[1]王丽琴,李红丽,董智,等.额济纳盆地戈壁纵剖面沉积物粒度参数分析[J].水土保持研究,2014,21(01):152-156,162.
　WANG Li-qin,LI Hong-li,DONG Zhi,et al.Particle Size Characteristics of Sediment Profile in Gobi of Ejina Basin[J].Research of Soil and Water Conservation,2014,21(01):152-156,162.
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额济纳盆地戈壁纵剖面沉积物粒度参数分析

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 21 期数: 2014年01期 页码: 152-156,162 栏目: 出版日期: 2014-02-28
Title:
Particle Size Characteristics of Sediment Profile in Gobi of Ejina Basin
作者:
王丽琴1, 李红丽1, 董智1, 沈运扩1, 张志鹏1, 杨文斌2
1. 山东农业大学 林学院 山东省土壤侵蚀与生态修复重点实验室 泰山森林生态站, 山东 泰安 271018;
2. 中国林业科学研究院 荒漠化研究所, 北京 100091
Author(s):
WANG Li-qin1, LI Hong-li1, DONG Zhi1, SHEN Yun-kuo1, ZHANG Zhi-peng1, YANG Wen-bin2
1. Taishan Forest Ecosystem Research Station, Shandong Provincial Key Laboratory of Soil Erosion and Ecological Restoration, College of Forestry, Shandong Agricultural University, Tai’an, Shandong 271018, China;
2. Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China
关键词:
戈壁; 沉积物; 纵剖面; 粒度组成; 粒度特征; 额济纳盆地
Keywords:
Gobi; sediments; profile; particle size composition; particle size characteristics; Ejina basin
分类号:
P588.21,X141
摘要:
以额济纳荒漠戈壁为研究对象，通过野外实地调查与室内实验相结合的方法，采用平均粒径、分选系数、偏度、峰度等粒度参数对戈壁纵剖面沉积物粒度特征进行了分析。研究表明：在纵剖面，除冲积扇上部外，其余采样点均沿垂直方向从上至下沉积物粒度组成由石块变为砂粒；除冲积扇上部外，颗粒平均粒径沿垂直方向呈细化趋势，平均粒径由粗变细；戈壁不同剖面层沉积物颗粒分选系数整体呈分选差或较差，仅东居延海岸边浅滩和东居延海湖岸分选较好或中等；偏度除冲积扇上部呈负偏、极负偏外，其他各点偏度沿垂直方向由上至下趋于近对称、正偏分布；在冲积扇上部和中部，峰态以宽平为主，在冲积扇下部到东居沿海湖岸沉积物沿垂直方向由下至上峰态由宽平、很宽平变成尖窄分布。总之，戈壁纵剖面沉积物的粒度特征整体呈平均粒径由粗变细，分选差或较差，偏度呈近对称、正偏分布，峰态宽平的特点，反映了不同层次颗粒的沉积环境、地貌特征、侵蚀与堆积方式，可为戈壁类型划分提供依据。
Abstract:
By taking the Ejina Basin region as the research site, the particle size composition of sediment profile in gobi, average particle size, sorting coefficient, skewness and kurtosis were analyzed by field investigation and laboratory test. The results show that each sample point along the vertical direction from top to bottom sediment particle size composition from stone into sand on the longitudinal sediment. Except for the top of alluvial fan, the average grain size changed smaller and had significantly thinner trend by vertical direction. The grain sorting coefficient in different profile layers was poor or poorer, but only it was better or medium on near shore lake shallow and lake side. Except for the top of alluvial fan, the skewness was from negative to very negative, in other points; the skewness of sediment particle from top to bottom tends to nearly symmetry and positive distribution by the vertical direction. The kurtosis in the top of alluvial fan and in the middle of alluvial fan sediment were flat, while from the alluvial fan edge to lake side sediment by flat, wide flat into sharp distribution from the bottom up. All in all, the sediment profiles of gobi appeares the characteristics of fine average grain size, poor or pooer sorting coefficient, nearly symmetry and positive skewness and flat kurtosis, which reflects the particles in different levels of sedimentary environment, geomorphic feature, erosion and deposition pattern, and can provide the basis for the gobi classification.

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备注/Memo

收稿日期:2013-05-07;改回日期:2013-06-18。
基金项目:中国林业科学研究院专项资金重大项目“中国黑戈壁区生态本底调查”（CAFYBB2011002）；林业行业专项“中国沙漠分类与编目指标体系研究”（201004059）
作者简介:王丽琴(1986-),女,山西运城人,硕士研究生,主要研究方向:林业生态工程。E-mail:603277547@qq.com
通讯作者:李红丽(1972-),女,内蒙赤峰人,博士,副教授,硕士生导师,主要研究方向:荒漠化防治与植被恢复。E-mail:lhl@sdau.edu.cn

更新日期/Last Update: 1900-01-01