Three Gorges Project

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Problem description:

Three Gorges project?

Analysis:

The Yangtze River starts from Tuotuo River on the Qinghai-Tibet Plateau, the roof of the world, ends in Shanghai and flows into the East China Sea.

The total length is more than 6,300 kilometers, and the annual inflow into the sea is nearly 1 000 billion cubic meters, with a total drop of more than 5,800.

The reserves of rice and hydropower resources are 268 million kilowatts. However, since the founding of New China,

The comprehensive management and development of the Yangtze River has launched a large-scale investigation, planning and scientific research.

And demonstration work. After comprehensive planning and repeated argumentation, it is considered that the Three Gorges Project is comprehensive.

Key projects for harnessing and developing the Yangtze River. The Yangtze River is nearly 200 kilometers from Fengjie to Yichang.

The Yangtze River passes through three Gorges, namely Qutang Gorge, Wuxia Gorge and Xiling Gorge. The Three Gorges of the Yangtze River is

The three parts of the Grand Canyon. Located in the middle of Xiling Gorge, Yichang City, Hubei Province, three

Douping (38km downstream of Gezhouba Water Control Project) has an open valley and granite rocks.

The foundation is hard and complete, which can control the upstream basin area of 6.5438+0 million square kilometers, which has been flat for many years.

The average runoff is nearly 500 billion cubic meters. After decades of arduous investigation, planning and demonstration

After examination and approval, the Three Gorges Project, which attracted worldwide attention, was specially located in Sandouping.

Baozhong Island (dam site of the Three Gorges Dam) of the Yangtze River Three Gorges Water Control Project

The Three Gorges Project of the Yangtze River adopts "one-level development, one-time completion, staged water storage and continuous operation".

Immigration "plan. The dam is a concrete gravity dam, with a total length of 3035 meters and a crest elevation.

185m, normal water level175m, total storage capacity of 39.3 billion cubic meters, including flood control reservoirs.

The capacity is 2.210.50 billion cubic meters. 2460 cubic meters of sand are discharged per second, and sand discharge holes are dotted.

Placed on the section of concrete gravity dam and the bottom of power station. The flood discharge capacity of the flood discharge dam section per second is 1 10000.

KW, with an average annual power generation of 84.9 billion kWh. Navigation structure on the left bank can transmit energy in one direction every year.

Force 50 million tons. Double-line five-class ship lock, which can pass through a fleet of 10,000 tons; Single-line principal perpendicular

The ship lift can quickly pass through 3000-ton passenger and cargo ships.

The earth and stone excavation of the main project is about/kloc-0.02 million cubic meters, and the earth and stone filling is about 29.3 million cubic meters.

10,000 cubic meters, concrete pouring is about 27 1.5 million cubic meters, and metal structure installation is about 28. 1 ton.

. The preparation period is 2 years. The total construction period of the main project is 15, and the permanent navigation will be started in the ninth year.

The building and the first batch of units generate electricity. The reservoir finally flooded 4310.3 million mu of cultivated land; most

Finally,113180,000 people were relocated. According to the price level of 1993, the static total investment is 954.6.

100 million yuan, including 50.09 billion yuan for hub projects; Resettlement of 300.7 yuan; Transmission electrician

Cheng 65.438+05.3 billion yuan. The main technical and economic indicators of the project are shown in the attached table.

After the completion of the Three Gorges Project, it will play a role in flood control, power generation, shipping, aquaculture and tourism.

Tourism, ecological protection, environmental purification, development and resettlement, South-to-North Water Transfer Project, water supply and irrigation, etc.

The top ten benefits are incomparable to any giant power station in the world!