杜家台分洪闸位于汉江下游右岸仙桃镇(现沔阳县址)的下首不远。闸身30孔进水净宽363公尺,最大进洪流量为4,000秒公方,在特殊情况下,可采取过5,300秒公方。水流进入闸以后,由长21公里、宽约800公尺的分洪道引入泛区(泛区原为东荆河尾闾及长江倒灌地区)。泛区面积约为660平方公里,在沌口及大军山一带与长江连通。杜家台分洪工程为基本上解决汉江“三年两遇”洪水的工程设施。当上游洪水来量较大而非下游河道所能宣泄时,它可以分泄一部分洪水经泛区徐入长江,适当地控制杜家台以下汉江干流的安全流 Dujiatai flood diversion gate is located in the lower reaches of the lower reaches of the Han River downstream of Xiantao town (now Mianyang County). Gate 30 holes net water inlet width of 363 meters, the maximum amount of flood into the public 4,000 seconds, under special circumstances, can take over 5,300 seconds. After the water flow into the gate, the flood diversion channel 21km long and 800m wide is introduced into the pan-flooded area (formerly the east Jinghe River tailrace and the Yangtze River intrusion area). Pan-area area of ​​about 660 square kilometers, in Zhuankou and Dajun Mountain area connected with the Yangtze River. Dujiatai Flood Diversion Project basically solves the engineering facilities of the flood in the “three years in a row” in the Han River. When the amount of flood in the upper reaches is larger than that in the lower reaches of the river, it can divert some of the floodwater into the Yangtze River through the floodplain and control the flow of the Hanjiang River main stream below Dujiatai properly