Where does the water flow downstream of the Three Gorges Reservoir go?

The lower reaches of the Three Gorges Reservoir are the middle and lower reaches of the Yangtze River, which finally flows into the East China Sea. The Three Gorges Reservoir is located in Yichang, Hubei Province, with the upper reaches of the Yangtze River above Yichang and the middle and lower reaches below Yichang.

The total area of the Three Gorges Reservoir is 1.084 square kilometers, and the flooded land area is 632 square kilometers, covering 2/kloc-0 county-level administrative districts in Hubei Province and Chongqing City. The project consists of dams and reservoirs, power stations and navigation structure.

Under the characteristics of existing reservoirs, the potential of Three Gorges Reservoir to solve the problem of drought and water shortage in the middle and lower reaches lies in how to allocate the storage capacity of 6-7 months165 billion cubic meters. If the emissions are balanced, it can increase by 1660-2390 cubic meters per second. If the discharge is increased within a certain period of time, the water flow conditions in the middle and lower reaches can be obviously improved, but the normal power generation plan needs to be changed, which may affect the guarantee rate of power generation and shipping in the reservoir.

Extended data

The Three Gorges Project on the Yangtze River is the largest water conservancy control project under construction in the world today. The Three Gorges Project adopts the construction scheme of "one-level development, one-time completion, water storage by stages and continuous resettlement". According to the price of 1993 at the end of May, the static investment of the Three Gorges Project is 90.09 billion yuan, including 50.09 billion yuan for the hub project and 40 billion yuan for resettlement.

The drought-resistant dispatching capacity of the reservoir mainly depends on the increased flow in the dry season, that is, considering the storage capacity of the upstream Three Gorges Reservoir of 7.4-6.5438+0.89 billion cubic meters, the average output in the dry season is 4.99-5.3 million kilowatts; In dry season, the average flow of the middle and lower reaches can be increased by 1660m3/s, and in dry season, the average flow can be increased by 2390m3/s ... These increased flows are limited by the operation of the upstream reservoir, the operating water level of the Three Gorges Reservoir in dry season and the operation and dispatch of the power grid, so it is impossible to ensure a large discharge increase in a short time.

Baidu Encyclopedia-Three Gorges Reservoir