Based on a long time series(1980-2009)daily rainfall data collected by 83meteorological stations

the rainfall erosivity in Zhejiang Province was calculated by using daily rainfall erosivity model.The temporal changes and its spatial distribution characteristics of rainfall erosivity were analyzed by using the non-parametric Mann-Kendall test and radial basis function interpolation.The results indicated that there are no significant changes in the long-term mean annual rainfall erosivity

significant increases of rainfall erosivity occurred in winter

especially in January and December.An increasing trend in mean annual rainfall erosivity was showed from the northwest to the southeast of Zhejiang Province.While the most monthly and seasonally rainfall erosivity changes mainly occurred in the northern and the central part of Zhejiang Province with the rainfall erosivity was obviously higher in summer than that in other three seasons.As the main region where the most significant rainfall erosivity changes occurs

and the region with relative high rainfall kinetic energy

southeast part of Zhejiang Province was regarded as the key area for soil and water conservation.