INFLUENCE OF URBANIZATION ON PRECIPITATION IN SUZHOU CITY

With the process of urbanization,mankind activities, special ground constructions and changes of atmosphere layers affect the precipitation in related urban regions.Suzhou is a typical city with dense water bodies and with rapid urbanization process in the Yangtze Delta Region.Based on the analysis of Suzhou's urbanization process and annual rainfall time series analysis of Suzhou and Wangting precipitation stations during 1953~2000,by comparing rural precipitation(Wangting precipitation station)with urban precipitation(Suzhou precipitation station) and comparing rainfalls at each station in different periods,the authors analyzed the effect of urbanization on distribution of annual rainfall,precipitation,rainfall frequency etc.In the end,the authors concluded that because of urbanization,annual rainfall,flood season rainfall and maximum daily precipitation have all increased,especially the maximum daily precipitation;distribution of annual rainfall and the frequency of all patterns of rainfall precipitation has increased,especially storm rainfall.