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[1]LI Yimin,LIU Shiyi,LI Yingying,et al.Spatiotemporal Changes and Influencing Factors of Soil Erosion in Fugong County Based on GIS[J].Research of Soil and Water Conservation,2022,29(03):57-63+70.

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Spatiotemporal Changes and Influencing Factors of Soil Erosion in Fugong County Based on GIS

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 03 Page number: 57-63+70 Column: Public date: 2022-04-20

Title:: Spatiotemporal Changes and Influencing Factors of Soil Erosion in Fugong County Based on GIS

Author(s):: LI Yimin^1,2, LIU Shiyi¹, LI Yingying¹, WU Bowen¹, JI Peikun¹; (1.School of Earth Sciences, Yunnan University, Kunming 650500, China; 2.Research Center of Domestic High-Resolution Satellite Remote Sensing Geological Engineering, Kunming 650500, China)

Keywords:: soil erosion; RUSLE model; geographical detector; Fugong County

CLC:: S157.1

DOI:: -

Abstract:: Carrying out the analysis of the temporal and spatial dynamics of soil erosion in Fugong County is of great significance to the local soil erosion control, ecological environment construction, and land and space planning. Based on rainfall, land use, soil and vegetation coverage data, GIS technology and the RUSLE model were used to calculate the spatiotemporal changes of soil erosion in Fugong County in 2002, 2010 and 2018, and to analyze the influencing factors. The results show that:(1)the soil erosion intensities in Fugong County were mainly micro-erosion and light-erosion which accounted for more than 91% of the total area of the study area; the average soil erosion modulus from 2002 to 2010 to2018 continued to decline, the slightly eroded area continued to increase, and the soil erosion situation in Fugong County was showing an improvement trend;(2)the severe soil erosion areas in Fugong County mainly distributed on both banks of the Salween River; in the past 16 years, more than 74% of the areas in Fugong County had not changed the soil erosion intensity; the overall improvement had shown that the implementation of projects such as returning farmland to forests had a certain effect on suppressing soil erosion intensity;(3)land use type was the dominant factor on the spatial distribution of soil erosion in Fugong County; the explanatory power of each factor decreased in order: land use type>vegetation coverage>average annual rainfall> Altitude>slope; the q value of the land use type factor was the largest, which was the dominant factor in the spatial distribution of soil erosion in Fugong County; areas with an altitude of 1 005～1 523 m, a slope of >35°, an average annual rainfall of 1 482～1 671 mm, a vegetation coverage of <0.3, and an unused land use type were identified as high-risk erosion areas. Based on the actual situation of Fugong County, sloping farmland should be a key area for soil erosion control in Fugong County.

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Last Update: 2022-04-20