Abstract:

SuzhouWuxiChangzhou,one of the most economically developed areas in China,which lies in Taihu Basin, is also one of the largest urban agglomerations in the world.Rapid urbanization has caused great changes in the regional natural environment and processes of precipitation.Taking Suzhou,Wuxi,Changzhou as typical cities,based on the long term 〖JP2〗precipitation,with the premise of the same meteorological〖JP〗 background,this paper probed into the effect of urbanization on local precipitation by comparing the precipitation in urban and suburban gauges using linear regression,MannKendall trend analysis,R/S method.The results showed that in the phase of slow urbanization development,the difference of precipitation in urban areas and suburban areas was little;in the phase of quick urbanization development,like Suzhou and Wuxi,urban rain island effect was evident,while it was not evident in Changzhou with slow development.And this situation may not change in the near future.This study also lays the foundation for the urban agglomerations downstream in the Yangtze River delta.