Characteristic Analysis of Rainfall Erosivity in the Typical Areas
According to the typical meteorological sites selected by the size of annual rainfall from the southeast to the northwest region,the daily rainfall data of 194 weather stations in China were used to analyze the inter-annual and decadal variability and spatial distributions of rainfall erosivity in different sites.The results showed that average rainfall erosivity in southeast region for each site was more than 4 000 MJ · mm/(hm2 · h · a).The rainfall erosivity in Yulin and Yan'an were 1 324.05,1 880.64 MJ · mm/(hm2 · h · a) and there were obvious lower than those in southeast region.The spatial distribution of rainfall erosivity was similar to rainfall,but there was inconsistent with actual soil erosion.The inter-annual variability of rainfall erosivity was obvious,but the decadal variability was stable.Due to the lowest average relative and variability of relative deviation,the monthly rainfall model of Zhou Fujian in Fujian could well reflect rainfall erosivity in the region.
国家科技期刊平台
NSTL
万方数据
维普
