Risk Analysis Method for Reservoir Dam Safety Based on Bow-Tie Model
China has the largest number of reservoir dams in the world.These dams play a very important role in flood control,water diversion,production capacity,and improvement of navigation conditions of river channels.At the same time,there is a potential threat of dam break.Once they are damaged,the consequences are very serious.The dam operation environment is complex,the causes of accidents are diverse,and the impact of accidents is large.At present,the commonly used fault tree method,event tree method,analytic hierarchy process and other methods are difficult to express the complex variables and structures visually.This paper introduces a new method-"Bow-tie Model",which can analyze the causes and consequences of the accident as a whole,and set up risk barriers on this basis,so as to achieve the purpose of risk management.