干旱区生态环境知识资源中心(Arid): Effects of gravel cover on the near-surface airflow field and soil wind erosion

Arid

DOI	10.1016/j.still.2021.105133
	Effects of gravel cover on the near-surface airflow field and soil wind erosion
	Li, Huiru; Zou, Xueyong; Zhang, Chunlai; Kang, Liqiang; Cheng, Hong; Liu, Bo; Liu, Wei; Fang, Yi; Yang, Dongliang; Wu, Xiaoxu
通讯作者	Zou, XY (corresponding author), Beijing Normal Univ, MOE Engn Res Ctr Desertificat & Blown Sand Contro, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China.
来源期刊	SOIL & TILLAGE RESEARCH
ISSN	0167-1987
EISSN	1879-3444
出版年	2021
卷号	214
英文摘要	Gravel cover is a traditional farming practice to improve soil properties and advance soil productivity. In arid areas, gravel cover can directly affect the near-surface airflow field to inhibit the soil wind erosion rate (q). The effectiveness of gravel cover in wind erosion control has been recognized in practice, but there are few reports about experimental data. This study aimed to identify the mechanism under which gravel changes the nearsurface airflow field and q. The wind profiles at different positions around gravel roughness elements and q were measured under five inlet friction wind velocities (uinfinity), five gravel sizes (D) and five gravel coverages (GC) in a large wind tunnel, and an equation of q was established. The results showed significant differences among the wind profiles due to the effects of uinfinity, D and GC. Although the wind profile at any position did not represent the average state of the rough surface, the average wind profile of the different positions did. When the density of gravel roughness elements increased, the near-surface airflow changed from isolated-roughness flow to wake interference flow and skimming flow, which directly affected the spatial pattern and the rate of wind erosion. The equation of q established in this study not only integrated the effects of variables on the q, including D, GC, the average friction wind velocity (u) and threshold friction wind velocity (ut), but also represented the behavior of wind erosion being aggravated by gravel cover when GC <= 10 % and D >= 3.15 cm. This study can contribute to an understanding of the structural change to the near-surface airflow field and to the prediction of q on gravelcovered surfaces, which provides guidance information for rational utilization of gravel-covered fields in arid areas.
英文关键词	Wind profile Aerodynamic parameters Effective gravel coverage Wind tunnel
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000701947700007
WOS关键词	AERODYNAMIC ROUGHNESS ; WATER CONSERVATION ; DUST EMISSION ; TUNNEL ; SAND ; TRANSPORT ; VELOCITY ; MULCH ; AREAS ; BED
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364701
作者单位	[Li, Huiru; Zou, Xueyong; Zhang, Chunlai; Kang, Liqiang; Cheng, Hong; Fang, Yi] Beijing Normal Univ, MOE Engn Res Ctr Desertificat & Blown Sand Contro, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China; [Liu, Bo] Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China; [Liu, Wei] Tianjin Normal Univ, Sch Geog & Environm Sci, Tianjin 300387, Peoples R China; [Yang, Dongliang] Beijing Normal Univ, High Sch 2, Haidian Branch Sch, Beijing 100192, Peoples R China; [Wu, Xiaoxu] Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Li, Huiru,Zou, Xueyong,Zhang, Chunlai,et al. Effects of gravel cover on the near-surface airflow field and soil wind erosion[J]. 北京师范大学,2021,214.
APA	Li, Huiru.,Zou, Xueyong.,Zhang, Chunlai.,Kang, Liqiang.,Cheng, Hong.,...&Wu, Xiaoxu.(2021).Effects of gravel cover on the near-surface airflow field and soil wind erosion.SOIL & TILLAGE RESEARCH,214.
MLA	Li, Huiru,et al."Effects of gravel cover on the near-surface airflow field and soil wind erosion".SOIL & TILLAGE RESEARCH 214(2021).