The Mechanism Study Of Dam-break And Simulation Of Flood Wave

With the peak utilization of hydropower resources has come in China.During this period, more and more dams is being built. If the dam burst, the people living in the downstream will face with hazards,so the research topic on dam burst risk analysis theory and assessment methods is very important to more and more hydrologists.In this paper, from the basics to consider the dam-break , the study provides data on basic theory and critical for the research topic on dam burst risk analysis theory and assessment methods, The study of the dissertation in dam-break as follows:(1) According to the current model of partial dam-break which changed gradually, based on the limit equilibrium theory in stability analysis of slopes,the force condition of the block avalanche soils is considered to improve the theory of slope stability analysis ,combined with breach formation changed with erosion and the upper reaches of the reservoir water level changed with time. The study create a new model of partial dam-break gradually , The model is applied to an instance of the Tangjiashan Lake, the model's usefulness is been proven through the flow of dam-break.(2) The methods how to calculate peak flow of dam-break are introduced. Based on riemann problem, adopting finite volume method to discrete shallow water equation. Then the CFD software Fluent is applied to Simulate the dam-break water flow state, And to prove its correct by comparing the result of riemann problem or the results of the study abroad. At last, the work simulate dam-break flood wave combined with the new model of partial dam-break gradually.