干旱区生态环境知识资源中心(Arid): 呼伦湖西南部咸水湖干涸湖滨带沉积物粒度特征

Arid

	呼伦湖西南部咸水湖干涸湖滨带沉积物粒度特征
其他题名	Grain Size Characteristics of Sediments in the Dry Lakeside of Salt Lake in the Southwest of Hulun Lake
	韩旭娇 1; 张国明 1; 刘连友 1; 严平 2; 戴佳栋 1
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2019
卷号	39 期号:2 页码:158-165
中文摘要	沙粒是区域地表沙化的重要物质基础,以呼伦湖西南部典型间歇性干涸盐湖的湖滨带为研究对象,通过野外采样和室内测定,分析沉积物粒度组成及平均粒径、标准偏差、偏度和峰态值等粒度参数,探讨粒度与可蚀性特征。结果表明:区内干涸盐湖湖滨带沉积物属沙壤土,干涸湖滨带是潜在的风蚀粉尘释放源;粉砂和细砂是湖滨带沉积物呈现空间变化的主要粒级,从湖心到湖滨带,沉积物粒径频率分布曲线呈三峰态向双峰态渐变,地表粗化现象明显;风力搬运侵蚀是表层沉积物粒度发生变化的主要原因。受主风向影响,呼伦湖西南部咸水湖干涸湖滨带存在沿主风向扩大趋势,如进一步连通成片可能发展为呼伦贝尔沙地新的风蚀区,应该引起重视。
英文摘要	Sand component is an important material basis for regional surface desertification. The typical intermittent salt lake in the southwest of Hulun Lake was selected as the research object. Through field survey and measurement, particle size composition and grain size parameters of stratified samples 0-10cm layers in ten sites from the water margin to the lakeside zone in the southwest of the typical playa were measured. After analyzing the particle size distribution, the paper discussed the characteristics of grain size and erodibility. The results indicated that the sediments were sandy loam and aeolian sandy soil and the lakeside zone was a potential source of wind erosion and dust release. There were spatial heterogeneity of particle size composition in the lakeside. The majority of soil particle size was occupied by silt and fine sand which were the main grain grades of sediments showing spatial changes from the water margin to the lakeside zone. The grain size frequency curve of sediments showed the change from a three-peak to a double-peak dominated by fine sand grains from the water margin to the lakeside zone. The rough phenomenon of the surface particle size has been shown obvious from the edge of the lake to the lakeside in the study area. Wind transport and wind erosion were the main reasons for sediment particle size changing on the surface. Affected by the main wind direction,there exists a trend of expansion along the main wind direction at the playas lakesides in the southwest of Hulun Lake in recent years. The desertification of the playas lakesides intensifies,showing a trend of connected slices,which may become a new wind erosion area in Hulunbeier Sandy Land. Therefore,the phenomenon of wind erosion and desertification and the area expansion in the playa lakesides should be paid attention to.
中文关键词	间歇性干涸盐湖 ; 湖滨带 ; 粒度特征 ; 可蚀性
英文关键词	intermittent salt lake lakeside zone grain size characteristics erodibility
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:6460477
来源机构	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/2XILL650/239777
作者单位	1.北京师范大学;;北京师范大学地理科学学部民政部/教育部减灾与应急管理研究院, 环境演变与自然灾害教育部重点实验室;;, ;;, 北京;;北京 100875;;100875, 中国; 2.北京师范大学;;北京师范大学地理科学学部地理学院, 地表过程与资源生态国家重点实验室;;, ;;, 北京;;北京 100875;;100875, 中国
推荐引用方式 GB/T 7714	韩旭娇,张国明,刘连友,等. 呼伦湖西南部咸水湖干涸湖滨带沉积物粒度特征[J]. 北京师范大学,2019,39(2):158-165.
APA	韩旭娇,张国明,刘连友,严平,&戴佳栋.(2019).呼伦湖西南部咸水湖干涸湖滨带沉积物粒度特征.中国沙漠,39(2),158-165.
MLA	韩旭娇,et al."呼伦湖西南部咸水湖干涸湖滨带沉积物粒度特征".中国沙漠 39.2(2019):158-165.