Nierji Reservoir is located on the main stream of Nenjiang River at the junction of Heilongjiang Province and Inner Mongolia Autonomous Region. The right bank of the dam site is nierji town, Molidawa Daur Autonomous Banner, Inner Mongolia Autonomous Region, and the left bank is Erkeqian Township, nehe city City, Heilongjiang Province. The highway mileage is about 189Km away from the industrial town of Qiqihar. Nenjiang River originates from Ilhuli Mountain in Daxing 'anling, flows through Heilongjiang, Inner Mongolia and Jilin provinces (autonomous regions) from north to south, and flows into Songhua River at Sancha River in Zhaoyuan County, Heilongjiang Province, with a total length of 1.370km and a drainage area of 297,000 Km2. The control basin area above the dam site is 66,400 Km2, accounting for 22.4% of the total area of Nenjiang River basin, and the average annual runoff is 65.438+0.047 billion m3, accounting for 45.7% of Nenjiang River basin area.
I. Project Task and Scale Nierji Water Control Project is a large-scale water conservancy project approved by the tenth five-year plan of the state, and it is also one of the landmark projects for the state to implement the strategy of developing the western region. It has comprehensive benefits such as flood control, industrial and agricultural water supply, power generation, shipping, environmental protection, fish culture and reed cultivation. It is a control project for the development and utilization of water resources and the prevention and control of flood and drought disasters in Nenjiang River Basin, and it is also an important water source project to realize the "South-to-North Water Transfer Project". The total storage capacity of Nierji Water Control Project Reservoir is 8.665438 billion cubic meters, including 2.368 billion cubic meters for flood control and 5.968 billion cubic meters for Li Xing, with a total installed capacity of 250,000 kilowatts and an average annual power generation of 638.7 million kWh. After the completion of the project, the flood control standard of Qiqihar can be improved from once every 50 years to once every 100 years, from once every 20 years to once every 50 years in the reach from the hub to Qiqihar, and from once every 35 years to once every 50 years in the reach below Qiqihar. In the design level year, the reservoir provides 65.438+0.29 billion m3 of industrial and domestic water for downstream cities, which can meet the water demand of important cities such as Qiqihar, Daqing and Harbin. The water supply for agricultural irrigation is 65.438+64.6 million m3, which can increase the irrigation area in the lower reaches to 4.54 million mu. Shipping water supply is 820 million m3, environmental water supply is 475 million m3, and wetland water supply is 328 million m3, improving downstream shipping conditions and ecological environment. At the same time, it can increase the peak-shaving ability of Heilongjiang power grid and alleviate the problems of insufficient peak-shaving ability and serious imbalance in the proportion of hydropower and thermal power.
Two. Hub layout and main buildings Nierji Water Control Project is mainly composed of main dam, auxiliary dam, spillway, hydropower station and irrigation tunnel (pipe) and other buildings. This project is a class I project, with the main building grade of Grade I and the seismic fortification intensity of Grade VII. The total length of the dam is 7 180m, and the maximum dam height is 41.5m. The main dam is an earth-rock dam with asphalt concrete core, and the crest length is 1676m. The auxiliary dams on the left and right banks are earth-rock dams with clay core. The spillway structure is an open bank slope spillway, which is arranged on the Baitushan platform on the right bank. The length is 875.5m, the width is166.0m, the spillway tunnel is 1 1 each, and the width of a single hole is12m. The elevation of dam crest is 199.80m, and the maximum discharge of spillway is 20300m3/s. The hydropower station is a riverbed power station, equipped with four ZA 725-LH-642 hydro-generator sets, each with a capacity of 62.5MW.
