五甲渡裁弯工程是显著提高曹娥江中、下游河道行洪能力的防洪工程,也是浙江省迄今最大的河道裁弯工程。在简述五甲渡裁弯工程与曹娥江中、下游水文及河床演变主要特性的基础上,分析了该裁弯工程显著的防洪效益、节省标准塘建设巨大投资费用等的经济效益,并对由于裁弯使河道长度缩短而造成咸水上朔距离有所增加等负面的影响进行了介绍。 Wujiaoduanduan bend project is to significantly improve Cao’e River middle and lower reaches of the river flood capacity flood control project, but also in Zhejiang Province to date the largest river cutting project. On the basis of a brief description of the key features of the Wujiaduan Curved Bend Project and the evolution of the middle and lower reaches of the Cao’e River in the lower and middle reaches of the Yangtze River, the economic benefits of significant flood control benefits and significant investment costs in the construction of a standard pond are analyzed. The negative effects of the shortening of the river course caused by the cutting of the river and the increase of the distance between the saltwater and the new moon were introduced.