干旱区生态环境知识资源中心(Arid): 青海湖湖东沙地风沙沉积物的粒度特征

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	青海湖湖东沙地风沙沉积物的粒度特征
其他题名	Grain-size Features of Aeolian Deposits in the Eastern Shore of Qinghai Lake
	张登山; 田丽慧; 鲁瑞洁; 唐清亮; 石昊
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2013
卷号	36 期号:2 页码:203-211
中文摘要	通过对青海湖湖东沙地克土沙区不同类型沙丘地表沉积物粒度特征的水平变化和0~20 cm垂直变化的分析,可知自然固定沙丘的表层沉积物以细砂为主,其他沙丘以中砂为主,粒度参数随着地形起伏有不同的变化特征;随着深度的增加,粗颗粒逐渐增多,细颗粒逐渐减少,粒度参数随着深度的增加呈波动减小的趋势。通过比较分析,可得出人工治理措施对沙地地表环境的影响较大,能促进细颗粒物质的沉积,有效减少地表的风蚀量。
英文摘要	The sandy land on the eastern shore of Qinghai Lake is the biggest area in the decertified land of Qinghai Lake Basin. Some measures have been taken to prevent and control desertification in Kutu district since 2008. The article chose 4 sandy dune styles on the eastern shore of Qinghai Lake,78 sediment samples were collected at 26 sites in 7 landform parts respectively. Then, grain-size range was determined by Malvern Mastersize 2000 laser particle size analyzer in order to analyze the grain-size characteristics of horizontal change of surface sediments and vertical change with the depths from 0cm to 20 cm. It can be seen that on the surface of natural fixed dune, fine materials content is 42.25%,and the dune is primarily made up of fine materials,while medium sand is widely distributed on other sand dunes. The characteristics of surface deposits are medium because sorting coefficient is 0.78. Sand dunespartial degree values range between 0.04 and 0.24,half-artificial fixed dunesare near symmetrical, and other dunesare positively partial. Peak state ranges between 0.90 and 1.50,natural fixed dune is with narrow peak state, and other dunes are in secondary peak condition. Meanwhile,the particle size parameters as the terrain of ups and downs have different characteristics of the change. The same depth, the higher the degree of sand dunes fixed,fine materials are more. Along with the change of the depth, coarse particles increase gradually,and fine particles reduce. With the increase of the depth, particle size parameters decrease in the trend of fluctuations. Through the comparison of the grain-size characteristics of different typessand dunes, artificial control measures have a great influence on sand surface environment,promoting fine particle depositing, and can effectively reduce the surface wind erosion.
中文关键词	青海湖湖东沙地 ; 地表沉积物 ; 粒度特征 ; 地形 ; 垂直变化
英文关键词	Sandy land in eastern shore of Qinghai Lake Surface sediments Grain-size characteristics Terrain Vertical change
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:4832926
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/2XILL650/229510
作者单位	北京师范大学, 环境演变与自然灾害教育部重点实验室, 北京 100875, 中国
推荐引用方式 GB/T 7714	张登山,田丽慧,鲁瑞洁,等. 青海湖湖东沙地风沙沉积物的粒度特征[J]. 北京师范大学,2013,36(2):203-211.
APA	张登山,田丽慧,鲁瑞洁,唐清亮,&石昊.(2013).青海湖湖东沙地风沙沉积物的粒度特征.干旱区地理,36(2),203-211.
MLA	张登山,et al."青海湖湖东沙地风沙沉积物的粒度特征".干旱区地理 36.2(2013):203-211.