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 ~ 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 ~ 0.20mm to the range of 0.10 to 0.15mm.
Greening on the edge of desert is an effective way to prevent and control desertification. This paper studies the humidity characteristics of sand samples collected from the surface and interior of dunes in the southwestern edge of the Taklimakan Desert, whose geographic coordinates are 39°43’37” – 39°43’41” N, 78°43’02” – 78°43’09” E. The humidity of sand samples at vertical depths under five different surface positions of windward slope bottom, windward slope middle, windward slope top, leeward slope middle and leeward slope bottom was studied. On the surface of the sand at different locations and at the same depth under the surface, the sand humidity is greater closer to the bottom of the slope, for both windward slope and leeward slope. The humidity gradient values on the surface and at different depths on different positions of the dunes are obtained. Finally, recommendations are provided for effective ways to prevent desertification in the desert edge of Kashgar.
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