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中国沙漠 >

2023 , Vol. 43 >Issue 2: 104 - 113

DOI: https://doi.org/10.7522/j.issn.1000-694X.2022.00110

巴丹吉林沙漠西缘不同地表沙尘水平通量

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  • 1.北京师范大学，环境演变与自然灾害教育部重点实验室，北京 100875
    2.北京师范大学，防沙治沙教育部工程研究中心，北京 100875
    3.北京师范大学，地理科学学部，北京 100875
    4.北京师范大学，国家安全与应急管理学院，北京 100875
    5.中国科学院西北生态环境资源研究院 中国科学院沙漠与沙漠化重点实验室，甘肃 兰州 730000
    6.中国林业科学研究院 生态保护与修复研究所，北京 100091
张国明（E-mail： zgm@bnu.edu.cn）
肖雨婷（1998—），女，四川宜宾人，硕士研究生，研究方向为干旱区地表风蚀过程与粉尘排放。E-mail： 202021051169@mail.bnu.edu.cn

网络出版日期: 2024-06-24

基金资助

国家自然科学基金项目(41971120);中国科学院沙漠与沙漠化重点实验室开放课题(KLDD-2020-002);第二次青藏高原综合科学考察研究项目(2019QZKK0906)

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Sand-dust horizontal flux of different surfaces in the western margin of Badain Jaran Desert

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  • 1.MOE Key Laboratory of Environmental Change and Natural Disasters /, Beijing Normal University，Beijing 100875，China
    2.MOE Engineering Research Center of Desertification and Blown-sand Control /, Beijing Normal University，Beijing 100875，China
    3.Faculty of Geographical Science /, Beijing Normal University，Beijing 100875，China
    4.School of National Safety and Emergency Management, Beijing Normal University，Beijing 100875，China
    5.Key Laboratory of Desert and Desertification，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
    6.Institute of Ecological Conservation and Restoration，Chinese Academy of Forestry，Beijing 100091，China

Online published: 2024-06-24

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摘要

巴丹吉林沙漠西缘是黑河中下游冲洪积平原地表风沙输入沙漠内部的重要断面。在沙漠西缘选择干涸湖床、芦苇滩地、盐碱滩地、流动沙地、灌丛沙堆5种典型地表，利用MWAC沙尘收集器，开展近地表沙尘输移通量的野外观测，分析不同高度（10、25、50、85 cm）沙尘水平通量及分布特征，计算观测期间不同地表沙尘水平通量。结果表明：不同地表沙尘水平通量随高度增加而减小，与高度呈指数型函数关系。0~85 cm高度的5种典型地表沙尘水平通量存在明显差异，流动沙地>干涸湖床>芦苇滩地>盐碱滩地>灌丛沙堆，0~10 cm高度层内沙尘通量占比最大。流动沙地和干涸湖床为巴丹吉林沙漠西缘主要输沙地表。植被覆盖度、裸露空间面积以及地表物质层特性，直接影响地表沙尘的输送通量。风速会影响沙尘水平通量分布，较大风速的地表风蚀起沙的粒径较大，地表沙尘水平通量也较大。研究结果有助于了解沙漠西缘输沙断面不同地表的沙尘输移规律与区域风沙过程。

关键词： 巴丹吉林沙漠; 沙尘; 水平通量; 分布特征

本文引用格式

肖雨婷, 张国明, 洪畅, 刘连友, 杨岩岩, 谷雨, 刘勇, 向明珠, 曲书锋, 孙煦然 . 巴丹吉林沙漠西缘不同地表沙尘水平通量[J]. 中国沙漠, 2023 , 43(2) : 104 -113 . DOI: 10.7522/j.issn.1000-694X.2022.00110

Abstract

The western margin of the Badain Jaran Desert is an important cross-section of sand transportation on the alluvial plain in the middle and lower reaches of the Heihe River. Five typical surfaces （playa， reed land， salt-alkali land， shifting sandy land， nabkha dune） were selected in this study. MWAC dust collectors were used to carry out field observation of near-surface sand-dust transport flux. The horizontal flux and distribution characteristics of sand-dust at different surface heights （10 cm， 25 cm， 50 cm， 85 cm） were observed and analyzed during the observation period. Results showed that the horizontal flux of sand-dust decreased with height following an exponential function. Within 0-85 cm height， the horizontal flux and distribution characteristics of sand-dust on the five typical surfaces were significantly different and the horizontal flux of sand-dust in the 0-10 cm accounted for the largest proportion. The horizontal flux of sand-dust showed a trend that shifting sandy land>playa>reed land>salt-alkali land>nabkha dune. Shifting sandy land and playa are the main sediment transport sources in the western margin of the Badain Jaran Desert. The density of vegetation coverage， the area size of exposed space and the characteristics of soil gravel content directly affected the sand-dust flux that were transported on the surface. Variations of wind speed were likely to affect the distribution of horizontal flux. When wind speed was increased， both the initiated sand particle size and the sand-dust flux were increased. The results could help to understand the dust transport process in the western desert margin， as well as the regional sandstorm process.

Key words： Badain Jaran Desert; sand-dust; horizontal flux; distribution characteristics

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