Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 0169-555X |
EISSN | 1872-695X |
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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