小浪底水库库区支流拦门沙形成的主因分析  

Key factors influencing evolution of sand bars in tributaries of the Xiaolangdi Reservoir

作　　者：王远见[1,2] 谢蔚[3] 王婷[1] 蒋思奇[1] 

机构地区：[1]黄河水利科学研究院黄河小浪底研究中心,河南郑州450000 [2]清华大学水利水电工程系,北京100084 [3]黄河水利水电开发总公司水工部,河南郑州450000

出　　处：《泥沙研究》2016年第6期51-58,共8页Journal of Sediment Research

基　　金：国家自然基金面上项目(51179072);国家自然基金青年项目(51509102;51509100)

摘　　要：采用多元回归分析方法,运用无量纲化物理量建立小浪底库区支流每年汛期拦门沙高度、支流淤积量与水沙过程、干支流地形条件、局部输沙流态之间的多元响应关系,指出出库流量、含沙量、干支流地形条件、床沙粒径、库区淤积形态均是影响拦门沙形成的重要因素。敏感性分析结果表明:小浪底水库的出库流量和库区淤积形态是影响拦门沙形成的两个最重要因素。这一研究成果为小浪底水库库区拦门沙工程处置方案提供了理论依据。Multiple regression analysis of dimensionless parameters is applied in this paper to establish a re- sponse relationship between the increment height of the sand bars in the tributaries of the Xiaolangdi Reser- voir. A number of influencing factors are used in this study, as water and sediment conditions,terrain factors in the main channel and tributaries and local flow regimes and so on. The similar relationship between sediment deposition quantity in the tributaries and the influencing factors are obtained. Results show that the water and sediment conditions, terrain factors,local flow regimes, grain size of bedload are all impact factors to the evolu- tion of sand bars. By sensitive analysis, the key factors for the evolution of the sand bars are flow discharge and local flow regimes. Those results would be useful for the engineering projects to control the evolution of the sand bar in the tributaries of the Xiaolangdi Reservoir.

关 键 词：小浪底水库 拦门沙 多元回归分析 敏感性分析 

分 类 号：TV145.1[水利工程—水力学及河流动力学]