Driving forces and their interactions of soil erosion in soil and water conservation regionalization at the county scale with a high cultivation rate  

作　　者：LUO Bang-lin LI Jiang-wen GONG Chun-ming ZHONG Shou-qin WEI Chao-fu 

机构地区：[1]College of Resources and Environment,Southwest University,Chongqing 400716,China [2]Key Laboratory of Eco-environment in Three Gorges Region(Ministry of Education),Southwest University,Chongqing 400716,China [3]Chongqing Water Conservancy&Electric Power Construction Survey&Design Research Institute Co.,LTD,Chongqing 401120,China [4]Key Laboratory of Arable Land Conservation(Southwestern China),Ministry of Agriculture,Chongqing 400715,China [5]State Cultivation Base of Eco-agriculture for Southwest Mountainous Land,Southwest University,Chongqing 400715,China

出　　处：《Journal of Mountain Science》2023年第9期2502-2518,共17页山地科学学报（英文）

基　　金：supported by the Fundamental Research Funds for the National Natural Science Foundation of China(No:42077007);the General Project of Chongqing Natural Science Foundation(No:CSTB2022NSCQ-MSX0446)。

摘　　要：Soil erosion control based on county scale Soil and Water Conservation Regionalization(SWCR)is an essential component of China's ecological civilization construction.In SWCR,the quantitative analysis of the spatial heterogeneity and driving factors of soil erosion among different regions is still lacking.It is of great significance for soil erosion control to deeply examine the factors contributing to soil erosion(natural,land use,and socioeconomic factors)and their interaction at the county and regional levels.This study focused on a highly cultivated area,Hechuan District of Chongqing in the Sichuan Basin.The district(with 30 townships)was divided into four soil and water conservation regions(Ⅰ-Ⅳ)using principal component and hierarchical cluster analysis.The driving factors of soil erosion were identified using the geographical detector model.The results showed thatⅰ)the high cultivation rate was a prominent factor of soil erosion,and the sloping farmland accounted for 78.4%of the soil erosion in the study area;ⅱ)land use factors demonstrated the highest explanatory power in soil erosion,and the average interaction of land use factors explained 60.1%of soil erosion in the study area;ⅲ)the interaction between natural factors,socioeconomic factors,and land use factors greatly contributes to regional soil erosion through nonlinear-enhancement of double-factor enhancement.This study highlights the importance of giving special attention to the effects of land use factors on soil erosion at the county scale,particularly in mountainous and hilly areas with extensive sloping farmland and a high cultivation rate.

关 键 词：Soil and Water Conservation Regionalization Driving factors Soil erosion Geographical detector model Spatial heterogeneity 

分 类 号：S157[农业科学—土壤学]