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流动沙漠地形起伏区尼龙网方格沙障破损程度的空间分异

DOI: 10.13577/j.jnd.2015.0211, PP. 81-88

Keywords: 尼龙网方格沙障,破损类型,破损程度值,空间分异

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Abstract:

在塔克拉玛干沙漠油田公路K287km处,对设置在纵向复合沙垄区次级新月形沙丘上不同地貌部位的尼龙网方格沙障破损状况进行了调查研究,并对破损程度进行了综合评价.研究结果表明,(1)平沙地上的尼龙网方格沙障破损类型相对单一,以半埋型式为主;流动沙丘上的尼龙网方格沙障破损类型多样,而且不同地貌部位的破损类型不同.(2)沙丘个体及不同地貌部位的破损程度值远远高于平沙地,破损程度值排序为迎风坡脚>迎风坡中部>沙丘两翼>落沙坡>迎风坡中上部>丘顶.(3)沙丘不同地貌部位尼龙网方格沙障受损的空间分异主要与沙丘对近地表风流场的强烈扰动有关.(4)尼龙网方格沙障更适宜布设在平坦的地形,提高尼龙网方格沙障对地形起伏适应性的关键在于其布设模式以及布设配件的改进.

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