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dc.contributor.authorWhite, Brian L.  Concept link
dc.contributor.authorNepf, Heidi M.  Concept link
dc.date.accessioned2010-05-18T18:56:27Z
dc.date.available2010-05-18T18:56:27Z
dc.date.issued2008-01-08
dc.identifier.citationWater Resources Research 44 (2008): W01412en_US
dc.identifier.urihttps://hdl.handle.net/1912/3473
dc.descriptionAuthor Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Water Resources Research 44 (2008): W01412, doi:10.1029/2006WR005651.en_US
dc.description.abstractThis paper presents a method for predicting the distributions of velocity and shear stress in shallow channels with a boundary of emergent vegetation. Experiments in a laboratory channel with model vegetation show that the velocity profile exhibits a distinct two-layer structure, consisting of a rapidly varying shear layer across the vegetation interface and a more gradual boundary layer in the main channel. In addition, coherent vortices are observed which span both layers, and are the dominant contributors to lateral momentum fluxes. From these observations, we propose a model for the vortex-induced exchange and find expressions for the width of momentum penetration into the vegetation, the velocity and shear stress at the vegetation edge, and the width of the boundary layer in the main channel. These variables, along with a momentum balance in the main channel, comprise a modeling framework which accurately reproduces the observed velocity and shear stress distributions. The predictions for the velocity and shear stress can provide a basis for modeling flood conveyance, overbank sediment transport, and scalar residence time in the vegetated layer.en_US
dc.description.sponsorshipThis material is based upon work supported by the National Science Foundation under grant 0125056.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttps://doi.org/10.1029/2006WR005651
dc.subjectVegetated channelen_US
dc.subjectShallow shear layeren_US
dc.subjectCoherent structuresen_US
dc.titleA vortex-based model of velocity and shear stress in a partially vegetated shallow channelen_US
dc.typeArticleen_US
dc.identifier.doi10.1029/2006WR005651


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