Development in embankment dam break simulation and water flow simulation

This article summarizes and evaluates the updated research on the breaching simulation technology of embankment dams,and puts forward Mme proposals for future research in this regard,including the analysis and evaluation approaches to the possibility of dam breach of various dam types,the undertaking of the centrifugal rmdel experiments on the dam breach of different types,the focus on the failure mechanism and the process of breach development due to different hazard factors,and the experimental studies carried out on the piping development process so as to open out changing flow transition from orifice to weir.Since the streamline curvature of the dam-breaching flow is steep,the flow is rmstly ultra-critically unsteady and the gradation range of the grain size of the dam building material is quite wide,etc.The large-scale hydraulic model experiments on dam breach should be conducted out,and for different dam types,the in-depth studies should be done alms on the breach outflow process,the sediment transport and the flood ewlvement at the downstream river course.