[1]HAN Jing,CUI Jinfang,YANG Wei,et al.Analysis of Soil Erosion Change and Driving Factors in Low Hilly Areas Based on InVEST Model[J].Research of Soil and Water Conservation,2022,29(05):32-39.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 05
Page number:
32-39
Column:
Public date:
2022-08-20
- Title:
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Analysis of Soil Erosion Change and Driving Factors in Low Hilly Areas Based on InVEST Model
- Author(s):
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HAN Jing, CUI Jinfang, YANG Wei, XU Yangji Zhe, QIN Donghui, GAO Fengjie
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(School of PubilcAdminstration and Law, Northeast Agricultural University, Harbin 150030, China)
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- Keywords:
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soil erosion; InVEST model; geographical detector; driving factors; mountain area
- CLC:
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S157.1
- DOI:
-
-
- Abstract:
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The most serious ecological threat in mountainous areas is soil erosion caused by unreasonable land use. In order to explore the temporal and spatial distribution pattern and driving factors of soil and water loss in mountainous areas, taking Qianxi County as an example, we used GIS and InVEST model to quantitatively estimate the temporal and spatial variation characteristics of soil erosion in the study area, and analyzed the main driving factors of soil erosion through geographical detectors, so as to provide decision support for the coordinated development of regional social economy and ecological environment. The results show that:(1)the amount of soil erosion in 1990, 2000, 2010 and 2020 were 1.25×107 t, 1.41×107 t, 1.77×107 t and 2.00×107 t, respectively, showing a rising trend, and the spatial distribution pattern was high in the north and low in the south;(2)land use type was the most important driving force for soil erosion; industrial and mining land and unused land were regions with higher soil erosion risk; the effects of other factors from strong to weak were slope, soil type, vegetation coverage and rainfall;(3)the effects of interaction between factors on soil erosion were greater than that of single factor, and the interaction between land use type and other factors had the strongest effects on soil erosion. Based on the above analysis, we finally put forward the measures of soil erosion control: strengthening the ecological restoration of industrial and mining land and the ecological protection of unused land, afforestation to enhance the surface vegetation coverage, controlling the expansionscale of chestnut economic forest, restoring the undergrowth turf and returning farmland toforestland and grassland on slopping land with over 25°.