Dam Break Risk Analysis of Group of Small Earthquake-damaged Reservoirs and Its Application Based on Event Tree Method

Analysis of the dam break risk of group of small earthquake-damaged reservoirs is important to determine the order of reinforcement and use patterns of the funds.In connection with earthquake-damaged reservoirs in Anxian County of Sichuan Province,the dam break probability of each reservoir is calculated by event tree method.And then the dam failure of each reservoir is calculated to determine the dam break risk degree of each reservoir by using comprehensive evaluation function.At the same time,the risk of all reservoirs is sorted from large to small.Finally,the order of reinforcement of regional small earthquake-damaged reservoirs is determined.The example shows that the method is simple and practical,which is beneficial to correctly understand and assess dam break risk of group of small earthquake-damaged reservoirs.