干旱区生态环境知识资源中心(Arid): Threshold Friction Velocity Influenced by the Crust Cover of Soils in the Columbia Plateau

Arid

DOI	10.2136/sssaj2018.06.0230
	Threshold Friction Velocity Influenced by the Crust Cover of Soils in the Columbia Plateau
	Pi, Huawei 1,2,3; Sharratt, Brenton 4
通讯作者	Pi, Huawei
来源期刊	SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
ISSN	0361-5995
EISSN	1435-0661
出版年	2019
卷号	83 期号:1 页码:232-241
英文摘要	Soil crusts provide stability and protection against wind erosion from semiarid and arid lands. Although erosion is initiated when the friction velocity (U) exceeds the threshold friction velocity (U(t)) of soils, there is little information available on the effect of soil crust cover on U(t). The objective of this study was therefore to evaluate the effect of soil crust cover on the U(t) of five loessial soils of the Columbia Plateau, United States. Soil samples were sieved and the erodible fraction was placed in 1 by 0.2 by 0.015 m trays. Water drops 4.5 mm in diameter were applied to the soil surface at a known density, which, after drying, created various percentages of crust cover. The trays were placed inside a wind tunnel to assess U(t). which was determined by systematically wind speed until an increase was observed in total suspended particulate concentration inside the tunnel. No significant differences in U(t) were found among 0, 15, and 30% cover but significant differences in U(t) were found between 60 and 100% cover. The U(t) of 100% crust cover was about twice that of 0% cover. Crust crushing energy, which influences abrasion, did not vary across crust cover treatments. The Single-event Wind Erosion Evaluation Program (SWEEP) revealed the similar influence of crust cover on U(t). The SWEEP adequately simulated U(t) for 0, 15, and 30% crust cover but overestimated U(t) for 60 and 100% cover. These results suggest that crusts effectively protect the soil from wind erosion by increasing U(t).
类型	Article
语种	英语
国家	USA ; Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000459315800025
WOS关键词	WIND EROSION ; AGRICULTURAL FIELDS ; AGGREGATE ; SWEEP ; DISTURBANCE ; MODEL ; BASIN ; DUST ; SIZE
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218882
作者单位	1.Washington State Univ, Dept Crop & Soil Sci, Pullman, WA 99164 USA; 2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Xinjiang, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 4.Washington State Univ, ARS, USDA, 215 Johnson Hall, Pullman, WA 99164 USA
推荐引用方式 GB/T 7714	Pi, Huawei,Sharratt, Brenton. Threshold Friction Velocity Influenced by the Crust Cover of Soils in the Columbia Plateau[J]. 中国科学院新疆生态与地理研究所,2019,83(1):232-241.
APA	Pi, Huawei,&Sharratt, Brenton.(2019).Threshold Friction Velocity Influenced by the Crust Cover of Soils in the Columbia Plateau.SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,83(1),232-241.
MLA	Pi, Huawei,et al."Threshold Friction Velocity Influenced by the Crust Cover of Soils in the Columbia Plateau".SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 83.1(2019):232-241.