Abstract:

Based on WRF model,using representative precipitation cases in different region with the Yangtze River water bodies added and the local terrain modified in the inherent underlying surface,the local circulation features and different meteorological elements of the response for local surface changes were studied.The results showed that changed precipitation zone was not obvious with the Yangtze River Water bodies imbedding in the different regional rainfall cases,which indicated that the Yangtze River water bodies affected local precipitation weakly.The Yangtze River underlying surface imbedded and the terrain height modified simultaneously had great influence on the spatial rainfall variation,and the situation was the same as modified terrain height independently.It suggested that local topography was important to the spatial rainfall.The variation of relative humidity distant from ground at 2 meters were different in different regional rainfall cases with changed underlying surface water bodies,and the impact on local relative humidity was inconspicuous overall.The temperature at 2 m away from ground,surface upward moisture flux and surface upward heat flux increased mostly,which were more obvious in the Yangtze River turning under the role of local terrain “bell