity of rocks can fully meet the requirements of the proposed structures and it has weak permeability. The bedrock on left and right bank dips towards left and right bank with an angle of 5.200 and the rocks are intact with no serious fracture zones. Gravel bed in the riverbed and right terrace has good hydraulic permeability. Therefore, special permeation-proof measures shall be taken. The bed rock is exposed on its left bank. The side slope is stable. The right bank also exists outcrops near waterbody. 3.1.3. Meteorological Features Climate is mild within the reservoir area and four seasons are sharply contoured. It has sufficient heat. The annual average temperature is 16-18