冲积河流的水流挟沙能力  

Sediment-carrying capacity of flow for alluvial rivers

作　　者：周宜林[1] 陈立[2] 王明甫[2] 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098 [2]武汉大学水利水电学院,湖北武汉430072

出　　处：《水利水运工程学报》2004年第2期7-15,共9页Hydro-Science and Engineering

基　　金：国家自然科学基金资助项目(51339170)

摘　　要：在前人研究成果的基础上分析了水流挟沙的物理模式,以挟沙水流紊动能量方程为理论基础,得出了紊动能产生项和粘性耗散项的表达式,由此推导出适用于水流的紊流三区(光滑区、过渡区和粗糙区)的挟沙能力计算式.依据天然河流实测资料和室内水槽试验资料,验证了该水流挟沙能力计算式.针对该计算式分析了影响水流挟沙能力的因素.The physical model of flow carrying sediment is analyzed based on the previous research findings. The expressions of the terms of turbulent production and viscous dissipation are obtained taking the turbulent energy equation of flow carrying sediment as a theoretical base, then a universal formula of sediment-carrying capacity for turbulent flows at smooth, transitional and rough zones is deduced. The formula is verified by the field and experimental flume data, and the influence of the main factors on sediment-carrying capacity is analyzed.

关 键 词：紊流 高含沙水流 水流挟沙能力 冲积河流 

分 类 号：TV131.21[水利工程—水力学及河流动力学]