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[1]SHI Cai-ning,CHANG Qing-rui,WANG Chun-mei.Evaluation on Soil Erosion Intensity Grade in Yan’an Area Based on GIS[J].Research of Soil and Water Conservation,2010,17(03):28-31.

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Evaluation on Soil Erosion Intensity Grade in Yan’an Area Based on GIS

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 03 Page number: 28-31 Column: Public date: 2010-06-20

Title:: Evaluation on Soil Erosion Intensity Grade in Yan’an Area Based on GIS

Author(s):: SHI Cai-ning¹, CHANG Qing-rui¹, WANG Chun-mei²; 1. College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: soil Erosion; GIS; slope scaling; comprehensive erosion index; Yan’an

CLC:: S157.1;TP79

DOI:: -

Abstract:: According to MWR (Minister of Water Resources) standard of soil erosion grading and based on GIS, this article evaluated soil erosion intensity grade, taking Yan’an as an example, and analyzed the differences of soil erosion intensity grades among different counties of Yan’an in 2006. Gradient reduction and its influence on soil erosion evaluation results were studied quantitatively, and the result is compared with soil erosion intensity in 2002. Among all the counties, Wuqi county had the most intensive soil erosion, while Huanglong county is the least. Compared with soil erosion in 2002, there was a rise in soil erosion intensity in nearly 68% area of Yan’an after gradient transform was taken into account. There was a decrease in area in weak and severe magnitude erosion whereas an increase in area in the other soil erosion grades in Yan’an.

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