一、概况大治河东水闸位于我县老港镇东,1979年建成,6孔×10m 加鱼游道一孔2m 共7孔(含通航孔),计净宽62m,集并上海、南汇二县水量排泄入东海,起到了挡潮御卤、防洪排涝,同时承担市区黄浦江高潮削峰纳潮任务,是一座中型排涝、挡潮闸。闸外于1993年8月开挖了一条底宽5m,二坡1:2,吴淞零上1.5m 底高的排水漕全长1km,含排水河与闸下结构段全长1853m,现状总长2.453km,1993年9月16 I. Introduction Dazhi Hedong Water Gate is located in the east of Laogang Town in our county and was built in 1979. There are 7 holes (including navigable hole) in 2 holes of 6 holes × 10m plus fish trail, accounting for 62m net width and set in Shanghai and Nanhui counties Water discharge into the East China Sea, played a tide embankment, flood control and drainage, at the same time undertake the peak Huangpu River climax task, is a medium drain, tidal barrier. The gate was excavated in August 1993 a bottom width of 5m, two slopes 1: 2, Wusong 1.5m bottom height of the drainage channel length of 1km, with drains and gates under the structure of a total length of 1853m, the current total length of 2.453 km, September 1993