Three. The total construction period of the project is 5 years. Preparations began in June 20001year, and the first unit generated electricity in May 2005. The diversion mode of Nierji Water Control Project is divided into two phases, the first phase is open channel diversion, and the second phase is temporary bottom hole diversion. The total amount of earthwork excavation is 7,048,600 m3, the total amount of earthwork filling is 9107300 m3, the total amount of concrete pouring is 808,700 m3, and the total amount of asphalt concrete is 40,000 m3. The maximum daily average strength of earthwork excavation is 65,438+600,000 m3/d, the maximum daily average strength of stone excavation is 780,000 m3/d, the maximum daily average strength of earthwork filling is 65,438+820,000 m3/d, and the maximum daily average strength of concrete pouring is 240,000 m3/d ... The external traffic of this project is mainly to expand the 29-kilometer third-class highway from nierji town in Moqi, Inner Mongolia Autonomous Region to nehe city Railway Station in Heilongjiang Province, and build an 8,000,000-kilometer highway under
Four. Reservoir inundation and resettlement The reservoir inundation covers 66 administrative villages in 8 towns of nehe city, Nenjiang County and Moqi, Inner Mongolia Autonomous Region, and a small part of 2 forest farms and 3 farms are inundated. The flooded area is 483 square kilometers, the cultivated land is 340,000 mu, the houses are 865,438+200,000 square meters, and the relocated population is 52,000. The compensation for reservoir inundation treatment is 2.436 billion yuan. The resettlement of reservoir immigrants aims at not reducing the per capita income of the original cultivated land. According to the characteristics of abundant cultivated land resources in this area, priority should be given to developing agriculture, vigorously developing characteristic agriculture and aquaculture that local farmers are familiar with, and at the same time, combining with the development of water resources in the reservoir area, developing aquaculture and tourism services.
Verb (abbreviation of verb) Project investment According to the preliminary approval of the Ministry of Water Resources, the static total investment of the project is 5 1.5 1 billion yuan, and the total investment is 5.38 billion yuan. The financing methods for hub construction are: Heilongjiang Province contributed 500 million yuan, Inner Mongolia Autonomous Region contributed 389 million yuan, applied for bank loan of 65.438+339 million yuan, and the rest was arranged by the central water conservancy infrastructure investment.
Six, project construction management in the construction management mechanism, the implementation of the owner responsibility system, bidding system and construction supervision system. In terms of investment mode, the Ministry of Water Resources, Heilongjiang Province and Inner Mongolia Autonomous Region will contribute funds, and the company will apply for the use of domestic bank loans for the power sector. The Ministry of Water Resources, as the main body of investment on behalf of the state, exercises the functions of the authorized party of state-owned assets. In the specific organization and management form, the Ministry of Water Resources entrusted Songliao Committee to establish Nenjiang Nierji Water Conservancy and Hydropower Co., Ltd. in conjunction with Heilongjiang Province and Inner Mongolia Autonomous Region. As the project owner, he is responsible for the whole process of project planning, fund raising, construction implementation, production and operation, debt repayment and asset preservation and appreciation, and bears risks. The company's capital is invested and approved by three parties according to the ratio of 4:3:3 respectively. After the project proceeds to pay off the loan, it will enjoy the proceeds or bear the business risks according to the proportion of capital contribution. The company is a state-owned enterprise legal person with independent accounting, independent operation and self-financing. In the process of project preparation and construction, a joint meeting system between the competent minister and the governor (chairman of the autonomous region) shall be established to give full play to government functions and coordinate and solve major problems in project preparation and construction. The company implements the policy of focusing on one industry and diversified business, mainly undertaking the construction and management of Nierji Water Control Project, and giving full play to the comprehensive benefits of flood control, water supply, power generation, shipping and environmental protection. At the same time, the company also runs water resources development, water conservancy and hydropower project construction consultation, supervision, construction, reservoir development and property management in Nenjiang River and other basins. Organization chart The company has a board of directors and a board of supervisors. The board of directors consists of seven people, and the chairman is the legal representative. During the construction of Nierji Water Control Project, the board of directors exercised the coordination and management functions of some governments. The chairman is the director of Songliao Committee, and the board members of the two provinces (autonomous regions) are led by the Planning Commission and the Water Resources Department respectively. The company implements the general manager responsibility system under the leadership of the board of directors, and the general manager is responsible for the production, operation and management of the company. During the construction period, the company has 7 departments and 73 employees. On March 5th, 20001,the first meeting of the first board of directors of Nenjiang Nierji Water Conservancy and Hydropower Co., Ltd. was held in Changchun. Vice minister of water resources asked to inspect the construction site. Seven. In order to improve the downstream flood control conditions, raise flood control standards and develop the abundant water resources of Nenjiang River, reservoirs have been selected as priority control projects in previous studies on the planning and development of Nenjiang River Basin.
