新月形沙丘研究进展
作者简介:杨岩岩(1988-),女,甘肃礼县人,博士研究生,主要从事水土保持与荒漠化防治。E-mail:yanyang@mail.bnu.edu.cn
收稿日期: 2013-02-24
要求修回日期: 2013-04-20
网络出版日期: 2013-06-13
基金资助
国家自然科学基金(41201261、40771021)、国家自然科学基金(41071331)、中国人民财产保险股份有限公司支持的学生项目资助
A Review of Barchan Dunes
Received date: 2013-02-24
Request revised date: 2013-04-20
Online published: 2013-06-13
Copyright
杨岩岩 , 刘连友 , 屈志强 , 张国明 . 新月形沙丘研究进展[J]. 地理科学, 2014 , 34(1) : 76 -83 . DOI: 10.13249/j.cnki.sgs.2014.01.76
Barchan dunes are the most common and more in-depth researched aeolian landform, which have been learnt for a long time. This study briefly reviews the shapes and migration, formation conditions and process, flow field and erosion, grain size and structure, distribution and interaction of barchan dunes, and analyzes its study trends. Although a lot of important progress has been made in the study of barchan dune, there are still many problems needs to be solved. Firstly, shapes and migration are the most obvious characters of the barchan dune and have been researched since 1940. However, in the same region where the shapes of barchan dune are varied, the reasons are worth studying. Meanwhile, the researches in barchan dunes migration were concentrated on long period of time interval, while the short time interval studies, such as season and sand storm event, are critical in the projects of windbreak and sand-fixation, but have been concerned little. Secondly, in the formation condition and process, whether EST can stand for sand availability or not and which parameters can instead of it are still needed to answer. Meantime, experiments of the formation process are few, which are very important to prove the conceptual model. Thirdly, in the flow field of barchans dunes, how to measure shear force and the turbulent are very important aspects to study since how sand movement and deposition in the turbulent condition are the microscopic factors to explain the evolution. Moreover, studies of barchans dune structures are limited, so we can use new technologies, such as GPR(Ground Penetrating Radar) in the future. At last, distribution and interaction of barchan dunes are hot fields, where many studies have been done. However, they are still to be advanced and qualitative, and lots of problems are needed to solve. For instance, process, mass change and control condition of interaction, formation and development mechanism of barchans dune distribution.
Fig.1 The morphological parameters of barchan dune图1 新月形沙丘的形态参数 |
Table 1 The migration of barchan dune in different regions表1 不同研究区新月形沙丘移动状况 |
研究区 | 平均移动速度(m/a) | 方向 | 时间分辨率 | 方 法 | 参考文献 |
---|---|---|---|---|---|
塔克拉玛干南缘 | 5~18 | ESE | 1 a | 插钎法 | [17,23] |
塔克拉玛干 | 6.4 | SW | 2 a | 插钎法 | [24] |
大沙丘国家公园和自然保护区(美国) | 1.9~7.5 | WSW | 63 a | 遥感影像 | [25] |
纳米布沙漠 | 3.75 | NE | 24 a | 遥感影像 | [26] |
秘鲁南部 | 15 | NE | 3 a | 遥感影像 | [27] |
秘鲁南部 | 11~60 | SE | 11 a | 遥感影像 | [19] |
腾格里沙漠 | 3.42 | SE | - | 14C | [28] |
英皮里尔谷 | 15~25 | E | 22 a | 遥感影像 | [11] |
西奈半岛西北部 | 11.9 | SE,E | 1 a | 遥感影像和COSI-Corr技术 | [29] |
阿拉善高原北部 | 5.3 | ESE-SE | 27 a | 遥感影像 | [30] |
维谷(南极洲) | 1.5 | SW | 40 a | 遥感影像和LiDAR | [13] |
直布罗陀海峡 | 1.75 | W | 1 d | 插钎法 | [31] |
科伯克河谷国家公园(阿拉斯加) | 0.5~1.5 | SW | 5 a | 遥感影像和COSI-Corr技术 | [32] |
注:表中“-”表示时间分辨率没有意义。 |
The authors have declared that no competing interests exist.
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