[1]WEI Mengyao,ZHANG Zhuodong,LIU Yingna,et al.Characteristics of Soil Erosion in Guangxi Based on CSLE[J].Research of Soil and Water Conservation,2020,27(01):15-20.
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Characteristics of Soil Erosion in Guangxi Based on CSLE
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 01
Page number:
15-20
Column:
Public date:
2020-02-20
- Title:
- Characteristics of Soil Erosion in Guangxi Based on CSLE
- Keywords:
- soil erosion; karst; CSLE; land use; topography; Guangxi
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- Guangxi is one of the major regions with karst distribution, and the soil erosion in this region is very serious. According to the First National Water Census, we calculated and analyzed the characteristics of soil erosion in different land uses and topographies based on field erosion survey units and erosion plots. The results show that the forestland and cultivated land are the main land use types in Guangxi, the overall terrain is hilly and rough, and the erosion site is fragmentarily distributed in the area with an average slope length of 35.60 m and an average slope gradient of 18.49°; the spatial distribution of slope length and gradient is similar, decreasing from northwest to southeast. With the increase of slope gradient, the soil erosion modulus of each land use increases at first and then decreases, and the critical slope gradient is between 25°～40°. When the slope length is less than 70 meters, the soil erosion modulus increases with the slope length, and the influence of slope length on soil erosion is slightly larger than that of the slope gradient. The soil erosion intensity in Guangxi varies from mild to slight level. The soil erosion of the cultivated land is the most serious; especially the steep slope cropland above 15° has the biggest contribution to soil erosion in this region.
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Last Update:
2020-02-25