干旱区研究 ›› 2024, Vol. 41 ›› Issue (4): 661-673.doi: 10.13866/j.azr.2024.04.12 cstr: 32277.14.j.azr.2024.04.12
收稿日期:
2023-10-18
修回日期:
2024-01-26
出版日期:
2024-04-15
发布日期:
2024-04-26
通讯作者:
高鑫. E-mail: gaoxin@ms.xjb.ac.cn作者简介:
刘鑫(1997-),男,硕士研究生,主要从事沙漠化防治工程研究. E-mail: liuxin214@mails.ucas.ac.cn
基金资助:
Received:
2023-10-18
Revised:
2024-01-26
Published:
2024-04-15
Online:
2024-04-26
摘要:
新月形沙丘的移动特征可以反映区域内风沙运移和地貌演化过程,对于科学开展风沙灾害防治具有重要意义。本文利用卫星遥感影像与气象再分析数据,研究了塔克拉玛干沙漠南缘6个新月形沙丘群2012—2022年的形态变化与移动特征。结果表明:(1) 研究区域内新月形沙丘平均移动速率为6.86 m·a-1,移动方向与对应区域内盛行风方向基本一致;(2) 不同区域内新月形沙丘形态参数之间的关联性呈现显著差异;(3) 沙丘高度、下垫面植被覆盖、年均降雨量以及地表温度与沙丘移动速率呈负相关关系,分区拟合结果有差异;(4) 且末西南区域的年平均输沙通量约为77120.5 kg·m-1。研究结果反映了新月形沙丘移动规律的复杂性,不同地理环境因子的影响程度或存在显著差异,需结合实地情况进行具体分析。同时,在沙丘演化过程中,形态参数的动态变化反映了沙丘迁移的内在机理,进一步为新月形沙丘的发育机理提供了实证数据,也为沙丘危害防治和土地规划提供了参考依据。
刘鑫, 高鑫. 塔克拉玛干沙漠南缘新月形沙丘移动特征[J]. 干旱区研究, 2024, 41(4): 661-673.
LIU Xin, GAO Xin. Migration velocity of barchan dunes at the southern margin of the Taklamakan Desert[J]. Arid Zone Research, 2024, 41(4): 661-673.
表1
新月形沙丘影像信息"
影像时间/年-月-日 | 数据来源 | 分辨率 | |
---|---|---|---|
沙丘群1 | 2011-11-10 | WorldView-2 | 0.54 m |
2020-05-11 | WorldView-2 | 0.54 m | |
沙丘群2 | 2011-10-02 | WorldView-2 | 0.54 m |
2020-02-14 | WorldView-2 | 0.54 m | |
沙丘群3 | 2011-11-19 | WorldView-2 | 0.54 m |
2020-07-24 | WorldView-2 | 0.54 m | |
沙丘群4 | 2011-04-16 | WorldView-2 | 0.54 m |
2020-04-24 | WorldView-2 | 0.54 m | |
沙丘群5 | 2011-12-31 | WorldView-2 | 0.54 m |
2019-12-04 | WorldView-2 | 0.54 m | |
沙丘群6 | 2011-12-31 | WorldView-2 | 0.54 m |
2020-09-30 | WorldView-2 | 0.54 m |
表2
研究区新月形沙丘移动情况统计结果"
移动速率 | 移动方向 | ||||||
---|---|---|---|---|---|---|---|
范围/(m·a-1) | 均值/(m·a-1) | 标准差 | 范围/(°) | 均值/(°) | 标准差 | ||
沙丘群1 | 1.1~6.5 | 4.2 | 1.2 | 19.6~284.0 | 112.9 | 38.5 | |
沙丘群2 | 0.2~18.6 | 6.0 | 4.2 | 97.8~299.1 | 117.2 | 41.6 | |
沙丘群3 | 5.9~13.6 | 9.4 | 1.9 | 59.8~258.6 | 102.6 | 28.8 | |
沙丘群4 | 4.8~13.5 | 8.3 | 2.6 | 73.7~113.9 | 90.6 | 8.2 | |
沙丘群5 | 8.1~20.9 | 12.2 | 3.5 | 212.2~234.9 | 223.1 | 5.4 | |
沙丘群6 | 3.5~13.5 | 7.7 | 2.2 | 47.6~254.4 | 219.5 | 32.7 |
表3
研究区新月形沙丘形态参数统计结果"
北翼 | 南翼 | 迎风坡 | 背风坡 | 宽度 | ||
---|---|---|---|---|---|---|
沙丘群1 | 范围 | 41.7~296.1 | 34.8~300.0 | 33.6~99.0 | 2.1~10.3 | 28.3~202.9 |
均值 | 133.2 | 105.5 | 65.6 | 6.0 | 98.9 | |
沙丘群2 | 范围 | 45.6~376.3 | 48.7~282.7 | 34.5~126.9 | 2.5~11.3 | 37.8~280.5 |
均值 | 198.3 | 154.6 | 82.7 | 6.9 | 158.1 | |
沙丘群3 | 范围 | 56.8~310.2 | 55.6~349.0 | 28.2~140.4 | 1.8~8.2 | 52.6~220.4 |
均值 | 137.5 | 109.3 | 60.8 | 4.3 | 95.1 | |
沙丘群4 | 范围 | 23.6~128.5 | 15.0~162.9 | 18.1~85.2 | 1.7~4.3 | 13.7~190.6 |
均值 | 76.6 | 69.4 | 44.6 | 2.8 | 75.0 | |
沙丘群5 | 范围 | 29.9~161.0 | 34.7~311.4 | 13.4~70.6 | 3.0~10.3 | 24.5~262.4 |
均值 | 89.0 | 170.5 | 37.8 | 5.8 | 140.9 | |
沙丘群6 | 范围 | 187.1~1273.5 | 94.0~432.9 | 53.3~283.2 | 4.9~24.3 | 163.3~837.7 |
均值 | 468.2 | 255.1 | 102.1 | 12.2 | 435 |
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