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中国沙漠 ›› 2014, Vol. 34 ›› Issue (3): 645-649.DOI: 10.7522/j.issn.1000-694X.2013.00367

• 沙漠与沙漠化 • 上一篇    下一篇

敦煌月牙泉景区沙丘粒度特征

张号, 张克存, 安志山, 庞营军   

  1. 中国科学院寒区旱区环境与工程研究所 敦煌戈壁荒漠生态与环境研究站/沙漠与沙漠化重点实验室, 甘肃 兰州 730000
  • 收稿日期:2013-03-22 修回日期:2013-06-18 出版日期:2014-05-20 发布日期:2014-05-20
  • 作者简介:张号(1988-),男,山东济南人,硕士研究生,主要从事风沙灾害研究与监测。Email:zhanghaocas@163.com
  • 基金资助:
    国家自然科学基金项目(41071009;41371027);中国科学院“西部之光”项目(29Y128841)资助

Grain Size Characteristics of Sand Dunes around the Crescent Moon Spring in Dunhuang, China

Zhang Hao, Zhang Kecun, An Zhishan, Pang Yingjun   

  1. Dunhuang Gobi Research Station/Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2013-03-22 Revised:2013-06-18 Online:2014-05-20 Published:2014-05-20

摘要: 对月牙泉外围沙山表面沉积物进行系统采样,结合区域风况,分析了沙山典型部位的粒度分布及其参数特征。月牙泉北侧金字塔沙丘沙粒较粗,分选性较差,正偏趋势显著;月牙泉南侧线形沙丘以细沙为主,分选性较好,分布属正偏态。北侧金字塔沙丘从西南和西北两个坡面到东侧坡面,粗颗粒减少、分选性变好,但趋势不明显,说明金字塔沙丘未发生明显移动;而南侧线形沙丘自南侧坡面向北侧坡面沙粒粒径变小、分选变好,较细的沙粒被搬运并沉积北侧坡面,搬运作用十分明显,即线形沙丘向月牙泉方向发生明显移动。通过粒度分析风沙动力环境表明,月牙泉风沙危害主要来自南侧沙山北移。

关键词: 月牙泉, 沙丘, 粒度参数

Abstract: Through systematic sampling of the sand dunes around the Crescent Moon Spring, combined with regional wind conditions data, this paper made an analysis of the particle size distribution and grain size characteristics. The pyramid dune to the north of the Crescent Moon Spring's particle size is relatively coarse and sorting is poor, with a distribution of more positive skewness, while the liner sand dune to the south of the Crescent Moon Spring mainly consists of fine sand and better sorting, with a distribution of positive skewness. From the northwest and southwest slopes to the east slope, sediment grains becomes finer, and sorting becomes better, but the trend is not significant, indicating that there is no significant movement of the pyramid dune. However, on the liner sand dune, from the southern slope to the north slope, sand particle size becomes finer and sorting changes better, showing that the movement of linear sand dune to south of the Crescent Moon Spring is obvious. Analysis of wind power environment and the grain size characteristics indicates that the blown sand disaster to the Crescent Moon Spring mainly comes from the northward movement of the linear sand dune movement.

Key words: Crescent Moon Spring, sand dunes, grain size parameters

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