基于MIKE模型的水库溃坝洪水数值模拟分析

Analysis of dam break simulation based on MIKE model

通过构建溃坝洪水MIKE数值模型,模拟分析漫顶全溃、管涌半溃、漫顶半溃3种工况下的洪水影响。结果表明,研究对象漫顶全溃洪峰到达时间为1.5h,洪峰流量22591m^(3)/s,最大淹没范围308km^(2);管涌半溃洪峰到达时间为1.8h,洪峰流量20165m^(3)/s,最大淹没范围为290km^(2);漫顶半溃洪峰到达时间为2h,洪峰流量14313m^(3)/s,最大淹没范围为227km^(2)。漫顶全溃的洪水影响最大,其次为管涌半溃,最小的为漫顶半溃。模拟分析水库溃坝洪水,可为工程管理、应急管理等提供重要参考依据。

The MIKE numerical model of dam break flood is constructed to simulate and analyze the flood impact under three conditions:overtopping full break,piping semi-break,overtopping semi-break.The results show that the peak arrival time of overtopping full break is 1.5h,the peak flow is 22591m^(3)/s,and the maximum flooding range is 308km^(2).The peak arrival time of piping semi-break is 1.8h,the peak flow is 20165m^(3)/s,and the maximum flooding range is 290km^(2).The peak arrival time of overtopping semi-break is 2h,the peak flow is 14313m^(3)/s,and the maximum flooding range is 227km^(2).The flood of overtopping full break have the greatest impact,followed by piping semi-break,and the smallest is overtopping semi-break.Simulation and analysis of dam-break flood can provide important reference for,engineering and emergency management.