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	尼龙网方格沙障的风沙流颗粒分布特征
其他题名	Characteristic of Sand Flux Structure and Sand Particle Size Distribution Based on Nylon Net Checkerboard Barrier
	黎小娟 1; 李宁 2; 周智彬 1; 丁新原 3; 鲁晶晶 1; 李生宇1
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2016
卷号	30 期号:5 页码:128-134
中文摘要	为了探讨塔克拉玛干沙漠腹地风沙流结构特征及尼龙网方格沙障对风沙流颗粒的分异作用,于2015年4月2015年6月,选取裸沙地和沙障2种下垫面,利用集沙仪对地表风沙流进行观测,分析了尼龙网沙障对风沙流结构和沙粒粒径分布的分异过程。结果表明:(1)风沙流结构在裸沙地符合指数分布(y =321.025e~(-10.16x),R~2=0.94),在沙障前部和中部分别表现出象鼻效应特征和近似于倒置的象鼻;沙障的设置,明显减少了近地面(0~42cm)的输沙量。(2)在裸沙地,极细沙和粗粉沙输沙量在垂向分布上符合指数递减规律;极细粉沙、细粉沙和中粉沙的输沙量在下段呈指数递增分布,在上段呈指数递减分布,经过沙障后,近地面约0~32cm高度范围内沙粒的输沙量垂向分布特征发生了显著变化。(3)沙障的设置不仅改变了风沙流的水平分布,也改变了不同粒径沙粒的水平分布,其中细沙的水平分布变化最显著。
英文摘要	Sand flux structure,the distribution of sediment runoff in the vertical height,was the product of the combined effects including the mechanical composition of sand,the degree of sorting,the feature of near surface airflow,the air humidity,the underlying form,the structure of vegetation,and so on.It could directly characterize the movement of sand,analyze the situation of surface erosion and deposition,master the morphological development and evolution of aeolian landform.It played an important role in the theory and practice. Based on those,it was very necessary to carry out the characteristics of sand motion in the hinter land of Taklimakan desert.In order to reveal two-dimensional spatial distribution of the sand flow and the sand of different particle,bare sandy land and sand barriers were selected.Two kinds of sand collectors(one was set to observe sand flow in the vertical height,the other was set to observe sand flow in the horizontal direction) were installed to measure the features of sand flow movement.In-situ observation was performed from April 2015to June 2015.Then differentiation process between sand flux structure and sand particle size distribution and nylon net checkerboard barrier were researched.The results were as follows:(1)The sand flux structure exhibited an exponential decay distribution at the bare sandy land,took on unique effect of elephant nose in the front of the barrier and exhibited obsequent effect of elephant nose in the middle of the barrier. Sand-barrier obviously reduced the sand transport rates of the near-surface(0~42cm).(2)At the bare sandy land,the vertical mass flux profiles of the very fine sand and coarse silt groups exhibited exponential decay distribution,the vertical mass flux profiles of silt,fine silt and the very fine silt exhibited exponential increase distribution with appearing exponential decay distribution in the away-bed region.Going across the sand barrier,the vertical mass flux profiles of sand and the vertical distribution patterns of sand had changed in the near-bed region(0~32cm).(3)Sand barrier not only changed the spatial distribution of the sand flow,but also changed the spatial distribution of different size sand.All of those,the spatial distribution of fine sand had change the most.
中文关键词	尼龙网方格沙障 ; 风沙流结构 ; 塔克拉玛干沙漠 ; 沙粒粒径
英文关键词	nylon net checkerboard barrier sand flux structure Taklimakan desert sand particle size
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5824658
来源机构	中国科学院新疆生态与地理研究所 ; 北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234982
作者单位	1.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国; 2.新疆建设兵团水保监测总站, 乌鲁木齐, 新疆 830011, 中国; 3.北京师范大学资源学院, 北京 100049, 中国
推荐引用方式 GB/T 7714	黎小娟,李宁,周智彬,等. 尼龙网方格沙障的风沙流颗粒分布特征[J]. 中国科学院新疆生态与地理研究所, 北京师范大学,2016,30(5):128-134.
APA	黎小娟,李宁,周智彬,丁新原,鲁晶晶,&李生宇.(2016).尼龙网方格沙障的风沙流颗粒分布特征.水土保持学报,30(5),128-134.
MLA	黎小娟,et al."尼龙网方格沙障的风沙流颗粒分布特征".水土保持学报 30.5(2016):128-134.