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[1]Xu Changan,Wang Naiju.Spatiotemporal differentiation and quantitative attribution of soil erosion in southern Anhui based on RUSLE and GeoDetector[J].Research of Soil and Water Conservation,2025,32(01):21-29.[doi:10.13869/j.cnki.rswc.2025.01.019]

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Spatiotemporal differentiation and quantitative attribution of soil erosion in southern Anhui based on RUSLE and GeoDetector

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 32 Number of periods: 2025 01 Page number: 21-29 Column: Public date: 2025-01-10

Title:: Spatiotemporal differentiation and quantitative attribution of soil erosion in southern Anhui based on RUSLE and GeoDetector

Author(s):: Xu Changan¹, Wang Naiju²; (1.School of Biology,Food and Environment,Hefei University,Hefei 230601,China; 2.School of Tourism and Convention & Exhibition,Hefei University,Hefei 230601,China)

Keywords:: soil erosion; RUSLE model; GeoDetector; southern Anhui region

CLC:: S157.1

DOI:: 10.13869/j.cnki.rswc.2025.01.019

Abstract:: [Objective]The objectives of this study are to reveal the spatiotemporal differentiation characteristics and causes of soil erosion in southern Anhui Province and to provide a scientific basis for soil erosion prevention and control in this region.[Methods]Based on the RUSLE model and GeoDetector, combined with multi-source remote sensing data, the spatial and temporal distribution and influencing factors of soil erosion in southern Anhui were explored. [Results](1)The spatial distribution of soil erosion in this region from 2002 to 2022 was significantly different. The Dabie Mountains in the north of Anqing City, the Dalongshan area in the southeast of Anqing City, the Lion Mountain area in the eastern part of Tongling City and the central and western parts of Wuhu City, the southern part of Chizhou City and Xuancheng City, the Huangshan Mountain Area in Huangshan City and the surrounding Qiyun Mountain and Baiji Mountain were the main erosion areas. However, the soil erosion in the plains along the river and other river valleys in the cities of Anhui was small.(2)From 2002 to 2022, soil erosion in this area showed a general trend of ‘decreasing-rising-decreasing'. Among them, the total erosion in 2002 was 22 314 100 t/a, which decreased to 21 180 500 t/a in 2007, increased to 24 523 600 t/a in 2012, and then continued to decline to 20 606 700 t/a in 2022.(3)The explanatory power results of each factor detector show that land cover type, slope, altitude and rainfall are the main influencing factors in this area.(4)In 2002, 2017 and 2022, the explanatory power of land cover type and other factors on soil erosion was greater than that of other factors, while in 2007 and 2012, the explanatory power of vegetation cover and other factors on soil erosion was more prominent.(5)Based on the soil erosion data and factor data in 2022, the high-risk areas were shrubs with vegetation coverage less than 37.1%, average annual precipitation ranging from 1 971.96 to 2 092.37 mm, slope greater than 63.96°, altitude between 1 056 m and 1 819 m, and average annual temperature ranging from 10.46 ℃ to 11.3 ℃. [Conclusion]Soil erosion has improved in southern Anhui in the past 20 years, but the mountainous and hilly areas with large slopes, low vegetation coverage, high rainfall intensity and irrational land use are still high erosion risk areas, and future prevention and control efforts should be aimed at these key areas.

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Last Update: 2025-01-10