上荆江分汊性微弯河段河床演变原因探讨  

Analysis of river channel process of bifurcated and slightly curving channel in Upper Jingjiang River

作　　者：江凌 李义天[2] 曾庆云 何碧 

机构地区：[1]长江航道规划设计研究院,湖北武汉430011 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430027

出　　处：《泥沙研究》2010年第6期73-80,共8页Journal of Sediment Research

基　　金：国家973项目(2003CB415200)资助

摘　　要：受河岸组成、人工护岸工程的控制,上荆江河道平面外形基本稳定,但分汊性微弯河段河势调整较为剧烈,影响航道条件。本文基于不同河段的河床平面形态、水沙输移特性、河床演变规律的对比分析,认识到水沙输移特性既与河床平面形态密切相关,又直接影响河床演变对水沙条件的响应模式;基于此观点,对三峡工程蓄水以来上荆江分汊性微弯河段的演变特性进行了分析,进而预测分析了三峡正常蓄水后的河床演变趋势,可供航道治理参考。Under the control of natural nodes and bank protection works,the plan-form of the Upper Jingjiang River is basically stable,but the local river regime in the bifurcated and slightly curving channel adjusts largely,impacting on channel navigation conditions.Aiming at this kind of river reaches,this paper comparatively analyzes their riverbed plan-forms,channel evolution laws and water and sediment transport characteristics.The water and sediment transport characteristics are closely related to the riverbed plan-form,and directly impact on the model of riverbed evolution in response to water and sediment conditions.Based on this view,the riverbed evolution of the bifurcated and slightly curving channels in the Upper Jingjiang River since the commissioning of the Three Gorges Project is analyzed,moreover,their evolution trend after the Three Gorges Project normal impoundment is forecasted to guide channel navigation regulation.

关 键 词：上荆江 河段 河床演变 原因探讨 Upper river channel 输移特性 平面形态 三峡工程蓄水 预测分析 直接影响 演变特性 演变趋势 演变规律 响应模式 水沙条件 护岸工程 河势调整 河岸组成 航道治理 

分 类 号：TV14[水利工程—水力学及河流动力学]