ABSTRACT
Considering the integrity and unity of data sequence, it was ultimately determined to use the daily rainfall data of 84 meteorological stations from 1980 to 2009. The power function model widely used in China was selected to calculate the rainfall erosivity (Zhang et al. 2003). The average annual rainfall erosivity was graded by the hydrological frequency analysis method (Guo et al. 2010). At the same time, the mutation points of the time series of rainfall erosivity were determined by the non-parameter Mann-Kendall test method (Li et al. 2011). The different rainfall erosivity phased variation characteristics were explored by the accumulation of the measured data distance away from average (Wang et al. 2007), abbreviated as ADDA. In the spatial analysis, the spatial interpolation of rainfall erosion force is analyzed by using the radial basis function interpolation method in ARCGIS10.2 software.
