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水闸是一种具有档水和放水双重作用的水工建筑物．排水闸的作用是排除堤内坡水和阻挡堤外洪水。它是防洪、排涝的重要工程设施。如果闸门漏水，就不能起到抽水防洪的作用．反而会造成灾害。1993年黑龙江省纳河市水利技术人员在嫩江堤防百露段．修了一在排水闸（一孔150×100cm2
Sluice is a hydraulic structure that has the dual role of stalls and water. The function of the drainage gate is to exclude the water inside the embankment and to block the flood outside the embankment. It is flood control, drainage of important engineering facilities. If the gate leakage, it can not play the role of flood control. It will cause disaster instead. In 1993, Heilongjiang Province, Nal River water conservancy technicians in the Nenjiang embankment hundred sections. Repair a drainage gate (a hole 150 × 100cm2