干旱区研究

干旱区研究 >

2016 , Vol. 33 >Issue 1: 210 - 214

DOI: https://doi.org/10.13866/j.azr.2016.01.28

其他

河岸沙丘粒度分布特征

  • 王勇 ,
  • 韩广 ,
  • 杨林 ,
  • 颜新国 ,
  • 郭宇航
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  • 1.湖南师范大学资源与环境科学学院,湖南 长沙 410081;
    2.内蒙古师范大学生命科学与技术学院,内蒙古 呼和浩特 010022
王勇(1988-),男,硕士,主要从事风沙地貌研究.E-mail:13027315459@163.com

收稿日期: 2015-02-09

  修回日期: 2015-05-13

  网络出版日期: 2016-01-29

基金资助

国家自然科学基金项目(41271025);湖南省重点学科(地理学)建设项目(2012001)资助

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Grain Size Distribution of Sand Dunes at River Banks

  • WANG Yong ,
  • HAN Guang ,
  • YANG Lin ,
  • YAN Xin-guo ,
  • GUO Yu-hang
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  • 1. College of Resources and Environment,Hunan Normal University,Changsha 410081,Hunan,China;
    2. College of Life Science and Technology,Inner Mongolia Normal University,Huhhot 010022,Inner Mongolia,China

Received date: 2015-02-09

  Revised date: 2015-05-13

  Online published: 2016-01-29

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摘要

沙丘沉积物粒度特征分析是研究风沙地貌过程的主要内容之一。通过野外实地考察与测量,并沿盛行风向对西辽河平原西部响水河两岸的河岸沙丘进行样品采集,经室内激光粒度仪测试,研究河岸沙丘的粒度分布规律。结果表明:① 响水河东岸沙丘粒径粗于西岸沙丘。东岸沙丘由迎风坡脚到背风坡中下部粒径总体变细,从两侧坡脚到丘顶分选性逐渐变好。西岸沙丘由两侧坡脚到丘顶粒径变细,偏度趋于正偏,分选均较好。河流砂最细,其平均粒径总体细于东、西岸沙丘砂,分选性好于东岸沙丘,差于西岸沙丘。② 东岸沙丘受河流与风力作用可以从较深地层获取沙源,西岸沙丘主要受风力作用从较浅地层获得沙源。

关键词： 粒度组成; 粒度参数; 迎风坡; 背风坡; 响水河; 辽河平原

本文引用格式

王勇 , 韩广 , 杨林 , 颜新国 , 郭宇航 . 河岸沙丘粒度分布特征[J]. 干旱区研究, 2016 , 33(1) : 210 -214 . DOI: 10.13866/j.azr.2016.01.28

Abstract

The analysis on of grain size distribution characteristics of sand dunes sediments was one of the major content of aeolian landform process.Through the field research and measurement,samples of river sand dunes in the Xiangshui River situated in the west of western Liaohe River campagna were collected along the prevailing wind direction; the grain size distribution law was studied by lazer particle analyzer.The results were obtained as follows:① the grain size of river sand dunes in the east is coarser than that the west.The grain size of river sand dunes in the east decreases from windward slope toe to the mid-below part of leeward slope; the sorting becomes much better from the bilateral slope toe to the slope top.The grain size of river sand dunes in the west becomes finer,equally sorted and positively skewed from the bilateral slope toe to the slope top.River sand is the finest; its mean grain size is finer than the sand in the east and west bank,its sorting is better than the sand in the east bank and worse than the sand in the west bank in general.② With the action of wind and river,sand dunes in the east can get sand source from deep strata.But sand dunes in the west obtain sand of shallow strata under the effect of wind.

Key words： grain size composition; grain size parameters; windward slope; leeward slope; Xiangshui River; Liaohe river plain

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