Why is the overall layout of the South-to-North Water Transfer Project determined?

The overall layout of the South-to-North Water Transfer Project is determined as follows:

Transfer water from the upper, middle and lower reaches of the Yangtze River to meet the development needs of North China and other places, namely, the west route project of South-to-North Water Transfer, the middle route project of South-to-North Water Transfer and the east route project of South-to-North Water Transfer.

The South-to-North Water Diversion Project is a strategic project of China people.

Divided into east, middle and west lines. The starting point of the East Line Project is located in Jiangdu Water Control Project, Yangzhou City, Jiangsu Province. The starting point of the mid-line project is Danjiangkou Reservoir in the middle and upper reaches of the Han River, and the water supply areas are Henan, Hebei, Beijing and Tianjin.

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.