| Analysis of spatial characteristics of soil erosion in Qinba mountainous area of Shaanxi based on GIS |
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| DOI：10.7606/j.issn.1000-7601.2012.02.33 |
| Key Words: GIS USLE soil erosion Qinba mountainous area Ningqiang County |
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| Abstract: |
| Characteristics of soil erosion of Ningqiang County in Qinba mountainous area were studied to provide scientific basis for soil and water conservation and soil erosion control in this area. Data about land use types and vegetation coverage were obtained by interpreting remote sensing image, and DEM was obtained by processing topographic map data with GIS technology, and then soil erosion modulus was calculated through plugging these data into USLE model. The domination soil erosion types in study area were mild (47.015%), moderate (33.36%) and strong (12.53%), and serious soil erosion area was mainly distributed in the northeast of the study area which mainly included irrigated paddy field, irrigated filed, dryland and vegetable field. Soil erosion modulus and all erosion area of each erosion grade in Ningqiang County were successively estimated through USLE model combined with GIS and remote sense. The results of this study corresponded to the past monitoring programs according to the comparison with second adjustment results. |
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