Arid
DOI10.1016/j.geomorph.2006.05.004
Aeolian shear stress ratio measurements within mesquite-dominated landscapes of the Chihuahuan Desert, New Mexico, USA
King, James; Nickling, W. G.; Gillies, J. A.
通讯作者King, James
来源期刊GEOMORPHOLOGY
ISSN0169-555X
EISSN1872-695X
出版年2006
卷号82期号:3-4页码:229-244
英文摘要

A field study was conducted to ascertain the amount of protection that mesquite-dominated communities provide to the surface from wind erosion. The dynamics of the locally accelerated evolution of a mesquite/coppice dune landscape and the undetermined spatial dependence of potential erosion by wind from a shear stress partition model were investigated. Sediment transport and dust emission processes are governed by the amount of protection that can be provided by roughness elements. Although shear stress partition models exist that can describe this, their accuracy has only been tested against a limited dataset because instrumentation has previously been unable to provide the necessary measurements. This study combines the use of meteorological towers and surface shear stress measurements with Irwin sensors to measure the partition of shear stress in situ. The surface shear stress within preferentially aligned vegetation (within coppice dune development) exhibited highly skewed distributions, while a more homogenous surface stress was recorded at a site with less developed coppice dunes. Above the vegetation, the logarithmic velocity profile deduced roughness length (based on 10-min averages) exhibited a distinct correlation with compass direction for the site with vegetation preferentially aligned, while the site with more homogenously distributed vegetation showed very little variation in the roughness length. This distribution in roughness length within an area, defines a distribution of a resolved shear stress partitioning model based on these measurements, ultimately providing potential closure to a previously uncorrelated model parameter. (c) 2006 Elsevier B.V. All rights reserved.


英文关键词shear stress partitioning wind erosion atmospheric boundary layer drag partition vegetation field study
类型Article
语种英语
国家Canada ; USA
收录类别SCI-E
WOS记录号WOS:000243163200003
WOS关键词WIND EROSION ; ROUGH SURFACES ; SAND TRANSPORT ; MODEL VALIDATION ; DRAG PARTITION ; VEGETATION ; FIELD ; THRESHOLD ; TUNNEL ; VELOCITY
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
来源机构Desert Research Institute
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/151543
作者单位(1)Univ Guelph, Dept Geog, Wind Eros Lab, Guelph, ON N1G 2W1, Canada;(2)Desert Res Inst, Div Atmospher Sci, Particle Emiss Measurement Lab, Reno, NV 89512 USA
推荐引用方式
GB/T 7714
King, James,Nickling, W. G.,Gillies, J. A.. Aeolian shear stress ratio measurements within mesquite-dominated landscapes of the Chihuahuan Desert, New Mexico, USA[J]. Desert Research Institute,2006,82(3-4):229-244.
APA King, James,Nickling, W. G.,&Gillies, J. A..(2006).Aeolian shear stress ratio measurements within mesquite-dominated landscapes of the Chihuahuan Desert, New Mexico, USA.GEOMORPHOLOGY,82(3-4),229-244.
MLA King, James,et al."Aeolian shear stress ratio measurements within mesquite-dominated landscapes of the Chihuahuan Desert, New Mexico, USA".GEOMORPHOLOGY 82.3-4(2006):229-244.
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