巴丹吉林沙漠典型地域沙丘多年变化的遥感动态分析

doi:10.11873/j.issn.1004-0323.2011.4.501

遥感技术与应用

2011, Vol. 26

Issue (4): 501-507 DOI: 10.11873/j.issn.1004-0323.2011.4.501

遥感应用

巴丹吉林沙漠典型地域沙丘多年变化的遥感动态分析

陈芳,刘勇

(兰州大学遥感与地理信息系统研究所,甘肃兰州730000)

Secular Annual Movement of Sand Dunes in Badain Jaran Desert based on Geographic Analyses of Remotely Sensed Imagery

CHEN Fang,LIU Yong

(Lanzhou University,Remote Sensing and Geographic Information Systems Research Institute,Lanzhou 730000,China)

全文: PDF(2660 KB)

摘要：

在各种地貌发育类型中,沙丘属于快速移动的地貌类型。目前关于沙丘动力学机制的研究已经很深入,但关于区域移动状况的研究仍十分有限。区域沙丘移动涉及的研究范围较大,用传统的地面观测手段很难满足需要。自20世纪70年代Landsat卫星发射以来,其为沙丘移动研究提供了长周期、大尺度的影像资源及新方法。利用1989~2010年间多景Landsat TM影像对巴丹吉林沙漠4个典型区域的沙丘移动变化进行分析,在几何精纠正的基础上提取沙梁线,以判断沙丘移动方向和速度,并分析其动力成因机制。结果表明:① Landsat TM影像能有效用于10 a尺度的巴丹吉林沙漠典型地区的沙丘变化研究；② 北部高大沙丘的多年变化不明显；③ 东部和东南部流沙带的沙丘移动方向为东南向,南部流沙带的沙丘移动方向存在西北—东南向的往复性,与区域风场基本一致；④ 结合ASTER DEM数据对沙丘移动速度和高度关系进行了分析,二者呈负相关关系。

关键词： Landsat TM; 几何纠正; 沙丘移动; 动力机制

Abstract:

Among the various categories of landform evolution,sand dune is a kind which moves faster than the other.Until now,it is still fewer reports on this aspect while the dynamics mechanisms of sand dunes have been well studied.Its difficult to study the large area movement of sand dunes by using traditional method such as ground\|based observations.Since Landsat satellites launch in the 1970s,it provides long\|period,large scale images for the research of dunes movement.In this article,many temporary and scenes of Landsat Thematic Mapper imagery from 1989 to 2010 are used to analyze the movement of sand dunes in four typical areas of Badain Jaran desert.Direction and speed of sand dunes can be extracted from sand ridges of images after geometric correction.We get following results:① Landsat TM images can be effectively used to the epochs of ten years dynamic detection of sand dunes in the Bardain Jaran desert;② The movement of sand dunes in North are not distinct;③ Sand dunes in East and Southeast sand belt move towards SE,while sand dunes in south sand belt reciprocate from NW to SE.Sand dunes movement is consist with regional wind fields;④ The relation between the speed and the height of sand dunes can be analyzed with DEM data.There is a negative correlation between them.

Key words: Landsat TM Image geometric correction Movement of sand dunes Dynamics mechanism

收稿日期: 2011-04-12 出版日期: 2011-08-23

P 931.3

基金资助:

阿拉善SEE生态协会遥感调查项目(SEEA0905YWL001)。

作者简介: 陈芳(1984-),女,河南周口人,硕士研究生。主要从事遥感与地理信息相关研究。Email:chenfangfang605@126.com。

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引用本文:

陈芳,刘勇. 巴丹吉林沙漠典型地域沙丘多年变化的遥感动态分析[J]. 遥感技术与应用, 2011, 26(4): 501-507.

CHEN Fang,LIU Yong. Secular Annual Movement of Sand Dunes in Badain Jaran Desert based on Geographic Analyses of Remotely Sensed Imagery. Remote Sensing Technology and Application, 2011, 26(4): 501-507.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2011.4.501 或 http://www.rsta.ac.cn/CN/Y2011/V26/I4/501

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