Journal of Food, Agriculture and Environment

Study on the wind-sand flow structure of windward slope in the Mu Us Desert, China

Author(s):

Yanfeng Bao ^{1, 2}*, Guodong Ding ^{1, 2*}, Bin Wu ^{1, 2}, Yuqing Zhang ^{1, 2}, Wenjun Liang ^{1, 2}, Guanglei Gao ^{1, 2}, Bao Wei ^{1, 2}, Yu Ren ³

Recieved Date: 2013-01-02, Accepted Date: 2013-04-30

Abstract:

This paper analyzes and calculates the structure of wind-sand flow of perpendicular height ranges from 0~30 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. 

Keywords:

The wind-sand flow structure, roughness, sand transporting rate, fitting of curves, particle size analysis

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 2
Category: Environment
Pages: 1449-1454

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