【摘要】 水库大坝的修筑,使得水能资源得到了更好的利用,但是也不能忽略水库大坝的工程事故带来的风险性灾害。一旦发生溃坝事故,将会对下游区域造成巨大的灾害影响。以某大型水库为研究对象,采用MIKE Flood耦合模型对溃坝洪水频率、大坝溃决历时和终溃高度等因素对溃坝水流的影响进行模拟计算。模型采用逐渐溃形式对溃坝洪水演进情况进行模拟,计算结果表明:大坝溃决历时对溃口流量和下游区域的淹没情况影响较大;溃坝洪水频率越大、溃决历时越短、终溃高度越低,下泄流量越大,下游区域的淹没情况也越严重。更多还原

【Abstract】 The construction of Reservoir Dam makes better use of water resources. However,the risk disasters caused by engineering accidents of reservoir dams can not be ignored. In case of dam break,it will cause huge disaster impact to downstream area. In this paper,a large reservoir is taken as the research object,and the MIKE Flood coupling model is used to simulate the effects of flood frequency,duration and height of dam break on dam break flow. The model simulates the flood routing of dam-break in the form of gradual collapse. The calculation results show that the duration of dam break has a great influence on the flow rate at the break and the submergence in the downstream area. The higher the frequency of dam-break flood,the shorter the duration of dam-break and the lower the height of dam-break,the greater the discharge flow and the more serious the inundation of downstream area.更多还原