关键词: 半隐蔽格状沙障, 粒度, 沉积特征, 塔克拉玛干沙漠

Abstract:

Sand samples, collected from both nylon semi-buried checkerboard and cement semi-buried checkerboard in the center of Taklimakan Desert, are analyzed with grain-size characteristic parameters, mean grain-size to standard deviation scatter diagram and accumulative probability diagram. The results show that, first, the fine grain-size sands locate in the center of cement semi-buried checkerboard other than in the center of nylon semi-buried checkerboard, largely because of differential air flow in checkerboard; the accumulative probability diagram indicates that the wind forces in cement semi-buried checkerboard are more complex than that in the nylon checkerboard. And big grain-size sands play an important role in the grain-size characteristic parameters. Last, it is obviously that fine grain-size sands are affected by wind force.

Key words: semi-buried checkerboard sand-barriers, grain-size, sediment character