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| Calculation of soil erosion modulus in the black soil region in northeastern China based on GIS |
| Sun Yu1, Hasi Eerdun 1, Du Huishi2 |
| 1.College of Resources Science and Technology, Beijing Normal University, 100875, Beijing, China; 2.College of Tourism and Geographical Science, Jilin Normal University, 136000, Siping, Jilin, China |
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Abstract In order to monitor and evaluate the status of soil erosion in the black soil region of northeastern China, we used GIS technology, Chinese Soil Loss Equation (CSLE) and WorldView remote sensing images with a spatial resolution of 0.5 m to estimate soil erosion modulus in Gucheng Watershed of Keshan County in Heilongjiang Province. We revised the calculation method of biological measures to make the formula more applicable to the study area. Results demonstrate that soil erosion intensity in the studied region is mild, and erosion mainly takes place in northwestern, northeastern and southern central parts of the study area. When the slope is less than 20°, soil erosion seldom takes place; when exceeding the threshold of 20°, the greater the slope is, the more serious the soil erosion intensity is. In addition, slope can influence the erosion intensity indirectly with tillage measures. There are also several factors such as water conservation measures and biological measures that play important roles in the distribution of eroded area and intensity of erosion. The results are of important significance for measuring soil loss, reducing river sediment, improving and recovering fertility in black soil regions.
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Received: 15 April 2014
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