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risk analysis AND MANAGEMENT OF URBAN RAINSTORM WATER LOGGING IN tianjin

Journal of Hydrodynamics 2006年第5期18卷 552-558页

作者： HAN Su-qin XIE Yi-yang LI Da-ming LI Pei-yan SUN Mei-ling College of Environmental Science and Engineering Nankai University Tianjin 300071 China Tianjin Meteorology Institute Tianjin 300074 China tianjin Meteorology Institute Tianjin 300074 China School of Civil Engineering Tianjin University Tianjin 300072 China

The risk analysis of urban rainstorm water logging facing tianjin city by using methods of probability, investigation and numerical simulation was carried out in this article. Firstly, a mathematical model for the urban rainstorm water logging was established on the basis of one- and two-dimensional unsteady flow theory and the technique of non-structural irregular grid division, Secondly, the precipitation over heavy rain was divided into seven grades, the experiential expression of frequency and rain grades was got according to the observed rainfall from May 1918 to October 1998. Thirdly, the mathematical model was used to simulate various rain process according to the features of the rainstorm and the draining rule, based on the simulated maximum water depths, 3 class of disaster extents were established, the disaster risks were mainly in Class Ⅰ and Class Ⅱ, The risk analysis of water logging on traffic were primarily evaluated, and finally, some management and mitigation measures of the urban rainstorm water logging disaster were discussed.

关键词： urban rainstorm water logging mathematical model traffic disaster risk analysis,tianjin

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