兴隆水利枢纽上下游河道下切侵蚀研究

Research on Downstream River Erosion of Xinglong Water Control Project

兴隆水利枢纽建成后,受到河道下切侵蚀影响严重。河道下切侵蚀使河床高程降低,同大流量下水位降低,下游河床遭受冲刷,枯水期加剧干旱。通过对汉江皇庄-仙桃河段水文数据和兴隆水利枢纽上下游河道断面测量数据进行数值分析,了解河流下切侵蚀状况,并对其形成原因和发展趋势进行研究,计算出近年来河道下切侵蚀深度,并对下切趋势进行分析研判。

After the completion of the Xinglong Water Conservancy Project,it has been severely affected by the erosion caused by the river channel.The erosion caused by river cutting reduces the elevation of the riverbed,lowers the water level under the same large flow rate,and causes erosion of the downstream riverbed,exacerbating drought during the dry season.This article conducts numerical analysis on the hydrological data of the Huangzhuang Xiantao section of the Han River and the measurement data of the upstream and downstream river sections of the Xinglong Water Conservancy Hub,reflecting the erosion status of the river’s downward cutting,and studying its formation reasons and development trends.The depth of downward cutting erosion in the river in recent years is calculated,and the downward cutting trend is analyzed and judged.