阿拉尔-和田沙漠公路机械防沙体系内风沙沉积的粒度特征

发布时间：2018-03-06 20:31

本文选题：阿和公路　切入点：防沙体系　出处：《干旱区资源与环境》2014年06期 　论文类型：期刊论文

【摘要】：对阿拉尔-和田沙漠公路沿线机械防沙体系内外地表风沙沉积物进行了系统采样,运用沉积物的粒度分析方法,以流沙区为对照,对比分析了沙漠公路机械防沙体系中阻沙区和固沙区内风沙沉积物的粒度特征。研究发现:(1)从流沙区到阻沙区,再到固沙区,风沙沉积物的粗砂、中砂含量逐渐降低,极细砂、粉砂含量逐渐增加,阻沙区内风沙沉积物的平均粒径减小了31.0%,固沙区内风沙沉积物的平均粒径减小了47.2%。(2)流沙区、阻沙区和固沙区内蠕-跃截点的平均值分别为1.296Φ、1.647Φ、2.188Φ,跃-悬截点的平均值分别为3.893Φ、4.089Φ、4.292Φ,各运动组分的截点均向细端偏移,并且各运动组分的含量也发生了变化,阻沙区和固沙区内蠕移组分含量分别降低了2.378%、5.837%,悬移组分含量分别增加了4.26%、4.294%。(3)固沙区沙粒的分选性最好,偏度SK的平均值为-0.059,表现为近对称,峰态KG为0.939-0.987,表现为中等峰态。
[Abstract]:The surface aeolian sediment in and out of the mechanical sand control system along the Alar and Hotan desert highway was systematically sampled. The grain size analysis method of the sediment was used to compare with the quicksand area. The grain size characteristics of aeolian sediment in sand arresting area and sand fixation area in sand control system of desert highway are compared and analyzed. It is found that the coarse sand content of aeolian sediment decreases gradually and the very fine sand content decreases from quicksand area to sand blocking area and then to sand fixation area. The content of silt increased gradually, the mean particle size of aeolian sediment decreased by 31.0 and the mean particle size of aeolian sediment decreased by 47.2. The mean values of vermicular and jump intercept points are 1.296 桅 / 1.647 桅 / 2.188 桅 and 3.893 桅 / 4.089 桅 / 4.292 桅, respectively. The intercept points of each moving component are shifted to the fine end, and the contents of the moving components have also changed. The content of compacted moving components in sand blocking area and sand fixation area decreased by 2.37887 and 5.837, respectively, and the content of suspended component increased 4.2644.294.f.) the average value of deviation SK was -0.059, which was nearly symmetrical, and the peak KG was 0.939-0.987, which showed the medium peak state, and the content of suspended component was increased by 4.26 and 4.2940.294. the average value of deviation SK was -0.059, and the peak KG was 0.939-0.987.
【作者单位】：中国科学院新疆生态与地理研究所;中国科学院大学;和田公路管理局;新疆气候中心;
【基金】：新疆维吾尔自治区重大科技专项课题(201130106-3) 新疆维吾尔自治区科技支疆项目计划(201291106) 中国科学院知识创新工程青年方向项目(KZCX2-YW-QN-316) 新疆维吾尔自治区交通科研项目(2010-10)资助
【分类号】：U418

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