Urban Waterlogging Risk Assessment from the Perspective of the Optimal Scale Transformation-Analytic Hierarchy Process
Against the background of frequent occurrence of urban waterlogging due to heavy rainfall,this study took the main ur-ban area of Fuxin City,Liaoning Province,as the research object,and utilized a drone to collect high-precision orthophotos and DEM,and established a coupled hydrodynamic model of InfoWorks ICM by combining the data of the city's drainage network for simulation research and accuracy verification of urban waterlogging.By analyzing the three components of the urban waterlogging disaster system-disaster causing factors,disaster conceiving environment and disaster bearing body,the optimal scale transformation and Analytic Hierarchy Process(AHP)were performed on their indicator factors to establish a waterlogging risk assessment model.The urban waterlogging risk assessment model was established using scenario simulation results and indicator system technology,and the intuitive risk assessment map was drawn using GIS spatial analysis technology.The causes of waterlogging in the main ur-ban area of Fuxin City were explained from multiple perspectives and suggestions were provided,and the results of the study can also provide a reference for the prevention and control of waterlogging in other cities.
InfoWorks ICM modelrisk assessment of waterloggingoptimal scale transformationanalytic hierarchy process
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