干旱区生态环境知识资源中心(Arid): Characterizing sand transport with various micro-ridge spacings and heights

Arid

DOI	10.1002/esp.5857
	Characterizing sand transport with various micro-ridge spacings and heights
	Jia, Wenru; Li, Xiuming; Li, Shengyu; Li, Qing; Wang, Shijie; Yan, Haiming; Xie, Baoni; Wei, Hao
通讯作者	Li, XM
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2024
卷号	49 期号:9 页码:2779-2788
英文摘要	In arid regions, the use of ridge cover as a traditional agricultural strategy has been effective in mitigating soil wind erosion. However, few studies have focused on the sand transport characteristics of different micro-ridge spacings and heights. This study aimed to identify the mechanism by which ridges change the near-surface sand transport. In a controlled wind tunnel environment, the aeolian sand flux structure and sand transport flux (qz) at heights from 0 to 0.7 m were measured. The results showed that, compared with no ridges, ridge covering could significantly modify the structure of aeolian sand flux near the surface, yielding a substantial reduction in the proportion of sand transport to the total sand transport in the 0- to 0.1-m height layer. In the absence of ridges, blown sand was mainly concentrated in the 0- to 0.1-m height layer, and qz decreased exponentially as the height increased. With various micro-ridge spacings and heights, when H was less than 0.1 m and L was more than 15H, the blown sand also remained concentrated in the 0- to 0.1-m height layer, and qz decreased exponentially as the height increased. When H increased to 0.15 m from 0.1 m and L decreased from 15H to 5H, the height of the blown sand was concentrated in the 0.3- to 0.4-m layer. The blown sand layer of most ridge structures was concentrated at a height of 0.1-0.4 m, and the structure of the aeolian sand flux resembled an 'elephant nose effect'. The total sand transport rate of all ridge structures was significantly lower than that with no ridges, indicating that a reasonable ridge structure can effectively prevent wind erosion. The results confirmed that the variation of sand transport flux with height could be divided into two cases: one shows that sand transport flux decreases exponentially with increase of height; whereas, the other shows that sand transport flux increases with increase of height below critical height and decreases exponentially with the increasing of height above critical height, known as 'elephant nose effect'. These results help to further recognizing the process and mechanism of wind erosion in ridge farmland. image
英文关键词	aeolian sand flux micro-ridge sand transport rate wind tunnel wind velocity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001224529300001
WOS关键词	WIND-TUNNEL SIMULATION ; AIR-FLOW ; EROSION ; SOIL ; ROUGHNESS ; SALTATION ; VELOCITY ; FIELD ; SIZE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403321
推荐引用方式 GB/T 7714	Jia, Wenru,Li, Xiuming,Li, Shengyu,et al. Characterizing sand transport with various micro-ridge spacings and heights[J],2024,49(9):2779-2788.
APA	Jia, Wenru.,Li, Xiuming.,Li, Shengyu.,Li, Qing.,Wang, Shijie.,...&Wei, Hao.(2024).Characterizing sand transport with various micro-ridge spacings and heights.EARTH SURFACE PROCESSES AND LANDFORMS,49(9),2779-2788.
MLA	Jia, Wenru,et al."Characterizing sand transport with various micro-ridge spacings and heights".EARTH SURFACE PROCESSES AND LANDFORMS 49.9(2024):2779-2788.