Urban Micro-scale Flood Risk Evaluation Based on Scenario Simulation

To improve the level of urban flood risk management and reduce the urban flood threat, it is very necessary to strengthen the management and technology research of urban micro-scale flood risk. At present, the urban flood risk evaluation is mainly concentrated on the macro- and meso-scale spatial objects with rough and low accuracy evaluation results. There is a lack of research of high-precise urban flood risk evaluation from the micro-scale space. In this paper, the micro-scale object, such as urban street and community level, is studied. The precise urban geographic information is extracted from the remote sensing map. The basic information of social economy and the flood loss rate curve are obtained by social and economic investigation. Combining with scenario simulation and social economy information, the high-precise urban flood risk evaluation is conducted. The evaluation method can provide scientific decision support for urban risk management, risk transformation, city planning, etc.