Miyun Reservoir Dam in Beijing

66 meters, the dam crest is 960 meters long.

Bottom =

390 meters

Baihe main dam1started in September 1958 and was completed in September 1960. The dam type is an earth dam with rolled clayey inclined wall, the maximum dam height is 66.4m, the dam crest length is 960.2m, the dam crest elevation is160.0m, the dam crest width is 8m, and the maximum dam bottom width is 390m ... Because of the high permeability of the dam foundation overburden, the maximum thickness is 44m, and the dam foundation overburden adopts the combination of loam trough, clay cement grouting curtain and concrete cutoff wall. 1On July 28th, 976, a strong earthquake of magnitude 7.8 occurred in Tangshan, which affected Miyun Reservoir and the protective layer of the upper reaches of Baihe main dam slipped. After the earthquake, the Baihe main dam was strengthened and the inclined wall was thickened.

The reservoir area is 1.88 square kilometers, the perennial water surface area is 9 1.33 million square meters, and the maximum water storage area is 285 square kilometers. The storage capacity is 4.375 billion cubic meters. With a depth of 40-60 meters, it is the largest reservoir in North China, and it controls the floods in the upper reaches of Chaohe River and Baihe River with 15788 square kilometers.

It is divided into three reservoir areas: Baihe, Chaohe and Neihu, and the Neihu reservoir area has Kuxin Island. There are two main dams: Baihe main dam (66 meters high and 960 meters long at the top) and Chaohe main dam; There are 5 auxiliary dams, 3 spillways, 6 water tunnels, 2 power stations and 1 regulating pond, namely, Beibaiyan, Zoumazhuang, Xishi Camel, Heather Camel and Jiusongshan. Baihe main dam.

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