三峡水库蓄水后长江中游嘉鱼河段河床演变特性分析  

Analysis of riverbed evolution characteristics of Jiayu Reach in middle reaches of Yangtze River after impoundment of Three Gorges Reservoir

作　　者：朱子园 陈静 毛武蓉 ZHU Ziyuan;CHEN Jing;MAO Wurong(Bureau of Hydrology,Changjiang Water Resources Commission,Wuhan 430010,China;Middle Changjiang River Bureau of Hydrology and Water Resources Survey,Bureau of Hydrology of Changjiang Water Resources Commission,Wuhan 430010,China)

机构地区：[1]长江水利委员会水文局,湖北武汉430010 [2]长江水利委员会水文局长江中游水文水资源勘测局,湖北武汉430010

出　　处：《水利水电快报》2024年第7期24-28,45,共6页Express Water Resources & Hydropower Information

摘　　要：嘉鱼河段是长江中游典型的碍航河段之一,需重点关注河床演变特性。根据1970~2021年实测水下地形资料,全面分析了该河段的冲淤、岸线、河床形态、洲滩深槽等变化,研究该河段自2003年三峡水库蓄水运用及2006年实施航道整治工程以来河床演变特性。结果表明:自三峡水库蓄水运用以来,该河段岸线基本稳定,河床冲刷部位主要在枯水河槽;近些年断面形态逐渐趋于稳定,岸线变化不大;河段内洲滩平面位置保持相对稳定的状态,仅在复兴洲尾部左缘、燕窝镇对面江中形成了一个新的江心洲;深槽平面位置较为稳定。研究成果可为该河段防洪调度、河道治理等提供参考。Jiayu Reach is one of the typical navigation obstacles in the middle reaches of Yangtze River,so the riverbed evolution characteristics of it should be focused.In order to study the changes of scouring and silting,shoreline,riverbed morphology and shoal deep groove in the reach since the operation of the Three Gorges Reservoir in 2003 and Channel Regulation Project in 2006,based on data of underwater topography from 1970 to 2021,the characteristics of recent riverbed evolution were comprehensively analyzed.The results showed that since the operation of Three Gorges Reservoir,the shoreline of this reach was basically stable,and the erosion was mainly in dry channels.In recent years,the cross section had gradually became stable,and the shoreline didn’t change much.The horizontal position of the bars in this reach remained stable,and a new sandbar was formed at left edge of the tail of Fuxingzhou sandbar,opposite to Yanwo Town.The plane position of the deep groove was stable.The results can provide a reference for flood control regulation and river regulation of Jiayu reach.

关 键 词：河床演变 冲淤变化 水沙条件 长江中游 三峡水库 嘉鱼河段 

分 类 号：TV147[水利工程—水力学及河流动力学]