太湖流域苏南沿长江的水闸是太湖流域与长江水量交往的咽喉。流域防洪除涝、工农业用水、航运、水资源保护等方面都需要通过这些水闸来进行水量调节。汛期平原抒区需通过沿江水闸向长江排出洪涝水,既可减少了入太湖洪水量;也改善了本地区排水条件。一旦发生特殊干旱年(例如1978年和1981年)需要通过这些水闸从长江引 The sluice along the Yangtze River in the south of the Taihu Lake basin is the throat of the water exchanges between the Taihu Lake basin and the Yangtze River. Watershed flood control and waterlogging, industrial and agricultural water, shipping, water resources protection and other aspects need to be carried out through these sluices water regulation. The flood plains in the flood season need to discharge flood water to the Yangtze River through the sluices along the river, which can reduce the flooding into the Taihu Lake and also improve the drainage conditions in this area. In the special dry years (for example, 1978 and 1981), it is necessary to pass these sluices from the Yangtze River