Middle Route Project of South-to-North Water Transfer Project

Main entrance: Middle Route Project of South-to-North Water Transfer Project

1959 "Report on Key Points of Yangtze River Basin Utilization Planning" puts forward that the overall layout of the South-to-North Water Transfer Project is to transfer water from the upper, middle and lower reaches of the Yangtze River respectively. The middle route project takes water from Danjiangkou reservoir, and the prospect is to transfer water from the main stream of the Yangtze River. 1September, 1958, when the Ministry of Water and Electricity approved the manual valve service book for the preliminary design of Danjiangkou Water Control Project, it made clear the tasks of irrigating Tangbai River Basin and Huanghuai River with the Han River.

Danjiangkou Reservoir 1968 is filled with water, the head of Qingquangou Irrigation District 100 m3/s is completed, and the head of Taocha Channel, the main diversion channel of Hanjiang River, 1974 is completed (the designed diversion flow is 500 m3/s, which can reach 1000 m3/s in the later stage).

1978 10, the Ministry of Water and Electricity urgently issued the Notice on Strengthening the Planning of the South-to-North Water Transfer Project, requiring that the revision and supplement of the South-to-North Water Transfer Project be reported in time. Relevant units have further developed the planning of the South-to-North Water Transfer Project.

From 65438 to 0980, the Ministry of Water Resources organized leaders, experts and professors from relevant provinces and cities, ministries and commissions, scientific research departments and universities to conduct a comprehensive survey of the water source area of the Middle Route Project and the line from the head of the canal to Beijing. Before and after the investigation, the Yangtze River Committee put forward the Report on Key Points of the Middle Route Project of South-to-North Water Transfer Project and its supplementary report. The mid-line engineering scientific research plan was formulated and officially issued by the Ministry of Water Resources in 198 1 year. Later, according to the plan, the Yangtze River Committee and the Ministry of Geology and Mineral Resources carried out engineering geological exploration in the north and south of the Yellow River respectively, and the Institute of Geography of the Chinese Academy of Sciences analyzed the experience of rivers, Huaihe River, Yellow River and sea.

1983 The State Planning Commission listed the Middle Route Project of South-to-North Water Transfer Project as a key project in the early period of the Sixth Five-Year Plan. In cooperation with other provinces and cities, the Yangtze River Committee has completed the planning report of 1987 Middle Route of South-to-North Water Transfer Project, focusing on the initial scale water transfer scheme of Danjiangkou Reservoir. The Ministry of Water Resources organized the review in two stages as planned. After the first-stage review, the Yangtze River Committee conducted supplementary research according to the requirements of the meeting, which was formally reported in 1988 and submitted to the competent leader of the Ministry, but the second-stage review was not carried out. 1990 5438+00 In June, the Ministry of Water Resources issued a document requesting to "complete the feasibility study and design task book of Danjiangkou Water Control Project and its later diversion scheme".

199 1 year1kloc-0/month The Yangtze River Committee put forward the Planning Report of the Middle Route of South-to-North Water Diversion Project (revised in September/990) and the Preliminary Feasibility Study Report of the Middle Route of South-to-North Water Diversion Project, which made it clear that the Middle Route Project will mainly provide urban domestic and industrial water, giving consideration to agriculture and industry.

At the end of 1992, the Yangtze river commission put forward the feasibility study report of the middle route project. After the Ministry of Water Resources and the international consulting company respectively organized large-scale method reviews on major issues such as water regulation, storage regulation measures, main canal, yellow river crossing project and investment estimation, the Ministry of Water Resources reviewed and approved the feasibility study report in early 1994, and agreed to increase Danjiangkou water control project with an annual water transfer plan of 147 billion cubic meters. This plan has also been approved by the State Planning Commission and the five provinces and cities of Beijing, Tianjin, Hebei, Henan and Hubei.

1995, the state environmental protection bureau also officially approved the environmental impact report of the middle route project of south-to-north water transfer.

1995, the State Council decided that the East, Middle and West Third Lines should be demonstrated by the Ministry of Water Resources and audited by the State Planning Commission. By1March, 1998, it was concluded that the third route of South-to-North Water Diversion Project was necessary. The middle route project was designed to increase Safin flow by 630 cubic meters per second and 800 cubic meters per second for Danjiangkou Reservoir dam and main canal.

From 65438 to 0994, the Ministry of Water Resources examined and approved the feasibility study report of the Middle Route of South-to-North Water Transfer Project, and pointed out in the review opinion: "In the next stage, we should pay close attention to the necessary supplementary work, and prepare the overall design of the main canal and the preliminary design of Danjiangkou Reservoir for approval respectively." According to this requirement, the Yangtze River Committee and relevant provinces and cities along the main canal have carried out preliminary design work.

