Soil erosion calculation in the hydro-fluctuation belt by adding water erosivity factor in the USLE model  

作　　者：XIN Zhi-yuan XIA Jian-guo 

机构地区：[1]College of Resources,Sichuan Agricultural University,Chengdu 611130,China

出　　处：《Journal of Mountain Science》2020年第9期2123-2135,共13页山地科学学报（英文）

基　　金：financially supported by the National Key Research and Development Program of China(Grant No.SQ2018YFD080041);the Sichuan Science and Technology Program(Grant No.2017SZ0188)。

摘　　要：Soils in the hydro-fluctuation belts of the reservoirs are most highly influenced by the special hydro-conditions and reservoir operation,leading to unique soil erosion process and largely accelerate soil erosion intensity.The present study aimed to estimate soil erosion rate in the hydro-fluctuation belt of the Pubugou Reservoir,Southwest China,based on the framework of Universal Soil Loss Equation(USLE).An attempt has been made to modify the original USLE by including the reservoir water erosivity(W),a new factor into the model.Soil erosion rate from different land use types were quantitatively estimated,using the USLE and the modified USLE respectively.Field observation showed that soil erosion rate in dry farmland,bare land and grassland was 4700,44600 and 5050 t/km2,respectively.The erosion rate assessed by the modified USLE was closely related to that recorded from the field monitoring data.The findings of this study clearly highlight the importance of inclusion of the W factor to the original USLE model while assessing soil erosion in the reservoir hydro-fluctuation belt.

关 键 词：Modified USLE Water erosivity Soil erosion Hydro-fluctuation belt Reservoir 

分 类 号：S157.1[农业科学—土壤学]