公路两侧沙丘粒度特征分析——以榆商高速神木县锦界镇路段为例
发布时间：2018-10-09 12:56
【摘要】：选取榆商高速神木县锦界镇路段两侧紧邻公路的沙丘和距离公路较远未经人为扰动的原始沙丘,采集沙丘表层沉积物进行粒度特征分析.结果表明,S20高速公路锦界镇路段两侧沙丘以中沙和粗沙为主,其次为细沙,极粗沙和粉沙含量都很少.公路西北侧沙丘平均粒径略大于东南侧,分选系数均较好,两侧沙丘的偏度均为负偏,峰度主要为中等型.公路建设改变了局地近地表气流发展,使得高速路两侧风速增大,并且呈现从西北向东南风速逐渐减小的规律,进而导致两侧沙丘表层沉积物粒径分布出现明显差异.
[Abstract]:The sand dunes adjacent to the highway and the original dunes which are far away from the highway in Jinjie Town of Shenmu County are selected and the surface sediment of the sand dunes is collected to analyze the granularity characteristics of the sand dunes. The results show that the sand dunes are mainly medium sand and coarse sand, followed by fine sand, and the content of extremely coarse sand and silt is very little. The average diameter of the sand dunes in the west and north side of the highway is slightly larger than that in the southeast side, and the sorting coefficient is better. The deviation of the sand dunes on both sides is all negative, and the kurtosis is mainly of the medium type. The highway construction changes the local near surface air flow development, increases the wind speed on both sides of the highway, and gradually reduces the wind speed from northwest to southeast, which leads to the obvious difference in the grain size distribution of surface sediment on both sides of sand dunes.
【作者单位】： 陕西师范大学旅游与环境学院;中国科学院寒区旱区环境与工程研究所中国科学院沙漠与沙漠化重点实验室;内蒙古师范大学蒙古高原环境与全球变化实验室;
【基金】：中央高校基本科研业务费专项资金资助项目(GK201604011)
【分类号】：U418.56
，
本文编号：2259415
[Abstract]:The sand dunes adjacent to the highway and the original dunes which are far away from the highway in Jinjie Town of Shenmu County are selected and the surface sediment of the sand dunes is collected to analyze the granularity characteristics of the sand dunes. The results show that the sand dunes are mainly medium sand and coarse sand, followed by fine sand, and the content of extremely coarse sand and silt is very little. The average diameter of the sand dunes in the west and north side of the highway is slightly larger than that in the southeast side, and the sorting coefficient is better. The deviation of the sand dunes on both sides is all negative, and the kurtosis is mainly of the medium type. The highway construction changes the local near surface air flow development, increases the wind speed on both sides of the highway, and gradually reduces the wind speed from northwest to southeast, which leads to the obvious difference in the grain size distribution of surface sediment on both sides of sand dunes.
【作者单位】： 陕西师范大学旅游与环境学院;中国科学院寒区旱区环境与工程研究所中国科学院沙漠与沙漠化重点实验室;内蒙古师范大学蒙古高原环境与全球变化实验室;
【基金】：中央高校基本科研业务费专项资金资助项目(GK201604011)
【分类号】：U418.56
，
本文编号：2259415
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