三峡水库变动回水区泥沙问题研究  

Study on sedimentaton within fluctuation backwater area of Three Gorges Reservoir

作　　者：金中武[1] 范北林[1] 徐海涛[1] 

机构地区：[1]长江科学院河流研究所,湖北武汉430010

出　　处：《水利水电技术》2009年第5期14-18,共5页Water Resources and Hydropower Engineering

基　　金："十一五"国家科技支撑项目(2006BAB05B02)

摘　　要：通过分析三峡水库运用前后的入库水沙特点和变动回水区泥沙冲淤变化规律后认为:建库前该河段年际间河床冲淤基本平衡。三峡水库运用5年来,入库沙量比建库前有较大的减少;该河段总体淤积,主要淤积在边滩,深槽淤积较少甚至有冲刷,土脑子河段发生河型转化;由于长江上游水库拦沙的作用,变动回水区河段的泥沙淤积速率会比原来预计的要小。Based on the analysis of the features of both the inflowing water and sediment and the de-silting law within the fluctuation backwater area before and after the operation of Three Gorges Reservoir, it is concluded that the bed de-siltation of the river reach among years before the reservoir construction is basically equilibrated. However, the inflowing sediment is larger that before the reservoir construction five years since the operation of Three Gorges Reservoir, and then the river reach is gener- ally silted, while the main siltation is along the shoal with less deep trough siltation, and even some scouring is therein. Furthermore, the river pattern of Tunaozi River Reach is transformed. As a result of the effect of silt detention from the upstream reservoir concerned, the sedimentation rate of the reach of the fluctuation backwater area can be less than that of the originally predicted.

关 键 词：三峡库区 变动回水区 泥沙 冲淤规律 

分 类 号：TV145.1[水利工程—水力学及河流动力学] TV263