干旱区生态环境知识资源中心(Arid): 策勒绿洲一沙漠过渡带风沙流挟沙粒度的垂直分异

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	策勒绿洲一沙漠过渡带风沙流挟沙粒度的垂直分异
其他题名	Vertical distribution of grain size in aeolian flow in Cele oasisdesert ecotone
	王翠 1; 雷加强1 ; 李生宇2 ; 毛东雷 1; 周杰 1; 再努拉·热合木吐拉 1
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2014
卷号	37 期号:2 页码:230-238
中文摘要	在策勒绿洲一沙漠过渡带选取流动沙地、半流动沙地两个典型下垫面,釆集下垫面地表0 ~ 1 cm沙样,利用梯度集沙仪收集风风沙流中垂直高度层中1?20 cm的沙通量,利用mastersizer 2000分析所收集沙样的粒度。结果表明研究区风沙流挟沙粒度的垂直分布特征为:沙粒平均粒径随高度增加而减小,风沙流中沙粒的平均粒径小于床面沙粒平均粒径。其中粉沙含量随着高度的增加,其相对含量呈现幂函数增加,极细沙和细沙含量随高度的增加呈幂函数规律递减。风沙流中平均粒径(phi)值在3.58~3.81;分选系数集中在0.46-0.55,分选性较好;偏度值变化范围为-0.006~0.1,峰度变化值在0.94~0.96。半流动沙地风沙流中平均粒径小于流动沙地,分选性较好。平均粒径(phi)与分选系数、峰度和偏度均呈正相关,分选系数与偏度、峰态间呈现正相关,峰态与偏态之间呈现正相关。研究区沙粒主要以细沙、极细沙和粉沙为主,分选性较好,沙粒粒径分布符合正态。流动沙地较半流动沙地风蚀程度大,地表沙粒粒径粗。策勒地区地表风沙来源主要为风成沙,沙粒运动方式以跃移质为主,悬移质次之。
英文摘要	Selecting two different underlying surface including mobile sandland and semi-mobile sandland in Cele oasis-desert ectone, Xinjiang, China, via gathering sand grain in 0-1 cm depth on sand bed surface and collecting vertical sand transportation by gradient sand trap in the height of 0-20 cm when it has wind and dust activity,then measureing grain size by using of mastersizer2000,and all of sand granularity parameters were calculated by Folk &Ward ’s equation as well as its judgement standard. The result indicates that the sand bed grain size is larger than the vertical’ s in wind-sand flux,and the mean sand grain size decreased with the height. In vertical layer of mobile sandland, its mean silt content is about 28.67%,and its very fine sand and fine sand content accout for 62.31% and 8.94% respectively, and medium sand is the least, its content is only 0.08%. The same measuement was been conducted in semi-mobile sandland,the result displays that silt content of semi-mobile sandland is much more than mobile sandland, it is about 32.25%,and very fine sand content decreased to 58.26% correspondingly. Above sand bed surface,milt increase with the vertical height. Adversly,the very fine sand,fine sand and the medium sand decrease with vertical height. Both the mobile sandland and semi-mobile sandland,its grain size distribution displays the same pattern in vertical layers. Sand grain size percentage grows in power function when its size is less than 0.08 mm,and its percentage decreases when its size is larger than 0.08 mm. The mean grain size in aerolian sand transport displays negative correlation with its sorting efficient,skewness and kurtosis,and its sorting efficient displays positive correlation with its skewness and kurtosis. The underlying surface grain is mainly consisted by silt, very fine sand and fine sand, its sorting efficient is high. From mobile sandland to fixed sandland,the wind erosion degree eases,so the mean grain size decreases. The deposition of the study area is derived from wind-blown sand,and the sand grain transportation mainly by saltating and suspending. All in all,the grain size is tiny in Cele oasis-desert ecotone, where is easy to be the sand-storm source, so it’ s necessary to prevent and govern local sand movement.
中文关键词	粒度垂直分异 ; 不同粒径组 ; 风沙环境 ; 策勒绿洲一沙漠过渡带
英文关键词	vertical distribution of grain size different grain size group wind-blown sand environment Cele oasis-desert ecotone
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:5124264
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231106
作者单位	1.中国科学院新疆生态与地理研究所, 新疆策勒荒漠草地生态系统国家野外科学观测研究站, 乌鲁木齐, 新疆 830011, 中国; 2.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	王翠,雷加强,李生宇,等. 策勒绿洲一沙漠过渡带风沙流挟沙粒度的垂直分异[J]. 中国科学院新疆生态与地理研究所,2014,37(2):230-238.
APA	王翠,雷加强,李生宇,毛东雷,周杰,&再努拉·热合木吐拉.(2014).策勒绿洲一沙漠过渡带风沙流挟沙粒度的垂直分异.干旱区地理,37(2),230-238.
MLA	王翠,et al."策勒绿洲一沙漠过渡带风沙流挟沙粒度的垂直分异".干旱区地理 37.2(2014):230-238.