Calculation of soil erosion modulus in the black soil region in northeastern China based on GIS
Sun Yu, Hasi Eerdun, Du Huishi
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
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.
孙禹1, 哈斯额尔敦1, 杜会石2. 基于GIS 的东北黑土区土壤侵蚀模数计算[J]. 中国水土保持科学, 2015, 13(1): 1-7.
Sun Yu, Hasi Eerdun, Du Huishi. Calculation of soil erosion modulus in the black soil region in northeastern China based on GIS. SSWCC, 2015, 13(1): 1-7.
2015, Vol. 13 
