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Investigation of non-cohesive levee breach by overtopping flow 被引量:2

Investigation of non-cohesive levee breach by overtopping flow
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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.
出处 《Journal of Hydrodynamics》 SCIE EI CSCD 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)
关键词 non-cohesive LEVEE OVERTOPPING breach discharge EXPERIMENTS non-cohesive, levee, overtopping, breach discharge, experiments
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