Effects of rainfall and rocky desertification on soil erosion in karst area of Southwest China

作     者：PAN Li-dong LI Rui SHU Dong-cai ZHAO Li-na CHEN Mei JING Jun PAN Li-dong;LI Rui;SHU Dong-cai;ZHAO Li-na;CHEN Mei;JING Jun

作者机构：School of Karst ScienceGuizhou Normal UniversityGuiyang 550001China State Engineering Technology Institute for Karst Desertification ControlGuiyang 550001China College of Resources and EnvironmentSouthwest UniversityChongqing 400715China Guizhou Hydrology and Water Resources BureauGuiyang 550002China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2022年第19卷第11期

页      面：3118-3130页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 

基　　金：supported by National Natural Science Foundation of China(NO.32060372,NO.31760243) Guizhou Science and Technology Department(Qiankehe ZhichengYiban462) 

主　　题：Erosive rainfall Rocky desertification Spatial-temporal evolution Soil erosion Karst 

摘      要：Monitoring and evaluating the evolution of rocky desertification timely and studying the characteristics of soil erosion under different rainfall patterns are of great scientific significance for regional soil and water conservation,rocky desertification control and ecological environment *** periods of remote sensing image data from 2005 to 2020 were selected to study the evolution characteristics of rocky desertification and its impact on soil erosion in the controlled boundary area of Shibantang hydrological station of Yeji River Watershed,Guizhou Province,*** to the 408 erosive rainfall events,the soil erosion under different rainfall patterns in the watershed was *** results showed that:erosive rainfall events in the study area were mainly pattern A,accounting for 57.4%of the total rainfall events;the second was pattern B,accounting for 28.9%of the total rainfall events;the rainfall pattern of C occurred *** them,pattern A was the main rainfall pattern leading to soil and water loss and had the largest contribution rate to soil erosion in the *** 2005 to 2020,the area of rocky desertification showed a decreasing trend,accounting for 72.2%from 87.9%.Spatially,rocky desertification has mainly concentrated in the middle south of the watershed since 2010,while the rocky desertification mainly concentrated in the middle and north before *** effects of different grades of rocky desertification on soil erosion were different,and the soil erosion modulus in areas with the medium,severe and extremely severe rocky desertification was generally *** soil erosion modulus estimated by the RUSLE(Revised Universal Soil Loss Equation)model was still much higher than that calculated by the data measured by the hydrological monitoring ***,the application of the RUSLE model in karst area needs to be further *** results can provide reference for rocky desertification control,soil erosio