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亭下水库位于奉化江支流剡溪上,在奉化县溪口镇上游约5km处。坝址以上集雨面积176km~2,总库容1.50亿m~3。是一座以防洪、灌溉为主,结合发电、供水等综合利用的大型水库。直接防洪面积10万亩,间接防洪面积40万亩;补充奉化、鄞县、镇海三县区67.4万亩农田灌溉和城市用水;电站装机4000kw,年发电量1122万kw·h。工程由以下建筑物组成: 拦河大坝:坝型为混凝土重力坝,属二级建筑物。最大坝高76.5m,坝长317m,坝体混凝土52万m~3。坝内设有灌浆、排水、观测、检查、交通等各种不同用途的廊道,并埋设有
Pavilion under the reservoir is located in Fenghua River Tributary River, in Fenghua County upstream about 5km Xikou. Rainfall above the dam site is 176km ~ 2 with a total storage capacity of 150 million m ~ 3. Is a flood control, irrigation, combined with power generation, water supply and other comprehensive utilization of large reservoirs. Direct flood control area of 100,000 mu and indirect flood control area of 400,000 mu. It supplemented the irrigation and urban water supply of 674,000 mu in Fenghua, Yinxian and Zhenhai counties and counties. The installed capacity of power plants was 4000 kw and the annual generating capacity was 11.22 million kw · h. The project is made up of the following buildings: Barrage Dam: The dam type is a concrete gravity dam, which belongs to the secondary structure. The maximum dam height is 76.5m, the dam length is 317m, and the dam concrete is 520,000m ~ 3. Dam with grouting, drainage, observation, inspection, transportation and other corridors for different purposes, and buried with