城市暴雨内涝情景模拟与灾害风险评估英文.doc

DOI: -011-0844-7
© 2011
Science Press
Springer-Verlag
Community-based scenario modelling and disaster
risk assessment of urban rainstorm waterlogging
YIN Zhan’e1, YIN Jie2, *XU Shiyuan2, WEN Jiahong1
1. Geography Dept. of Shanghai Normal University, Shanghai 200234, China;
2. Geography Dept. of East China Normal University, Shanghai 200062, China
Abstract: Scenario modelling and the risk assessment of natural disasters is one of the hot-
spots in disaster research. However, up until now, urban natural disaster risk assessments mon procedures and programmes. This paper selects rainstorm waterlogging as a disaster to research, which is one of the most frequently occurring hazards for most cities in China. As an example, we used a small-scale integrated methodology to assess risks relating to rainstorm waterlogging hazards in the Jing’an District of Shanghai. Based on the basic concept of disaster risk, this paper applies scenario modelling to express the risk of small-scale urban rainstorm waterlogging disasters in different return periods. Through this analysis of vulnerability and exposure, we simulate different disaster scenarios and propose prehensive analysis method and procedure for small-scale urban storm waterlogging disaster risk assessments. A grid-based Geographical Information System (GIS) approach, including an urban terrain model, an urban rainfall model and an urban drainage model, was applied to simulate inundation area and depth. Stage-damage curves for residential buildings and contents were then generated by the loss data of waterlogging from field surveys, which were further applied to analyse vulnerability, exposure and loss assessment. Finally, the ex- ceedance probability curve for disaster damage was constructed using the damage of each simulated event and the respective exceedance probabilities. A framework was also devel- oped for coupling the waterlogging risk with the risk planning and management through the exceedan