上游建库对三峡水库变动回水区航道的影响  

Influence of reservoir construction upstream on the navigation channel in the fluctuating backwater area of the Three Gorges Reservoir

作　　者：李义天[1] 陈建[2] 邓金运[1] 甘富万[1] 谢葆玲[1] 

机构地区：[1]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430072 [2]华北水利水电学院,河南郑州450011

出　　处：《泥沙研究》2008年第5期31-37,共7页Journal of Sediment Research

基　　金：国家重点基础研究资助项目(2003CB415200)

摘　　要：在分析上游建库对三峡水库枯水期保证水位回水末端的影响的基础上,对比分析了三峡蓄水后上游无库和上游建库情况下重庆河段的淤积发展、分布及其对航道的影响,结果表明:随着水库运用初期河势调整或者炸礁措施的投入及枯期消落水位155m回水末端的上延,重庆河段是变动回水区碍航的重点区域;干流上游水库的联合作用下,重庆河段干流河段将明显冲刷,原有的淤积位置淤积量及淤积厚度明显减小,甚至出现冲刷,重庆河段干流航道得到明显改善,嘉陵江入汇口处的金沙碛河段受干流上游建库的影响较小,碍航状况和上游无库情况下基本一致。Through analyzing the sedimentation process and distribution in Chongqing reach with/without reservoir construction upstream, the influence of reservoir construction upstream on the water level and the navigation channel in the fluctuating backwater area of the Three Gorges Reservoir are studied. The results show that the Chongqing reach will become the main obstructive shipping area with the regulation works and the headwater extension of backwater at operation level 155m. Under the function of the upper reservoirs, the deposition in main stem Chongqing reach will greatly decrease, even erosion could be observed, which will help a lot to improve the navigation channel. However, building reservoir upstream has a little influence on the navigation condition in Jinshaqi reach .

关 键 词：上游建库 变动回水区 冲淤变化 航道 

分 类 号：U617[交通运输工程—船舶及航道工程]