干旱区生态环境知识资源中心(Arid): 新疆策勒不同荒漠化程度下地表沉积物粒度及分形特征

Arid

	新疆策勒不同荒漠化程度下地表沉积物粒度及分形特征
其他题名	Grain size and fractal characteristics of surface sediments under different desertification degrees in Cele, Xinjiang
	苏松领; 毛东雷; 赵枫; 曹永香; 朱文煜; 徐佳瑞
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2021
卷号	35 期号:11 页码:127-134
中文摘要	粒度分析在区分沉积环境、判定物质输运方式、判别水动力条件和分析粒径趋势等方面具有重要作用。在新疆策勒不同荒漠化程度下流动沙地、半固定沙地、固定沙地、绿洲四个典型下垫面,采取表面沙物质进行粒度分析,探讨不同荒漠化程度下垫面表面沙物质粒度特征存在的空间差异及其原因。结果表明:四种不同荒漠化程度下垫面表面沙物质平均粒径平均值由大到小依次为流动沙地、半固定沙地、固定沙地、绿洲土壤,分别为132.05、89.80、66.81、58.90mum,分选系数平均值由大到小依次为绿洲土壤、流动沙地、固定沙地、半固定沙地,分别为2.10、1.75、1.64、1.53,粒径分形维数平均值由大到小依次为绿洲土壤、固定沙地、半固定沙地、流动沙地,分别为2.13、1.76、1.65、1.54,随着沙粒的由粗到细,分形程度呈现变好的趋势。流动沙地、半固定沙地、固定沙地表面沙物质偏度均为对称,峰态均属于常峰态,绿洲土壤沙物质偏度属于细偏,峰态属于常-窄峰态,不同荒漠化程度下垫面除流动沙地表面沙物质粒径分形维数与平均粒径无显著相关外,其余均呈显著负相关,沙物质分形维数与偏度值均呈显著负相关,与分选系数、峰态值均呈正相关。四个下垫面除固定沙地和绿洲土壤表面沙物质粒径分形维数与极粗粉沙呈显著负相关(p<0.05)外,与粘粒、粉沙粒均呈显著(极显著)正相关,与沙粒中极细沙、细沙含量呈显著负相关。沙物质的来源、植被覆盖度及风力等均是导致不同荒漠化程度下地表沉积物粒度及分形差异的主要原因。
英文摘要	Particle size analysis plays an important role in distinguishing sedimentary environments, determining material transport modes, identifying hydrodynamic conditions and analyzing particle size trends. Based on the four typical underlying surfaces of mobile sandy land, semi-fixed sandy land, fixed sandy land and oasis under different desertification degrees in Cele, Xinjiang, grain size characteristics of the surface sand materials were analyzed to explore the spatial differences and reasons of different desertification types. The results show that the average particle size of the surface sand materials for the four different desertification degrees are 132.05, 89.80, 66.81 and 58.90mum in mobile sand, semi-fixed sand, fixed sand and oasis soil, respectively. The average sorting coefficient value is 2.10, 1.75, 1.64 and 1.53, respectively, ranked by oasis soil, mobile sandy, fixed sandy and semi-fixed sandy lands in order. The average values of fractal dimension from large to small are oasis soil, fixed sandy land, semi-fixed sandy land, and mobile sandy land, which are 2.13, 1.76,1.65 and 1.54, respectively.The coarser the average particle size is,the smaller the fractal dimension is. The skewness of surface sand material is symmetrical, and the kurtosis is normal in mobile sandy, semi-fixed sandy and fixed sandy lands.The oasis soil is belonged to fine skewness and normal-narrow kurtosis. There is no significant correlation between the fractal dimension and the average particle size of the sand material on the surface of the mobile sandy land,and there are significant negative correlations in other three desertification degree lands.The fractal dimension of the sand material is significantly negatively correlated with the skewness value, and is positively correlated with the sorting coefficient and kurtosis value. Except that the fractal dimension of sand material in the fixed sandy land and oasis soil is significantly negatively correlated with extremely coarse silt (p<0.05), the fractal dimension of sand materials in other lands are very significantly positive correlated with and clay particles and silt particles, and significantly negative correlated with the content of very fine sand and fine sand particles. The sources of sand material, vegetation coverage and wind force are the main reasons for the differences in the grain size and fractal dimension of surface sediments under different desertification degrees.
中文关键词	荒漠化 ; 粒径特征 ; 分形维数 ; 策勒
英文关键词	desertification particle size characteristics fractal dimension Cele
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Environmental Sciences & Ecology
CSCD记录号	CSCD:7088165
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377692
作者单位	苏松领, 新疆师范大学地理科学与旅游学院, 新疆干旱区湖泊环境与资源重点实验室, 乌鲁木齐, 新疆 830054, 中国.; 毛东雷, 新疆师范大学地理科学与旅游学院, 新疆干旱区湖泊环境与资源重点实验室, 乌鲁木齐, 新疆 830054, 中国.; 赵枫, 新疆师范大学地理科学与旅游学院, 新疆干旱区湖泊环境与资源重点实验室, 乌鲁木齐, 新疆 830054, 中国.; 曹永香, 新疆师范大学地理科学与旅游学院, 新疆干旱区湖泊环境与资源重点实验室, 乌鲁木齐, 新疆 830054, 中国.; 朱文煜, 新疆师范大学地理科学与旅游学院, 新疆干旱区湖泊环境与资源重点实验室, 乌鲁木齐, 新疆 830054, 中国.; 徐佳瑞, 新疆师范大学地理科学与旅游学院, 新疆干旱区湖泊环境与资源重点实验室, 乌鲁木齐, 新疆 830054, 中国.
推荐引用方式 GB/T 7714	苏松领,毛东雷,赵枫,等. 新疆策勒不同荒漠化程度下地表沉积物粒度及分形特征[J],2021,35(11):127-134.
APA	苏松领,毛东雷,赵枫,曹永香,朱文煜,&徐佳瑞.(2021).新疆策勒不同荒漠化程度下地表沉积物粒度及分形特征.干旱区资源与环境,35(11),127-134.
MLA	苏松领,et al."新疆策勒不同荒漠化程度下地表沉积物粒度及分形特征".干旱区资源与环境 35.11(2021):127-134.