巢湖流域土壤侵蚀动态变化及驱动分析

Dynamic Changes and Driving Analysis of Soil Erosion in the Chaohu Lake Basin

基于RUSLE完成巢湖流域2000年、2010年和2022年土壤侵蚀模数计算与强度分级,对侵蚀空间分布及动态变化规律展开分析,借助地理探测器完成侵蚀强度布局成因和格局变化影响因素分析。成果显示:微度和轻度全域面积占比超90%,全域整体处于轻等侵蚀水平,越向西南方向延伸全域土壤侵蚀现象越明显;22年内,微度全域面积占比处于持续升高变化状态增加了2.36%,中度和重度均波动下降了0.32%和0.25%;虽然坡度对侵蚀强度空间布局的形成起主导作用解释力为26.17%,而人类活动才是主导侵蚀强度格局的动态变化的关键因素。对巢湖流域土壤侵蚀的变化规律及驱动因素进行探讨,可助力流域土壤侵蚀综合治理。

Based on RUSLE,the calculation and intensity grading of soil erosion modulus in the Chaohu Basin in 2000,2010,and 2022 were completed.The spatial distribution and dynamic changes of erosion were analyzed,and the factors affecting the layout and pattern changes of erosion intensity were analyzed using geographic detectors.The results show that the proportion of micro and mild soil erosion in the entire area exceeds 90%,and the entire area is at a light erosion level.The more it extends towards the southwest,the more obvious the soil erosion phenomenon in the entire area.Within 22 years,the proportion of micro degree global area has been continuously increasing and changing,increasing by 2.36%,while both moderate and severe areas have fluctuated and decreased by 0.32%and 0.25%.Although slope plays a dominant role in the formation of spatial layout of erosion intensity with an explanatory power of 26.17%,human activities are the key factor in the dynamic changes of erosion intensity pattern.The paper explores the changing patterns and driving factors of soil erosion in the Chaohu Basin,which can assist in the comprehensive management of soil erosion in the basin.