Sediment deposition within and around a finite patch of model vegetation over a range of channel velocity
Name
Liu_et_al-2016-Water_Resources_Research.pdf
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1.5 MB
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Adobe PDF
Checksum (MD5)
e63a711964064b626a20cec3c2021cb3
Author(s)
Liu, Chao
Nepf, Heidi
Date Issued
January 2016
Journal
Water Resources Research
Publisher
American Geophysical Union (AGU)
Citation
Liu, Chao, and Heidi Nepf. “Sediment Deposition Within and Around a Finite Patch of Model Vegetation over a Range of Channel Velocity.” Water Resources Research 52, 1 (January 2016): 600–612 © 2016 American Geophysical Union
Version
Final published version
Abstract
The interaction between flow and vegetation creates feedbacks to deposition that vary with channel velocity. This experimental study describes how channel velocity and stem-generated turbulence influence the deposition within and around an emergent patch of model vegetation, with a particular focus on deposition within the patch. The Reynolds number threshold for stem-scale turbulence generation was determined using velocity spectra and flow visualization. At high channel velocity resuspension occurred in the bare regions of the channel and a nonuniform spatial distribution of net deposition was observed around and within the patch. In contrast, at low channel velocity there was no (or limited) resuspension and a uniform distribution of net deposition was observed around and within the patch. The deposition inside the patch was enhanced, relative to a bare-channel control, only when the following two criteria were met: (1) the absence of stem turbulence, and (2) the presence of sediment resuspension in the bare channel. Comparison to previous lab and field studies further support these criteria.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1002/2015WR018249
