干旱区生态环境知识资源中心(Arid): 古尔班通古特沙漠南部风沙土粒度分布的空间异质性

Arid

	古尔班通古特沙漠南部风沙土粒度分布的空间异质性
其他题名	Spatial heterogeneity for grain size distribution of eolian sand soil in the southern Gurbantunggut Desert
	钱亦兵 1; 吴兆宁 2; 杨海峰 1; 蒋超 1; 玉素甫艾力 2
ISSN	1000-6060
出版年	2009
卷号	32 期号:5 页码:655-661
中文摘要	系统采集古尔班通古特沙漠南部典型地段纵向沙垄和垄间地浅层风沙土(0～30 cm)样184件,运用常规粒度分析和地统计分析方法研究了古尔班通古特沙漠南部沙垄不同部位风沙土粒度组成、分布特征及空间变异.结果显示:风沙土机械组成的优势粒级是细沙和极细沙,不同地貌部位粒级组成差异明显.粘土和粉沙的含量为垄间地高于沙垄,背风坡高于迎风坡和垄顶.极细沙和细沙的含量是迎风坡最高,垄顶最低.中沙、粗沙和极粗沙的含量则是垄间地低于沙垄,垄顶最高.风沙土粗物质粒径phi1和平均粒径Mz从垄间地背风坡迎风坡垄顶均由细变粗,分选系数sigma则由差变好.同时,phi1、Mz和sigma具有中等-强空间自相关性,其空间相关范围(变程)大小顺序为phi1
英文摘要	184 samples of eolian sand soil from 0 -30cm layer across two longitudinal dunes and interdune areas in the southern Gurbantunggut Desert were systemically collected and measured.The grain size composition,distribution characteristics and spatial variation of eolian sand soil at different geomorphologic positions across the longitudinal dunes and interdune areas in the southern Gurbantunggut Desert were studied by means of conventional grain size analysis and geostatistical method.The results show that the dominant grain sizes are fine and very fine sands and the differences of grain size compositions between the distinct geomorphological positions are significant.The contents of clay and silt at the interdune areas are higher than that at the dunes,and that at the leeward slopes are higher than that on the windward slopes and the crests.The contents of very fine and fine sands on the windward slopes are the highest and that on the crests are the lowest.The contents of medium,coarse and very coarse sands on the interdune lands are lower than that on the dunes,and the crests are the highest.The coarser sizes(phi1) and mean sizes(Mz) for eolian sand soil all varied from fine to coarse sizes with interdune arealeeward slopewind-ward slopecrest.The sorting(sigma) was poorly to well sorted.The coefficients of variation for every grain size parameters presents that:on the crests they are the smallest and that on the interdune areas are the largest,and the skewness and the kurtosis values between the crests and slopes are different,reflecting that the grain size parameters is closely related to the wind direction and strength,dynamic processes of the dunes,and vegetation status. The results of geostatistical analysis reveal thatphi1,Mz andsigmavalues are moderately to strongly spatial autocorrelation. The spatially correlative range ofphi1 values is smaller and that ofsigmarvalues is medium,and that of Mz values is the largest.The spatial variation of these grain size parameters are significantly affected by the longitudinal dune’s landform. They have a varying gradient of zones - shaped distribution from the crests toward sloped bottoms and the gradient values on the leeward slopes are larger than that on the windward slopes.
中文关键词	风沙土 ; 粒度分布 ; 空间变异 ; 地统计分析 ; 纵向沙垄 ; 古尔班通古特沙漠南部
英文关键词	Eolian sand soil grain size distribution spatial variation geostatistical analysis longitudinal dune the southern Gurbantunggut Desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GENETICS HEREDITY
WOS研究方向	Genetics & Heredity
CSCD记录号	CSCD:3684585
来源机构	中国科学院新疆生态与地理研究所 ; 新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223566
作者单位	1.中国科学院新疆生态与地理研究所, 中科院绿洲生态与荒漠环境重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.新疆大学地质与勘查工程学院, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	钱亦兵,吴兆宁,杨海峰,等. 古尔班通古特沙漠南部风沙土粒度分布的空间异质性[J]. 中国科学院新疆生态与地理研究所, 新疆大学,2009,32(5):655-661.
APA	钱亦兵,吴兆宁,杨海峰,蒋超,&玉素甫艾力.(2009).古尔班通古特沙漠南部风沙土粒度分布的空间异质性.,32(5),655-661.
MLA	钱亦兵,et al."古尔班通古特沙漠南部风沙土粒度分布的空间异质性".32.5(2009):655-661.