Soil erosion stands as a significant ecological challenge for Lichuan City,the sensitivity assessment of soil and water loss is the basis for formulating soil and water conservation measures.This study integrates the Revised Universal Soil Loss Equation(RUSLE)model,hotspot analysis,standard deviation ellipse,and geographical detector techniques to scrutinize the spatiotemporal dynamics of soil erosion sensitivity and its determinants in Lichuan City from 2002 to 2022.The results show that the sensitivity of soil and water loss in Lichuan City is mainly slight,but there are obvious differ-ences in sensitivity in different years and regions.In 2002,extensive areas such as Baiyangba,Tuanbao,and Wendou ex-hibited relatively high sensitivity levels.However,by 2012 and 2022,a decline in sensitivity was observed in most re-gions,with the exception of an increasing trend in areas like Dongcheng,Duting,and Wangying.The spatial distribution of soil erosion hotspots has contracted,exhibiting a trend toward central aggregation,with the gravitational center shifting to-wards the central urban district.Vegetation coverage and land use types emerge as pivotal factors influencing the spatial distribution of soil erosion sensitivity.Notably,the interplay among vegetation coverage,slope gradient,land use,and li-thological characteristics markedly amplifies the spatial distribution of sensitivity.In the future,more attention should be paid to soil conservation in areas with low vegetation coverage,broken terrain and weak rock mass.
soil erosionRUSLE modelspatial-temporal patterngeographical detectorLichuan City
万方数据
维普
