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[1]LU Zhiqiang,WEI Xia,AN Kejian.Influence of Precipitation and Vegetation on Erosion Change Before and After Grain for Green Project in Puhe River Basin[J].Research of Soil and Water Conservation,2023,30(02):7-12,21.[doi:10.13869/j.cnki.rswc.2023.02.033]

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Influence of Precipitation and Vegetation on Erosion Change Before and After Grain for Green Project in Puhe River Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 02 Page number: 7-12,21 Column: Public date: 2023-03-10

Title:: Influence of Precipitation and Vegetation on Erosion Change Before and After Grain for Green Project in Puhe River Basin

Author(s):: LU Zhiqiang, WEI Xia, AN Kejian; (College of Earth Environmental Sciences, Lanzhou University, Lanzhou 730000, China)

Keywords:: soil erosion; Grain for Green Project; LMDI model; Puhe River Basin

CLC:: S157.1

DOI:: 10.13869/j.cnki.rswc.2023.02.033

Abstract:: In order to quantitatively evaluate the change characteristics of soil erosion and the effects of precipitation and vegetation on soil erosion in Puhe River Basin before and after Grain for Green Project, we used the revised universal soil loss equation(RUSLE) model to assess soil erosion in Puhe River Basin and analyzed its dynamic changes from 1990 to 2019. Combined with LMDI model, we studied the effects of vegetation and precipitation on soil erosion in this basin from 1990 to 2000, 2000 to 2010 and 2010 to 2019 at the pixel scale. The results show that: over the past 30 years, the erosion intensity of the basin was mainly micro and mild erosion, while the soil erosion area of medium and above levels tended to decrease gradually; the overall erosion situation of the basin continued to improve, the interaction between vegetation coverage and rainfall erosivity drove the dynamic development of soil erosion in the study area; before 2000, rainfall was the dominant factor affecting the change of soil erosion; with the implementation of the Grain for Green Project, the role of vegetation became more and more prominent. The research shows that the Grain for Green Project in Puhe River Basin has achieved remarkable results, which is an effective measure for erosion control and the vegetation restoration project should continue to be strengthened in the middle and upper reaches of this basin.

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Last Update: 2023-03-10