Rainstorm water logging is one of the most common natural disaster phenomena in many cities in China, which causes a great impact to urban life and social development. Linyuan Community in the town of Chuansha in Shanghai was selected as a study area. Information collected by means of a small-scale survey on a home-by-home basis, was used to reconstruct the water-logging scenario that seriously affected the community on September 20th, 2008. An integrated model was presented for disaster risk assessment of rainstorm waterlogging from hazard assessment, vulnerability assessment and exposure analysis. To perform scenario analysis and disaster risk assessment, an alternative method for producing several sets of data was implemented by combining aerial photo interpretation, the use of data questionnaires in a community-based field data collection campaign, and subsequent analysis using Geographical Information Systems(GIS). Finally, the average annual water logging loss was used to show the risk in Linyuan Community, and some reasonable suggestions for the risk planning and management were given.
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Geography and Geo-Information Science, Vol. 25, No. 6, Nov 2009