干旱区生态环境知识资源中心(Arid): A general model for predicting aeolian transport rate over sand surfaces with vegetation cover

Arid

DOI	10.1002/esp.5388
	A general model for predicting aeolian transport rate over sand surfaces with vegetation cover
	Li, Huiru; Liu, Chenchen; Cheng, Hong; Zou, Xueyong; Zhang, Chunlai; Liu, Bo; Li, Jifeng; Kang, Liqiang; Wu, Yongqiu
通讯作者	Cheng, H
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2022
卷号	47 期号:10 页码:2471-2482
英文摘要	Aeolian sand transport is caused by wind erosion, which is the main cause of environmental problems such as land desertification, blown sand disasters and air pollution. Previous research results and engineering practices have confirmed that vegetation improvement has long-term and comprehensive benefits for controlling aeolian sand transport. The role of vegetation in aeolian sand transport can be explained by the complexity of atmospheric, earth and biosphere systems. However, the lack of a universal model used to predict aeolian transport rate on vegetated surface results in different understandings about vegetation effects due to different experimental methods and materials. To clarify the effect of vegetation on aeolian sand transport, we used a large wind tunnel whose experimental section was 24.0 m-long, 3.0 m-wide and 2.0-m high to provide enough length for aeolian transport and designed a set of novel experimental methods to improve the measurement accuracy of the aeolian transport rate. Based on experimental data, we developed a new equation for aeolian transport rate over bare and vegetated surfaces. We determined that models of aeolian transport rate over bare surface in the literature underestimated the aeolian transport rate measured in this study by 63-80%, 89%, 50% and 35%, confirming that the transport rate decreases exponentially as vegetation coverage increases. However, the power exponent is a variable related to particle size and wind velocity as opposed to a constant in the existing literature; thus, we proposed a dimensionless parameter to express the relationship between the power exponent with particle size and wind velocity and constructed the new equation for vegetated surfaces to be more widely applicable. These results would help to understand the effect of vegetation cover on aeolian sand transport process and to improve the effectiveness of vegetation prevention and control.
英文关键词	aeolian transport rate particle size vegetation wind tunnel wind velocity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000792868500001
WOS关键词	WIND FLOW ; MOVEMENT ; GRAINS ; FIELD ; SALTATION ; MASS
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/2XILL650/392266
推荐引用方式 GB/T 7714	Li, Huiru,Liu, Chenchen,Cheng, Hong,et al. A general model for predicting aeolian transport rate over sand surfaces with vegetation cover[J],2022,47(10):2471-2482.
APA	Li, Huiru.,Liu, Chenchen.,Cheng, Hong.,Zou, Xueyong.,Zhang, Chunlai.,...&Wu, Yongqiu.(2022).A general model for predicting aeolian transport rate over sand surfaces with vegetation cover.EARTH SURFACE PROCESSES AND LANDFORMS,47(10),2471-2482.
MLA	Li, Huiru,et al."A general model for predicting aeolian transport rate over sand surfaces with vegetation cover".EARTH SURFACE PROCESSES AND LANDFORMS 47.10(2022):2471-2482.