[1]HE Weican,ZHAO Shangmin,WANG Ruibo,et al.Research on Soil Erosion Risk Based on GIS and CSLE in Shanxi Province[J].Research of Soil and Water Conservation,2016,23(03):58-64.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 03
Page number:
58-64
Column:
Public date:
2016-06-28
- Title:
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Research on Soil Erosion Risk Based on GIS and CSLE in Shanxi Province
- Author(s):
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HE Weican1,2, ZHAO Shangmin1, WANG Ruibo2, CHENG Weiming2,3
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1. College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
2. State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
3. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China
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- Keywords:
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soil erosion risk; CSLE(Chinese Soil Loss Equation); GIS; geographically weighted regression; administrative units at multi-levels
- CLC:
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P208;S157
- DOI:
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- Abstract:
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We selected the Shanxi Province as the research region. Based on the Chinese Soil Loss Equation(CSLE), remote sensing and GIS spatial analysis technology, the each soil erosion factor in CSLE model was calculated through reasonable data sources and computing methods. Then, the erosion risk distribution characteristics of administrative units at multi-levels in Shanxi Province were assessed according to the classification criteria of soil erosion intensities (SL190—2007) in the period from 2000 to 2010. To determine the regression coefficients of the erosion factors in relation to erosion modules, GWR (Geographically Weighted Regression) was carried out. The results showed that: (1) the average annual amount of soil erosion in Shanxi Province from was about 3.58×108t, the average erosion modules was 2 287 t/(km2·a). About 48% of the total area was found to present an erosion risk area if a surface erosion grade higher than tolerable was assumed to be equivalent to erosion risk; (2) among the 11 prefecture-level cities, medium erosion was observed in Lüliang City, Linfen City, Yangquan City and Xinzhou City, and slightly erosion was found in Changzhi City, Jinzhong City, Jincheng City, Taiyuan City, Datong City, Yuncheng City, the 106 counties of Shanxi Province can be classified as tolerable erosion, slightly erosion, medium erosion and strong erosion.There are 14 counties with tolerable erosion, 61 counties with slightly erosion, 27 counties with medium erosion and 4 counties with strong erosion; (3) it is found that the topographic factor has the highest contribution rate to the soil erosion modules, while the highest contribution rates of the erosion factors to the erosion modules and the largest values of the factors are not located in the same place.