It has been a problem in multi-spatial-scale quantitative estimation of soil erosion that the substantive observational data based on small spatial scale could not be effectively utilized in analysis of larger spatial scale because of the scale effects. The effects of spatial scale and multi-spatial-scale quantitative estimation,as one of the key problems in soil erosion researches,is not only significant to the programming of soil and water conservation and the reasonable utilization of land in region,but ...