干旱区生态环境知识资源中心

This paper analyzes and calculates the structure of wind-sand flow of perpendicular height ranges from 0 similar to 30 cm at different positions for the windward slopes on the southern edge of the Mu Us Desert. These results indicate that velocity and volume of sand movement increase correspondingly to the elevation on the windward slopes in this region. The roughness of surfaces increase from the foot of the slope to the top and the surface sand transport rate is an exponential function of the decrease of height of the dunes. Erosion is occurring at a more intense rate than deposition as slope gradients increase. This paper also finds that sand deposition is greater than erosion at slightly concave locations on windward slopes. There is a certain correlation between intensity of dune erosion and sand grain size. The changes of sand grain size from the foot of the slope is fine grained to more coarse sand, respectively.