What is the main purpose and use of building the Three Gorges of the Yangtze River?

Main purpose: The construction of the Three Gorges of the Yangtze River is to protect the middle and lower reaches of the Yangtze River from flood disasters to a large extent. Of course, it also has the following functions:

1. Flood control function

The flood control storage capacity reserved for the operation of the Three Gorges Reservoir is 22.15 billion cubic meters. The reservoir flood regulation can reduce the peak flow of 27,000 cubic meters. -33,000 cubic meters per second, the highest among water conservancy projects in the world.

2. Shipping role

The backwater of the Three Gorges Reservoir to Chongqing, an important town in the southwest, will improve the shipping mileage by 660 kilometers and increase the annual one-way navigation capacity from 10 million tons to 50 million tons. . The Three Gorges Project is rightly called the first major hub project that has significantly improved shipping conditions in the world.

3. Drought-resistance function

In the event of severe drought downstream, the Three Gorges can increase water release intensity and increase the discharge flow, so that the drought-resistance situation can be effectively alleviated. The water replenishment function is to take into account the water for residents and production on both sides of the downstream bank, but now it seems that it also needs to meet the needs of drought relief. This part of the water demand is relatively large.

4. Power generation function

The Three Gorges Power Station has installed 32 700,000-kilowatt hydro-generator units and 2 50,000-kilowatt hydro-generator units, with a total installed capacity of 22.5 million kilowatts and annual power generation. With a capacity of over 100 billion kilowatt-hours, it is the hydropower station with the largest installed capacity in the world.

The Three Gorges hydropower development is an important milestone in China's sustainable development, especially the development of clean energy. As of the end of 2012, the cumulative power generation of the Three Gorges Project was 629.1 billion kilowatt-hours.

Extended information:

On April 3, 1992, the Fifth Session of the Seventh National People's Congress voted 1,767 votes in favor, 171 votes against, 664 abstentions, and 25 people did not press the voting machine. , nearly one-third of the people opposed or abstained from voting, and the "Resolution on the Three Gorges Project of the Yangtze River" was passed.

After the construction of the Three Gorges Hydropower Station was approved by the National People's Congress of China, construction officially started in 1994. Water storage and power generation began on the afternoon of June 1, 2003, and it was completed in 2009.

The Three Gorges Hydropower Station is the Three Gorges Water Conservancy Project on the Yangtze River, also known as the Three Gorges Project. The Xiling Gorge section of the Yangtze River in Yichang City, Hubei Province, China, and the Gezhouba Hydropower Station downstream form a cascade power station.

The Three Gorges Hydropower Station is the largest hydropower station in the world and the largest engineering project ever constructed in China. The many issues such as immigration and environment caused by it have always been accompanied by huge controversies.

Reference: Baidu Encyclopedia-Three Gorges Dam