Incipient Velocity of Non-uniform Sediment in Sloping River Bends  

作　　者：吴岩 徐海珏 许栋 白玉川 

机构地区：[1]State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University

出　　处：《Transactions of Tianjin University》2014年第3期163-167,共5页天津大学学报（英文版）

基　　金：Supported by the Science Fund for Creative Research Groups of the National Natural Science Foundation of China(No.51021004);the National Natural Science Foundation of China(No.50979066 and No.51009105);the Natural Science Foundation of Tianjin(No.12JCQNJC05600)

摘　　要：A model for incipient movement of sediment in rolling pattern was established. In this model, the starting of sediment particles under low transport rate, the exposure degree of sediment, the lateral slope of water surface and the effect of transverse circulating current induced by the hydraulic structure of bend flow were fully considered. A theoretical formula for the incipient velocity of non-cohesive and non-uniform sediment in sloping river bends was developed. The results from the theoretical formula compared well with the experimental data.A model for incipient movement of sediment in rolling pattern was established. In this model, the starting of sediment particles under low transport rate, the exposure degree of sediment, the lateral slope of water surface and the effect of transverse circulating current induced by the hydraulic structure of bend flow were fully considered. A theoretical formula for the incipient velocity of non-cohesive and non-uniform sediment in sloping river bends was developed. The results from the theoretical formula compared well with the experimental data.

关 键 词：sloping river bend non-uniform sediment exposure degree low transport rate of starting 

分 类 号：TV14[水利工程—水力学及河流动力学]