Research Of Set Pair Analysis Method To Urban Flood Risk Assessment And Flood Control Program Optimization

Urban flood disaster assessment system is of gerat complexity, including a variety of uncertainties, such as stochastic, fuzzy, gray and so on. In this paper the principle of set pair analysis has been introduced systematically and has been studied for characteristics of urban flood danger, vulnerability and flood control program optimization in urban flood fields. Principal contents and finding are as follows:1. Urban flood disaster system is a multi-level, multi-index and complicated system with a lot of uncertainty. Set pair analysis is used for calculating the single index subject in the paper. Variable fuzzy model, which is used for the assessment of urban flood disaster system'danger and applied to assess the Nanjing'flood disaster assessmnet, on set pair analysis is established.2. The two key problems of establishing the urban flood vulnerability assessmnet'model are how to ascertain index weight of assessment system and effectively deal with the fuzzy randomicity of the distribution. In this paper, set pair analysis'new model-based FAHP is established for vulnerability assessment of urban flood and algorithm Fuzzy analytic hierarchy process based on accelerating genetic is used for ascertain the index weight, Which was carried out Flood Vulnerability Assessment applied research of 29 cities in Hunan Province.3. On the basis of analysis of the current Chinese urban flood disaster mitigation efforts in flood prevention research background and current situation analysis of the status quo. The existent problems of current china urban flood control and disaster mitigation and the importance of urban flood control program optimization was pointed out. The new method is given to calculate Difference coefficient and partial connection number difference. A new model of set pair analysis is built to optimize urban flood control program, which was carried out to optimize urban flood control program.