干旱区生态环境知识资源中心(Arid): 塔克拉玛干沙漠腹地复合纵向沙垄间地沙丘空间分形及稳定性

Arid

	塔克拉玛干沙漠腹地复合纵向沙垄间地沙丘空间分形及稳定性
其他题名	Fractality and Stability of Sand Dunes in Lowland among Composite Longitudinal Ridges in the Central Taklimakan Desert
	王宁波 1; 谷峰 2; 李生宇1 ; 王海峰 1; 徐新文1 ; 雷加强1 ; 张忠良 2
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2014
卷号	31 期号:1 页码:163-168
中文摘要	塔克拉玛干沙漠的大地貌格局是高大复合沙垄和宽广垄间地相间分布,而垄间地是研究简单沙丘发育过. 程的良好试验场地。基于Google Earth影像,以分形理论为基础,对塔克拉玛干沙漠腹地复合纵向沙垄区垄间地上覆沙丘在主导风方向上的分形特征进行了分析,结果表明:①垄间地沙丘形状指数(面积-周长关系)的标度一频度双对数关系非常显著,分形关系客观存在,并且不受统计时所用标度的影响;②垄间地各类沙丘的分维值存在差异,其中,饼状沙堆和沙片分维值最大(1.337),新月形沙丘次之(1.170),简单线性沙丘最小(1.087);③垄间地沙丘分维值的空间差异较大,在1.187~1.656,其分维数:背风坡脚(1.24) <垄间地中部(1.40) <迎风坡脚(1.50),变异系数为0.106;④垄间地沙丘稳定性指数与分维值的空间分布相反,即背风坡脚(0.26) >垄间地中部(0.16) >迎风坡脚(0.10);⑤垄间地沙丘分维值空间差异主要与沙丘发育程度有关,其中,风信是动力基础,沙源是物质基础。在流动沙漠,沙丘分形维数可以作为反映其风沙环境特征的定量指标。
英文摘要	The distribution of composite longitudinal ridges alternating with inter-dune corridors is the large-scale morphological pattern in the Taklimakan Desert, where almost all the types of dunes are distributed. Inter-dune corridors are the optimal experiment sites to study the development process of sand dunes. Based on the Google Earth images, this paper is to investigate the fractal characteristics of dunes along the local prevailing wind direction in the Taklimakan Desert. Some conclusions are as follows :① There was a significant double logarithmic relationship between size and frequency of dune shape index (floorage-perimeter relationship), which proved that the sand dunes in the inter-dune corridor alternating with the composite longitudinal ridges had the fractal characteristics independent of scales used in statistics ;② Sand dunes in the inter-dune corridors alternating with the composite longitudinal ridges had different fractal dimensions, the fractal dimension of pie-shaped dunes was the highest (1.337), it was moderate (1.170) for the barchans and the lowest (1.087) for the simple linear dunes ;③ The spatial difference of the fractal dimension of sand dunes alternating with the composite longitudinal ridges was high and varied in a range of 1.187 - 1.656, and the fractal dimension was in an order of leeward slope (1.24) < central ridge (1.40) < windward slope (1.50), and the coefficient of variation was 0. 106;④ The spatial distribution of dune stability index was opposite to the dune fractal dimension in the inter-dune corridor, that is in an order of leeward slope (0. 26) > central ridge (0. 16) > windward slope (0. 10);⑤ The spatial difference of dune fractal dimension was related to the development level of sand dunes. Fractal dimension of dunes could be used as an integrated quantitative index to evaluate aeolian environment in mobile desert.
中文关键词	沙丘 ; 垄间地 ; 分形维数 ; 稳定性指数 ; 塔克拉玛干沙漠
英文关键词	sand dune inter-dune corridor stability index fractal dimension Taklimakan Desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5042287
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/2XILL650/231150
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.中国石油天然气股份有限公司塔里木油田分公司, 库尔勒, 新疆 841000, 中国
推荐引用方式 GB/T 7714	王宁波,谷峰,李生宇,等. 塔克拉玛干沙漠腹地复合纵向沙垄间地沙丘空间分形及稳定性[J]. 中国科学院新疆生态与地理研究所,2014,31(1):163-168.
APA	王宁波.,谷峰.,李生宇.,王海峰.,徐新文.,...&张忠良.(2014).塔克拉玛干沙漠腹地复合纵向沙垄间地沙丘空间分形及稳定性.干旱区研究,31(1),163-168.
MLA	王宁波,et al."塔克拉玛干沙漠腹地复合纵向沙垄间地沙丘空间分形及稳定性".干旱区研究 31.1(2014):163-168.