How to pronounce the pinyin of Ba?

Dam refers to the water retaining structure that intercepts the water flow in the river to raise the water level or adjust the flow. It can form reservoirs, raise water levels, regulate runoff and concentrate water heads, and can be used for flood control, water supply, irrigation, hydropower generation and improvement of navigation. River training structure, which adjusts the river regime and protects the riverbed, is also called a dam, such as groins, shun dams and submerged dams.

History:

The earliest dam recorded in history is the KeSaihi dry masonry dam built by the Egyptians on the Nile in 2900 BC, with a height of15m. From 598 BC to 59 BC1year, China built a dam in the south of Shouxian County, Anhui Province, forming a reservoir with less skin irrigation. In the late19th century, the dam was built with concrete.

/kloc-before the middle of the 0/9th century, people mostly built dams by experience; Important progress was made in the stability and stress analysis of dam engineering design in the 65438+1950s, which gradually provided a scientific basis for the design of gravity dams, and made important progress in the 1930s. The application of arch dam and earth dam design theory began in the middle of19th century and the first half of 20th century, and has been continuously improved.

By 1992, the highest earth-rock dam in the world was the Nurek dam built by the Soviet Union (now Tajikistan) in 1980, with the highest dam height of 300 meters. The maximum height of the Luogong Dam under construction in Tajikistan is 335 meters. The highest gravity dam is the Swiss Grand Dickens Dam, which was built in 1962. The highest dam is 285 meters high.

The highest arch dam is the Inguri Dam built by the Soviet Union (now Georgia) at 1980, with the highest dam height of 271.5m. to 1992. The highest earth-rock dam in China is Zengwen Dam in Taiwan Province Province, with the highest dam height of133m. The highest gravity dam is Wujiangdu Hydropower Station in Guizhou Province, with the highest dam height165m. The highest arch dam is Deji Dam in Taiwan Province Province, with the highest dam height of181m.