黄河中下游推移质泥沙输移特性研究  

Study on Transport Characteristics of Bed Load in the Middle and Lower Yellow River

作　　者：刘明潇[1] 孙东坡[1] 高磊[2] 吕圆芳[3] 

机构地区：[1]华北水利水电大学水力学及河流研究所,河南郑州450011 [2]水利部综合事业局,北京10053 [3]陇东学院,甘肃庆阳745000

出　　处：《人民黄河》2013年第12期24-26,共3页Yellow River

基　　金：国家自然科学基金资助项目(51039004;51079055)

摘　　要：利用量纲分析原理讨论了黄河中下游河道各种水力要素及边界条件对推移质输沙率的影响,建立了反映河床形态因子的综合无量纲水流强度指标,同时分析了各水流强度指标与推移质泥沙输移强度的相关关系。结果表明:无量纲综合水流切应力指标和无量纲综合水流功率指标均与推移质泥沙输移强度有较好的相关性;在水流强度很低、无量纲水流功率综合指标W*2<600时,水流功率综合指标与推移质输移强度的关联度有一定的波动性;随着水流强度增大,无量纲水流功率综合指标600<W*2<7 000时,水流功率综合指标与推移质输移强度有着较好的关联度。Based on dimensional analysis principle, the influence on the bed load transport rate had been discussed by several hydraulic elements and boundary conditions. The dimensionless comprehensive flow intensity index, reflecting river bed form factor, had been established, and rela- tionship between flow intensity and bed load transport intensity had been analyzed. Analysis shows that both dimensionless comprehensive flow shear stress index and flow power index have a better correlation with the dimensionless bed load transport intensity. When the flow strength is low, di- mensionless composite flow power index W1＊ 〈 600, the relevance between flow power index and bed load transport intensity have some fluctuating. When the flow strength is increase, dimensionless composite flow power index 600 〈 Wm＊ 〈 7 000, the relevance between flow power index and bed load transport intensity have a good agreement.

关 键 词：无量纲综合因子 水流强度指标 输移特性 推移质泥沙 黄河中下游 

分 类 号：TV147[水利工程—水力学及河流动力学]