The largest project in the world

The largest water conservancy project in the world is the South-to-North Water Transfer Project. What do you know about it? The following is the world's largest water conservancy project information I collected, welcome to read!

Brief introduction of South-to-North Water Transfer Project

Since1952101October 30th, President Mao Zedong has proposed? There is more water in the south and less water in the north. Is it okay to borrow some water if possible? Since the conception, under the leadership and care of the CPC Central Committee and the State Council, the vast number of scientific and technological workers have done a lot of field exploration and measurement, and on the basis of analyzing and comparing more than 50 schemes, they have formed the basic scheme of transferring water from the east line, the middle line and the west line of the South-to-North Water Transfer Project, and achieved a lot of valuable results.

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.

The final water transfer scale of the South-to-North Water Transfer Project is planned to be 44.8 billion cubic meters, including 654.38+04.8 billion cubic meters in the east, 654.38+03 billion cubic meters in the middle and 654.38+07 billion cubic meters in the west. The construction time will take about 40-50 years. After completion, it will solve the problem that more than 7 million people drink high fluorine water and brackish water for a long time.

Negative effects of South-to-North Water Transfer Project

Since the South-to-North Water Diversion Project was put forward, it has caused extensive debates in society. Opponents mainly think that the South-to-North Water Diversion Project has a high cost, involves a large number of immigrants, and the amount of water transferred is too small to exert economic benefits. Too much water transfer may make the water in the dry season of the Yangtze River insufficient, affect the navigation of the Yangtze River channel, deepen the salt tide in the Yangtze River estuary, and more likely lead to the natural environment and ecological crisis in the Yangtze River basin. Under construction? Third line? At the same time, the impact scope and duration of the water transfer scheme on the ecological environment may still exceed the imagination of domestic experts.

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.

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 the South-to-North Water Transfer Project because of the drought in southwest China at the beginning of 20 10.

The Middle Route Project of South-to-North Water Transfer has resettled 330,000 people in Hubei Province and Henan Province, which 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. However, there are few job opportunities in resettlement places, and some people have to plan to leave their homes to work in big cities.

Environmental damage caused by South-to-North Water Transfer Project

? Third line? At the same time, water diversion has led to immeasurable changes in the ecology along the Yangtze River, which is not conducive to protecting the existing ecology along the Yangtze River. This may lead to the decrease of channel capacity in the dry season of the Yangtze River. The scope and degree of its ecological impact has greatly exceeded that of China? Expert? The scope of our understanding.

The interaction between the Middle Route Project and the Three Gorges Project has caused environmental changes in the middle and lower reaches of the Hanjiang River and the Yangtze River, and caused incalculable losses to Wuhan and Hubei.

The influence of the East Route Water Diversion Project on the Yangtze River Estuary leads to the secondary salinization of the soil in the northern irrigation area.

New Plan of South-to-North Water Transfer in 2020

The expansion of Yizhuang regulating pool, Hexi branch line and Daxing branch line all broke ground yesterday, which marked the comprehensive start of the third phase of Beijing South-to-North Water Transfer Project. The project will be completed and put into use from 20 18 to 2020, which will improve the water supply security of Beijing city sub-center, new airport and Fangshan, Daxing, Mentougou and other new cities.

? Equipment and personnel have been put in place, and it is required to start the expansion project of Yizhuang regulating pool in an all-round way! ? At 2 o'clock yesterday afternoon, in the misty spring rain, the construction site on the east side of Daxing Nanhaizi Park was waiting. With an order, several excavators waved buckets and officially started the expansion project. After this expansion, the storage capacity of Yizhuang Regulation Pool will increase from 525,000 cubic meters to 2.6 million cubic meters, which is more than the storage capacity of a Kunming Lake. ? The expansion part of the regulating tank presents a satisfactory shape, which is composed of the first phase project. Ruyi holds the seal? . ? Cui Jia, the project director, showed the reporter the planning effect map.

According to reports, the function of the regulating pool is to store water, distribute water and divide water. After Nanshui enters Beijing, it must first enter Yizhuang Regulation Pool, where it is connected with the original water source in Beijing, and then it enters the water supply network and flows into thousands of households. The regulating tank not only supplies water to the waterworks, but also undertakes the tasks of water quantity matching and water source switching. After the expansion, its storage capacity will be greatly increased, which will create conditions for joint dispatching in the southeast urban area and improve the water supply safety in the southeast of the city, especially in the Beijing Sub-center.

On the same day, the Hexi branch line and Daxing branch line projects also started construction. Hexi Branch Project will supply water for Fengtai Hexi No.3 Water Plant, Shougang Water Plant and Chengmen Water Plant, and provide backup water for Fengtai Hexi No.1 Water Plant, Chengzi Water Plant and Shijingshan Water Plant, focusing on solving the water demand in Fengtai Hexi and Mentougou areas and improving the water supply safety in Shijingshan area. It is planned to have water supply conditions in 2020. Daxing Branch Line Project connects Beijing South Main Canal with Hebei Zhuo Lang Main Canal, adding a new channel for the city to supply water to Beijing from the south, mainly facing the southern region including the new airport. It is planned to have water supply conditions by the end of 20 18.

According to the plan, before 2020, the supporting project of South-to-North Water Transfer Project in Beijing will be built in three phases. The first two stages have been completed and put into use, and the underground water conveyance loop will be basically built along the West Fourth Ring Road and the East, South and North Fifth Ring Roads. Wang Jianbin from the Investment Planning Department of the South-to-North Water Diversion Office said that at present, the city has accumulated 2.07 billion cubic meters of water, which greatly eased the situation of water shortage in the city. However, with the construction of key functional areas such as Beijing Sub-center, new airport and Expo venues, new requirements have been put forward for water supply in this city. Urban and rural water supply is still unbalanced, and it is urgent to expand the scope of water supply for South-to-North Water Transfer Project. In order to solve these problems, the city has accelerated the construction of the third phase project.

In addition to the three major projects, the city will also speed up the eastward extension of the South-to-North Water Transfer Project to Beijing, expand the channels for transferring water to Beijing, and improve the water resources carrying capacity of the capital; Continue to promote the construction of supporting water plants and gradually realize the water supply in Shuang Yuan, and accelerate the improvement of the water supply system in the central city; Gradually build a second water conveyance loop along the Sixth Ring Road. After the completion of the third phase of the project, it will effectively improve the water supply security in key areas such as Beijing city sub-center and new airport, as well as new cities such as Fangshan, Daxing and Mentougou. By 2020, the city's annual utilization of external water transfer capacity will reach 654.38+0.5 billion cubic meters, an increase of nearly 50% over the current situation.