三峡、丹江口水库运行前后坝下游不同河型稳定性对比分析  

Comparative analysis of river bed stability of different river patterns below reserviors before and after commissioning of Three Gorges Project and Danjiangkou Project

作　　者：姚仕明[1,2] 黄莉[1,2] 卢金友[1,2] 

机构地区：[1]长江水利委员会长江科学院,湖北武汉430010 [2]水利部江湖治理与防洪重点实验室,湖北武汉430010

出　　处：《泥沙研究》2012年第3期41-45,共5页Journal of Sediment Research

基　　金：水利部公益性行业专项"大型水利枢纽工程下游河型变化机理研究(2007SHZ1-3)"

摘　　要：通过计算丹江口、三峡水库运用前后坝下游不同河型的河床稳定系数,分析了建库前后坝下游河床稳定性的变化情况及不同河型稳定性的差异,结果表明:坝下游不同河型的综合稳定系数表现为,分汊河型的稳定系数最大,蜿蜒河型次之,游荡河型综合稳定系数最小;同一河型在不同的河流甚至同一河流不同河段上的综合稳定系数存在差异;丹江口、三峡水库运用以后坝下游不同河型的综合稳定系数均呈增大趋势,河道总体呈现渐趋稳定的态势。By calculating the coefficients of river bed stability in channels below reserviors before and after commissioning of the Three Gorges Project and the Danjiangkou Project, the change of the river bed stability and the differences of the river bed stability of the different river patterns are analyzed in this paper. The re- suits show that the integrated coefficients of river bed stability of different river patterns are different ; in gener- al, the stable coefficient of the braided river pattern is the biggest, followed by the meandering river pattern, and the wandering river pattern is the smallest. The integrated stable coefficients of the same river pattern in different rivers or even in different reaches in the same river are different. The river bed stability of channels below reserviors shows an increasing trend after commissioning of the Three Gorges Project and the Danjiangk- ou Project, and the river channel is gradually stablilized as a whole.

关 键 词：河床稳定性 河型 三峡水库 丹江口水库 坝下游 

分 类 号：TV145[水利工程—水力学及河流动力学]