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一、概况黄坑水陂是1966年开工兴建的引水灌溉工程。枢纽座落在黄坑公社的大坪大队,引遂川江左溪河支流大沙水。拦河坝以上集雨面积为154平方公里,水量充沛。设计引用流量1.5秒立米,灌溉二个公社十一个大队8600亩农田。干渠总长32公里,坡降为四千分之一。干渠占70％以上地段均沿山开挖,山高坡陡,一般均在45°左右;土质差,表层为强风化的花岗岩风化土。1976年,渠首引进1.2秒立米的水,渠内所有泄水涵闸关闭,流过15公里后,水量全部消失,平均每公里下渗流量达0.08秒立米。因此,无法投入运行。自1978年到1981
First, the general situation Huangkeng Minamata was started in 1966 to start the construction of irrigation projects. The hub is located in Daping Brigade, Huangkeng commune, leading to the tributary of the left stream of the Chuan River Dasha. Above the dam collection rain area of 154 square kilometers, with plenty of water. The design cites flow of 1.5 seconds and irrigates 8600 acres of farmland in eleven brigades of two communes. The total length of 32 km main canal, down to one-fourth of the slope. More than 70% of the main canal sections are excavated along the mountain. The steep slopes of hills and valleys are generally around 45 °. The soil is poor and the surface is heavily weathered granite weathered soil. In 1976, the canals introduced water of 1.2 seconds of cubic meters, and all drainage culverts and gates closed in the canal. After 15 kilometers of water flow, all the water had disappeared and the average seepage flow per kilometer reached 0.08 seconds. Therefore, it can not be put into operation. From 1978 to 1981