NUMERICAL ANALYSIS ON GLACIAL LAKE OUTBURST DUE TO MORAINE DAM FAILURE BY SEEPAGE AND OVERTOPPING

抄録

The glacial lake outburst due to moraine dam failure has been investigated through numerical model and flume experiments. A numerical model has been developed to compute the characteristics of the glacial lake outburst due to moraine dam failure by seepage flow and overtopping. Numerical analyses of seepage and moraine dam failure have been also performed. To compute the pore water pressure in the dam and slope stability of the dam, a seepage flow model and a slope stability model are incorporated into a numerical model of flow and dam surface erosion. The simulated results of the outburst discharge, seepage profile, failure surface and dam surface erosion are compared with the experimental results.