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敦煌鸣沙山沙漠绿洲交错带防护体系防风固沙效果评价

Evaluation of windproof and sand fixation effect of protective system in the Desert oasis ecotone of Mingsha Mountain Dunhuang.

作者信息

Zhang Kecun, Zhang Hongxue, An Zhishan, Xue Chengjie

机构信息

Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands/Dunhuang Gobi Desert Ecology and Environment Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China.

Wuhan Business University, Wuhan, 430000, China.

出版信息

Sci Rep. 2025 Jan 2;15(1):546. doi: 10.1038/s41598-024-84397-x.

DOI:10.1038/s41598-024-84397-x
PMID:39748073
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11696569/
Abstract

The Desert oasis ecotone (DOE) protects the oasis from wind and sand intrusion, thereby playing a crucial role in controlling desertification. However, there is limited knowledge about how DOE functions in windproof and sand-fixation. Therefore this study employs a three-dimensional (3D) laser scanner to monitor surface accumulation and erosion, and through field observations, collects data on wind profiles, grain size, and sand transport rates to uncover the role of DOE in aeolian sand protection. The results indicate that, compared to the desert area, the wind speed and sand transport rate decreased by 39.8% and 44.64% respectively in the DOE, while the friction velocity u* increased by 18. 51% and roughness Z increased by 8 times. The average grain size gradually diminished from desert area to DOE, and the sorting worsened. Observations show that in both desert area and DOE, wind erosion pits form on the windward side and dunes on the leeward side. The volume of sand accumulation shows an exponential increase with wind speed, while the erosion volume decreases linearly in the desert and sand barrier fence zones. The DOE effectively mitigated wind speed and the sand flow entering the oasis, demonstrating a remarkable windproof and sand-fixation effect. This study can provide important references for the establishment and optimization of protective systems in DOE.

摘要

沙漠绿洲交错带（DOE）保护绿洲免受风沙侵袭，从而在控制荒漠化方面发挥着关键作用。然而，关于DOE在防风固沙方面的作用机制，目前的了解还很有限。因此，本研究采用三维（3D）激光扫描仪监测地表堆积和侵蚀情况，并通过实地观测收集风速剖面、粒度和输沙率数据，以揭示DOE在风沙防护中的作用。结果表明，与沙漠地区相比，DOE内风速和输沙率分别降低了39.8%和44.64%，而摩擦速度u*增加了18.51%，粗糙度Z增加了8倍。平均粒径从沙漠地区到DOE逐渐减小，分选性变差。观测表明，在沙漠地区和DOE中，迎风面均形成风蚀坑，背风面均形成沙丘。沙堆积量随风速呈指数增加，而在沙漠和沙障围栏区侵蚀量呈线性减少。DOE有效地降低了进入绿洲的风速和沙流，显示出显著的防风固沙效果。本研究可为DOE防护系统的建立和优化提供重要参考。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/3399503dced3/41598_2024_84397_Fig12_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/76d32fd1fe62/41598_2024_84397_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/150c1dd60c1b/41598_2024_84397_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/4c34ecc7c2c6/41598_2024_84397_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/ccd5da263eaa/41598_2024_84397_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/b66054b73f87/41598_2024_84397_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/d8693510716d/41598_2024_84397_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/e950488d48c5/41598_2024_84397_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/d9f432e10dba/41598_2024_84397_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/3c3ba4af4fc9/41598_2024_84397_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/a474acb2504a/41598_2024_84397_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ac86/11696569/3399503dced3/41598_2024_84397_Fig12_HTML.jpg

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2
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Sci Rep. 2017 Aug 10;7(1):7723. doi: 10.1038/s41598-017-04971-4.
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Optimal array of sand fences.最优沙障排列。
Sci Rep. 2017 Mar 24;7:45148. doi: 10.1038/srep45148.