Abstract: The research on choice of spatial interpolation methods for studying spatial and temporal distribution of erosivity has positive significance to forecasting of soil loss and planning for soil and water conservation.Based on the rainfall records of the 260 stations in Jiangsu Province from 2001 to 2006,mean rainfall erosivity of each station over the years was worked out using Bu-algorithm,and analyzed and compared with geostatistics for errors.Results show that the ordinary Kriging method,with the presence of parameters of the second-order,spherical semi-variogram model,performed better than other interpolation methods,and it fits with Jiangsu Province quite well.Based on the principles for location of the rainfall stations of the soil and water conservation project,the chosen ordinary Kriging method was used to verify the locations of some representative stations.It was found that the site selection method was feasible.

Key words: rainfall erosivity, geostatistics, interpolation, Jiangsu