Brief introduction of Three Gorges Dam

The Three Gorges Project consists of dams and flood discharge structures, hydropower stations and navigation structure. The river dam is a concrete gravity dam, and the flood discharge dam section is arranged in the middle of the river bed. After completion, the water level will rise by 100 m, and the high gorge will exit Pinghu. According to the overall design, the dam started in February 1994 14, and was closed in mid-October 1997 165438. The project will be completed in 2 1 12 years, with a total construction period of 18 years. The project investment is 90.09 billion yuan. The height of the dam crest is185m, and the dam length is more than 2,300m. The initial operating water level is165m (2006) and the final operating water level is175m (2009). When the water level rose to 135 meters above sea level in 2003, a two-way five-stage lock was adopted. The reservoir area is 1.084 square kilometers, with a total storage capacity of 39.3 billion cubic meters and a flood control storage capacity of 221.500 million cubic meters. The total installed capacity of hydropower is 65.438+07.68 million kilowatts, and the annual power generation is 84 billion kWh. In 2006, the first batch of units will generate electricity.