A dam-breach erosion model: I. Formulation

This paper, Part I in a series of two, develops a mathematical model for earthern dam breach erosion. This model constitutes an extension of the Breach Erosion of Earthfill Dams (BEED) model developed by Singh and Scarlatos (1987). Two aspects are emphasized: the evolution of the dam breach, and the subsequent flood and sediment routing. Simulation of dam breach evolution is based on hydrologic, geometric and geotechnic considerations. Einstein-Brown and Bagnold equations are utilized to compute the rate of erosion in the breached section. A water routing scheme, based on a modified version of the Muskingum method to simulate flow exchange between channel and floodplains, is used to route the resulting breach hydrograph. A sediment routing scheme based on the Muskingum method, modified to simulate deposition in floodplains, and deposition and scouring in the channel, is utilized to route the breach sediment graph. In Part II, the model is tested against historical dam failures, and an analysis is made to determine its sensitivity to various parameters.     

一维数字模拟在山区河道型水库溃坝洪水中的运用

阐述了Saint-Venan方程差分求解山区河道型水库溃坝洪水的基本方法,说明了该方法在池芦水库溃坝洪水模拟的情况,并与传统概化抛物线法计算溃口流量过程进行了对比.对比结果表明该方法较传统溃坝洪水计算方法精度有所提高,可供设计同行参考.