Since the 1960s and 1970s, relevant state ministries, local governments and relevant departments have carried out planning, survey and design. After the mid-1980s, Songliao Committee and four northeastern provinces (autonomous regions) made detailed plans for the comprehensive utilization of water resources in Songhua River Basin. In the comprehensive development and utilization plan of Liaohe and Songhua River Basin approved by the State Council 1994, Nierji Water Control Project was recommended as the first-stage development project for the comprehensive development and utilization of water resources in Songliao River Basin. At the end of 1990s, Nierji Water Control Project carried out a lot of feasibility studies and preliminary design work, and passed the examination of relevant state departments. Approved by the State Council in June 2000. In May 2006, the feasibility study report of 5438+0 passed the evaluation of China Consulting Company. 200111On October 27th, the State Planning Commission issued a notice to relevant departments (Beijing 200 125 14): the request of the State Planning Commission for approving the feasibility study report of Nierji Water Control Project was approved by the State Council, the Ministry of Water Resources and the two provinces. According to the requirements of the State Planning Commission, the Ministry of Water Resources and two provinces (autonomous regions) signed a letter of intent for the joint construction of Nierji Water Control Project; The first meeting of the leading group for the preparatory work of Nierji Water Control Project has been held. The board of directors of Nenjiang Nierji Water Conservancy and Hydropower Co., Ltd. has twice passed the Agreement on the Joint Construction of Nierji Water Control Project by the Ministry of Water Resources, Heilongjiang Province and Inner Mongolia Autonomous Region, the Investment Agreement for Nierji Water Control Project, the Bidding Scheme and Bidding Scheme for Nierji Water Control Project, the main principles of the compensation investment contract for reservoir flooding control, and the company's establishment plan, articles of association and rules of procedure of the board of directors. Eight. Preparation for the construction of Nierji Hydro-junction Project Since the public tender was issued by the construction supervisor on April 26th, 2006, the tender for the first-phase diversion project, traffic bridge under dam, sand and gravel mining and processing and concrete mixing project, dam foundation treatment and off-site highway project have been completed one after another, ensuring that the project is implemented as planned. In the process of construction, Nierji Company, as a legal person of the project, gave full play to the leading role of construction management, established and improved various guarantee systems, and created good construction conditions for the construction. The supervision unit did its duty, gradually explored the characteristics of the northeast water conservancy project construction, gave full play to its role, and ensured the construction quality and progress requirements. In the case of tight time and heavy tasks, the design unit solved the related design problems in time, ensured the construction period and saved the construction funds. Since the construction unit entered the site, it has overcome many unfavorable factors such as harsh natural weather conditions, tight construction period and high intensity, and strived to achieve the expected goal. According to the construction schedule of Nierji Project, 200 1 * * requires 843 households with 3093 people, including 638 households with 2323 people in the reservoir area and 205 households with 770 people in the dam area. Immigration agencies at all levels have overcome difficulties such as tight funds, short construction period and heavy tasks, so that the resettlement work in the reservoir area and dam area basically meets the requirements of the construction land of the hub project and the closure of the first-stage cofferdam, creating favorable conditions for the project construction. With the joint efforts of many parties, Nierji Water Control Project was successfully closed on October 8th, 2006/KLOC-0.