Analytical Modeling of Mean Velocity Profile through Two-Layered Fully Submerged Vegetation
Publication: Journal of Hydraulic Engineering
Volume 149, Issue 2
Abstract
The mean velocity distribution of open channel flows with fully submerged two-layered vegetation can be divided into three zones. Zone 1 represents the lower region of short vegetation, where the flow has high drag because of highly dense vegetation, Zone 2 represents the middle flow zone from the edge of the short vegetation to the top of the tall one, and Zone 3 denotes the upper region with the free surface flow. A new analytical model is developed based on the momentum equation of vegetated flow, where turbulent eddy viscosity is approximated as a linear relationship with local velocity. The analytical model was evaluated using seven experimental data sets under different flow conditions with distinctive densities and formations of vegetation. Three sets of data available from other researchers were also used to check the applicability of the proposed model. An agreement between the analytical model and experimental data indicates the validity and robustness of the model.
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Data Availability Statement
All data, models, or codes supporting this study’s findings are available from the corresponding author upon reasonable request.
Acknowledgments
This work was supported from the research funding of Xi’an Jiaotong-Liverpool University (XJTLU) (RDF-16-02-02, REF-20-02-03, and PGRS2012007). The authors also acknowledge the experimental data sets from Huai et al. (2014) and Liu et al. (2008), and the reviewers for their constructive comments. The authors confirm that there are no conflicts of interest.
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Published In
Journal of Hydraulic Engineering
Volume 149 • Issue 2 • February 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Jan 20, 2022
Accepted: Oct 11, 2022
Published online: Nov 29, 2022
Published in print: Feb 1, 2023
Discussion open until: Apr 29, 2023
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