An Initial Probe of Rainfall Erosivity and Its Simple Refined Model in Yingtan, Jiangxi Provinceural
Climatic erosivity and its characteristics were studied by analyzing data on rainfalls recorded from 1999 to 2003 in the Ecological Experiment Station of Red Soil (EESRS) located in Yingtan, Jiangxi Province. The results showed that there were 180 rainfalls causing soil erosion in all from 1999 to 2003. Rainfall mainly took place in between April and June. According to R values of the ″EI30″ method, the rainfall erosivity each year during the observation was calculated to be 3 722.3,6 864.2,4 520.5,6 299.1 and 5 580.9 MJ·mm / (hm2·h·y). In addition, a simple refined model was established tentatively according to the rainfalls and can be used to calculate the value of rainfall erosivity R in this area.