Investigation of non-cohesive levee breach by overtopping flow  

作　　者：余明辉 魏红艳 梁艳洁 赵勇 

机构地区：[1]State Key Laboratory of Water Resources and Hydropower Engineering Sciences, Wuhan University [2]State Yellow River Engineering Consulting Co., Ltd. [3]Changjiang Engineering Supervision and Consulting Co.

出　　处：《Journal of Hydrodynamics》2013年第4期572-579,共8页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Basic Research and Development Program of China (973 Program, Grant No.2011CB403304);the National Natural Science Foundation of China (Grant No. 11272240)

摘　　要：This paper presents an experimental study of the overtopping breach of homogeneous non-cohesive levee or dike in a 180°bend rectangular flume. Detailed experimental and numerical results provide information on the breach flow discharge and longitudi- nal and transversal breach profiles for this type of levee. It is indicated that the water level and the flow discharge in the river and the levee material properties are significant influencing factors for the breach evolution. The plane form of the breach is approximately an asymmetrical hyperbola. A formula with a non-constant flow factor is proposed to compute this kind of breach discharge.This paper presents an experimental study of the overtopping breach of homogeneous non-cohesive levee or dike in a 180°bend rectangular flume. Detailed experimental and numerical results provide information on the breach flow discharge and longitudi- nal and transversal breach profiles for this type of levee. It is indicated that the water level and the flow discharge in the river and the levee material properties are significant influencing factors for the breach evolution. The plane form of the breach is approximately an asymmetrical hyperbola. A formula with a non-constant flow factor is proposed to compute this kind of breach discharge.

关 键 词：non-cohesive LEVEE OVERTOPPING breach discharge EXPERIMENTS 

分 类 号：TV133.1[水利工程—水力学及河流动力学]