干旱区生态环境知识资源中心

The morphology of the natural sand in the southwest of Buguli desert, Xingjiang, China, has been studied to determine the sand-mass flux of the wind-sand flow, sand particle size distribution and morphology distribution. The results show that, when the average wind speed is 6.7m/ s 2 m high from the ground, averagely, about 98.1% of the winds drifting sands have the particle size ranging from 0.05mm to 0.15mm. Under the wind-sand flow state, the main sand shape is given priority to the rounded or subangular shapes, which account for 94.7 similar to 96.1%. With increasing height from 0 to 4 cm, the probability of finding rounded sands is getting smaller, and the size of sand particles with higher probability to be round is also getting smaller: from the range of 0.15 similar to 0.20mm to the range of 0.10 to 0.15mm.