干旱区生态环境知识资源中心(Arid): 3种低立式沙障内表层沉积物粒度特征研究

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	3种低立式沙障内表层沉积物粒度特征研究
其他题名	Grain size characteristics of surface sediments in three low vertical sand barriers
	祁帅; 汪季; 党晓宏; 魏亚娟; 丁奋谦
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2021
卷号	38 期号:3 页码:1001-4675
中文摘要	以库布齐沙漠兴巴高速南铺设3 a的3种(PLA沙障、沙柳沙障、HDPE沙障)同种规格不同材料沙障为研究对象,通过采集沙障内表层0~2 cm沉积物样品,利用激光粒度仪测定样品机械组成,分析了平均粒径、标准偏差、偏度、峰态和分形维数等参数。结果表明:(1)以中、细砂为主,其含量约为77.83%~98.00%,黏粒和粉粒的含量均不超过5%;沙丘迎风坡坡底PLA和HDPE沙障内表现为轻度风蚀,颗粒粒径偏粗;沙柳沙障自坡底到坡顶,障格内粒径逐渐增大,在坡顶处发生蚀积转换。(2)整体上沙障内沉积物分选性较差,偏度向正偏或负偏发展,峰态向尖窄发展,分形维数在1.94~2.20,优势粒级向细砂转变。(3)不同类型沙障对沉积物的影响具有一定差异性,HDPE沙障和PLA沙障内沉积颗粒分布更为广泛,而沙柳沙障则相对集中,且都趋于细化;对土壤颗粒组成优化表现为HDPE沙障>沙柳沙障>PLA沙障。
英文摘要	This research examines the inner surface (0-2 cm) of three types of sand barriers (PLA, Salix, HDPE) of the same specifications that have been laid for three years in the south of Xingba Expressway in the Kubuqi Desert. The mechanical composition of the samples was measured using a laser particle size analyzer, and parameters, such as average particle size, standard deviation, skewness, kurtosis, and fractal dimension, were analyzed. The study area was dominated by medium and fine sand (77.83%-98.00%), and the content of clay and powder particles did not exceed 5%. The PLA and HDPE sand barriers at the bottom of the windward slope of the dunes were manifested by mild wind erosion, and the particle size was relatively coarse. However, from the bottom to the top of the slope, the size of the sand willow sand barrier gradually increased, and there was a change from sedimentation to wind erosion at the top of the slope. Overall, the sediments in the sand barrier were poorly sorted, the skewness developed toward positive or negative deviation, kurtosis developed toward sharpness, the fractal dimension was 1.94-2.20, and the dominant grain size changed to fine sand. The impact of different types of sand barriers on sediments was different. The distribution of sediment particles in the HDPE and PLA sand barriers was more extensive, while the sand willow sand barrier was relatively concentrated and refined. The optimization of particle composition was HDPE> Salix> PLA sand barrier.
中文关键词	低立式沙障 ; 迎风坡 ; 粒度特征 ; 分形维数 ; 库布齐沙漠
英文关键词	low vertical sand barrier windward slope granularity characteristics fractal dimension Kubuqi Desert
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Environmental Sciences & Ecology
CSCD记录号	CSCD:6983652
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365069
作者单位	祁帅, 内蒙古农业大学沙漠治理学院, 中央与地方共建风沙物理重点实验室, 呼和浩特, 内蒙古 010018, 中国.; 魏亚娟, 内蒙古农业大学沙漠治理学院, 中央与地方共建风沙物理重点实验室, 呼和浩特, 内蒙古 010018, 中国.; 丁奋谦, 内蒙古农业大学沙漠治理学院, 中央与地方共建风沙物理重点实验室, 呼和浩特, 内蒙古 010018, 中国.; 汪季, 内蒙古农业大学沙漠治理学院;;内蒙古杭锦荒漠生态系统国家定位观测研究站, 中央与地方共建风沙物理重点实验室;;内蒙古杭锦荒漠生态系统国家定位观测研究站, 呼和浩特;;鄂尔多斯, 内蒙古;;内蒙古 010018;;017400, 中国.; 党晓宏, 内蒙古农业大学沙漠治理学院;;内蒙古杭锦荒漠生态系统国家定位观测研究站, 中央与地方共建风沙物理重点实验室;;内蒙古杭锦荒漠生态系统国家定位观测研究站, 呼和浩特;;鄂尔多斯, 内蒙古;;内蒙古 010018;;017400, 中国.
推荐引用方式 GB/T 7714	祁帅,汪季,党晓宏,等. 3种低立式沙障内表层沉积物粒度特征研究[J]. 内蒙古农业大学,2021,38(3):1001-4675.
APA	祁帅,汪季,党晓宏,魏亚娟,&丁奋谦.(2021).3种低立式沙障内表层沉积物粒度特征研究.干旱区研究,38(3),1001-4675.
MLA	祁帅,et al."3种低立式沙障内表层沉积物粒度特征研究".干旱区研究 38.3(2021):1001-4675.