The idea of South-to-North Water Diversion Project was put forward in 1952 when President Mao Zedong visited the Yellow River. Since then, through the analysis and comparison of more than 50 schemes, the water transfer scheme has achieved many valuable results. The planning area of South-to-North Water Transfer Project involves a population of 438 million, and the water transfer scale is 44.8 billion cubic meters.
The total length of the east, middle and west trunk lines planned by the project is 4350 kilometers. The first phase of the East and Middle Lines is 2,899 kilometers long, and the first-class supporting branch canals in six provinces and cities along the line are about 2,700 kilometers.
From 2065438 to September 2002, the relocation of migrants in Danjiangkou reservoir area of the Middle Route of South-to-North Water Transfer Project was fully completed. The South-to-North Water Transfer Project mainly solves the problem of water shortage in northern China, especially in the Huang-Huai-Hai River Basin, with a population of 438 million.
* * * There are three water transfer lines, namely the East Line, the Middle Line and the West Line, which are connected with the Yangtze River, the Yellow River, the Huaihe River and the Haihe River, forming an overall layout with "four horizontals and three verticals" as the main body, which is helpful to realize the rational allocation pattern of water resources in China.
The Middle Route Project of South-to-North Water Transfer and the East Route Project of South-to-North Water Transfer (Phase I) have been completed, and water has been transferred to the northern region. The west line project is still in the planning stage, and construction has not started.
As of June 3, 2020, the first phase of the Middle Route of South-to-North Water Transfer Project has safely delivered water for 2,000 days, with a cumulative delivery of 30 billion cubic meters to the north, benefiting 60 million people along the route. Among them, the safety factor of water supply in the central city of Beijing has increased from 1 to 1.2, and the shallow groundwater level in Hebei Province has increased from 0.48 meters per year before treatment to 0.74 meters.
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Advantages and disadvantages of South-to-North Water Transfer Project;
First of all, the South-to-North Water Transfer Project has caused a wide range of social disputes since it was put forward. Opponents mainly think that the South-to-North Water Diversion Project is expensive, involving a large number of immigrants, and the water regulation is too small to bring economic benefits into play, while the water regulation is too large. The dry season may make the Yangtze River short of water, affect the navigation of the Yangtze River channel, deepen the salt tide in the Yangtze River estuary, and more easily lead to the natural environmental and ecological crisis in the Yangtze River basin.
Second, after the implementation of the South-to-North Water Transfer Project, the original flood storage and power generation function of the Three Gorges Project has been controversial. The simultaneous effects of the Three Gorges Project and the South-to-North Water Diversion Project may have an immeasurable impact on the middle and lower reaches of the Yangtze River (including ecology and shipping), especially in the dry season and dry season.
3. Liu Shukun, chief engineer of Institute of Hydraulics, China Academy of Water Resources and Hydropower Research, and chief engineer of Disaster and Environment Research Center, questioned that the South-to-North Water Transfer Project was due to the drought in southwest China at the beginning of 20 10. He believes that the once-in-a-century drought in southwest China should be corrected and the frequency and possibility of drought should be reassessed.
4. The relocation of nearly 330,000 people in Henan Province, the Middle Route Project of South-to-North Water Transfer, has brought turmoil to the lives of immigrants. Some immigrants can only buy a small piece of cultivated land because of insufficient compensation after buying the housing provided by the government.
5. The cost of the South-to-North Water Transfer Project has been higher than the existing cost of seawater desalination. At present, the lowest cost of seawater desalination is about 3 yuan, and the current cost of South-to-North Water Transfer Project is about 18 yuan. It is also reported that it has reached 18 yuan.
6.20 1 1 In the first half of the year, the three provinces of Hunan, Hubei and Jiangxi in the lower reaches of the Three Gorges suffered an unprecedented drought, and more than 300 reservoirs in Hubei Province alone were below the dead water level. The water levels of Poyang Lake, Dongting Lake and Hongze Lake are seriously low, and the largest freshwater lake in China has only one tenth of the water area. This series of events has aroused widespread doubts about the Three Gorges Dam from all walks of life.