干旱区生态环境知识资源中心

In Inner Mongolia, soil wind erosion is a serious environmental problem. The aim of the study was to develop an estimation model to analyze the spatial and temporal changes of soil wind erosion during 1985-2011 based on geographic information system and remote sensing. The results showed that wind erosion was widely distributed in Inner Mongolia with an area of approximately 95 x 10(4) km(2). During 1985-2011, wind erosion has deteriorated over the entire region of Inner Mongolia, which was indicated by enlarged zones of erosion at severe and intensive grades. There was a significant difference in change intensity among different plant types that zones occupied by barren or sparsely vegetation showed the severest deterioration while the wind erosion of cropland showed a slight improvement in wind erosion. In addition, a significantly negative relation was noted between change intensity of wind erosion and vegetation coverage. Furthermore, the change rate of wind erosion was negatively correlated with the number of days (wind velocity a parts per thousand yen6 m/s). The relationships between soil types and change intensity differed with the surface distributions of sandy, loamy and clayey soil with particle sizes of 0-1 cm. The soil type of haplic luvisols showed the strongest resistance to wind erosion. The results have certain significance for understanding the mechanism and change process of wind erosion and can provide a scientific basis for the prevention of wind erosion in Inner Mongolia.