Applicability of two satellite-based precipitation products for assessing rainfall erosivity in China

Soil erosion has become one of the most serious environmental problems worldwide, and rainfall is considered a crucial factor in water erosion. Rainfall erosivity defined as ability precipitation to trigger soil The accurate assessment essential before taking appropriate measures stop or slow down In this study, we calculated China using Xie model two satellite-based products (SPPs). Gauge-based data from 2417 stations were used for comparison results. We also proposed procedure assess performance SPPs four statistical metrics provided recommendations different sub-regions at time scales. results showed that annual based on IMERG-F TMPA 3B42-V7 situ gauge 2014, 1954, 2138 MJ·mm/(hm2·h·yr), respectively. spatial correlation between 0.944 product 0.909. variation trends highly similar those gauge-based all recommended estimating Haihe River Basin Huaihe monthly scale, seasonal Basin, Yellow scale; while remaining regions except Continental Basins three Generally, broader applicability than China. study provide reference selecting suitable estimates.