20 10 On March 26th, the middle route project of South-to-North Water Transfer Project, the largest modern artificial canal in China, officially broke ground.

In 20 13, the main body of the first phase of the Middle Route of South-to-North Water Transfer Project was completed, which was the earliest project to pass water after the flood in 20 14, when the Yangtze River water will be replenished to Beijing and Tianjin. If the main pressure of the eastern route project lies in pollution control, then the main problem of the middle route project lies in immigration.

In the afternoon of 20 14, 12, 1432 km long, 1 1 old, the middle route of the South-to-North Water Transfer Project was officially opened, and the Yangtze River water officially entered Beijing. The water quality of Danjiangkou Reservoir, the water source, is always above the national Grade II water quality, and the design of "double closed" channel ensures the water quality safety along the way. After the water is connected, it can deliver 9.5 billion cubic meters of water to the north every year, which is equivalent to 1/6 Yellow Rivers, basically alleviating the serious water shortage in the north. The Middle Route of South-to-North Water Transfer Project is a water conveyance project that takes water from the east bank of Danjiangkou Reservoir in the middle and upper reaches of the Hanjiang River, the largest tributary of the Yangtze River, passes through Fangcheng Pass in Nanyang, Jianghuai watershed, excavates channels along the western edge of Tangbaihe River Basin and Huanghuaihai Plain, crosses the Yellow Tunnel in Wangcun, Xingyang City, Henan Province, and goes north along the west side of Beijing-Guangzhou Railway to Tuancheng Lake in Beijing Summer Palace.

The adjustable water volume of the middle route project is completed according to the later scale of Danjiangkou Reservoir, and the normal water level is1.70m.. Considering the development level in 2020, some compensation projects need to be done in the middle and lower reaches of the Hanjiang River to ensure the industrial and agricultural development, shipping and environmental water use in the transfer area. The average adjustable water volume for many years is141400 million cubic meters, and the average dry year is about 65.44 billion cubic meters (the guarantee rate is 75%).

The water supply scope is mainly in the central and western parts of Tangbaihe Plain and Huanghuaihai Plain, with a total area of about 654.38+0.55 million square kilometers. The project focuses on Henan, Hebei, Tianjin and Beijing, and more than 20 large and medium-sized cities along the route provide domestic and production water. And give consideration to the ecological environment and agricultural water use along the line. The total length of the central trunk water conveyance canal is 1267 km, and the total length from the trunk water conveyance canal to Tianjin is 154 km.

On the afternoon of 20 14 12 12 14: 32, the middle route project of South-to-North Water Transfer Project was officially opened. Choosing 14: 32 separation means that the total length of the main canal in the middle route of South-to-North Water Transfer Project is 1432 km.

Project cost of the middle route of South-to-North Water Transfer Project: By the end of June 2009, the accumulated investment in the east and middle routes of South-to-North Water Transfer Project was 58.97 billion yuan, and the accumulated investment was 365.438+43 billion yuan; By the end of July, 2004, the State Council South-to-North Water Diversion Office had issued a total investment of 252.5 billion yuan for the first phase of the East and Middle Route of the South-to-North Water Diversion Project, and the total investment for construction projects was 249/kloc-0.1 billion yuan. The middle line project is to heighten Danjiangkou Reservoir Dam, with total length of main canal 1.432km, designed diversion flow of 800 m3/s and diversion volume1.45m3..

The water conveyance project is mainly open channel, and the local canal section adopts the combination of pumping station and pressurized pipeline to convey water. The open channel canal is located at the head of Taocha diversion sluice of Danjiangkou Reservoir, and the Beijing section is located at the end of the main canal, with the smallest flow. The whole section uses pipeline to deliver water, and the end point is Tuancheng Lake in Beijing. Tianjin trunk canal line is recommended to adopt the scheme of "Xinkaidian North Line", which starts from West Montenegro and ends at Outer Ring River. The main water conveyance canal adopts the combination of open channel and pipeline. Including Tianjin main canal? The total length of the line is 1420km, with *** 1750 buildings.

The important content of the Middle Route Project is to heighten the Danjiangkou Reservoir Dam from the original162m to176.6m, and the water level should be raised from157m to170m. Therefore, the upper reaches of Danjiangkou Reservoir need to be flooded 1.44 square kilometers, with 345,000 migrants.

There are many buildings in the middle line project, and the engineering quantity is huge, but the line is long, the buildings are relatively scattered, and the construction site is wide, so the construction can be carried out at the same time by items and sections. The total construction period from construction to water supply is controlled by the Yellow River crossing project, which takes about 56 months. The total construction period of Danjiangkou reservoir dam project is 60 months, and the heightening of the dam is not the control condition for the water supply of the main water conveyance canal.