Risk Assessment of Urban Waterlogging Based on GIS

Abstract

In this paper, based on ArcGIS spatial analysis technology, taking Tongshan County as an example, the risk index evaluation model of urban rainstorm waterlogging disaster is established. In the comprehensive risk assessment and regional research, the weight of each risk index is determined by analytic hierarchy process (AHP), and the fuzzy evaluation is applied to the raster data of GIS risk index, so as to realize the data management of risk index, the combination of spatial analysis and visual expression. The results of risk assessment classification and regionalization can provide technical support and decision support for urban waterlogging risk prevention and disaster reduction planning in Tongshan County.