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小井沟水利工程是“十二五”期间四川省重点大(2)型水利项目,也是西部大开发重点水利工程。工程坝址位于荣县境内岷江支流越溪河上游,小井沟峡谷,距自贡市约84km,距荣县县城约40km。工程控制流域面积587.4km~2(占全流域面积22%),多年平均径流量2.7亿m~3。工程总工期43个月。工程由大坝枢纽、输水工程两部分组成。水库正常蓄水位429m,总库容1.66亿m~3,兴利库容1.11亿m~3。大坝枢纽包括钢筋砼面板堆石坝(坝高87.6m、坝长255m)、开敞式溢洪道(宽10m)、泄洪放空洞(6.5×8.3m)、取水洞(洞径2m)、副坝
Small well ditch water conservancy project is “Twelve-Five ” during the key large (2) type of water conservancy project in Sichuan Province, is also the western development of key water conservancy projects. The dam site is located in the upper Triassic tributary of Rong River in the upstream of Xiaoxi Valley, about 84km from Zigong City and about 40km from Rongxian County. The project control basin covers an area of 587.4km ~ 2 (accounting for 22% of the total drainage area) with a mean annual runoff of 270 million m3. The total construction period of 43 months. The project is composed of dam junction and water conveyance project. The normal storage level of the reservoir is 429m, with a total storage capacity of 166 million m ~ 3 and a profit of 111 million m ~ 3. The dam project consists of reinforced concrete face rockfill dam (87.6m high dam, 255m long dam), open spillway (10m wide), flood releasing hole (6.5x8.3m), water intake hole (2m)