Research Article
Jul 1975
Analysis of Flow through Vegetation
Publication: Journal of the Hydraulics Division
Volume 101, Issue 7
Abstract
The Manning n value is quantitatively evaluated for flow in heavily vegetated channels. Momentum analysis shows that the composite n value as a function of flow depth is dependent on the bottom roughness and the density of vegetation. In some cases, the vegetation density can be evaluated directly from physical measurements of the vegetation. However, in most situations, it must be evaluated indirectly from limited field data. The results show that the n value increases in proportion to two-thirds power of the hydraulic radius for conditions where the vegetation density is a constant over the flow depth. Field application of the flow resistance model are described for projects concerned with flood routing, backwater computations, extension of rating curves, channel improvement work, and erosion control.
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Published In
Journal of the Hydraulics Division
Volume 101 • Issue 7 • July 1975
Pages: 871 - 884
Copyright
© 1975 American Society of Civil Engineers.
History
Published in print: Jul 1975
Published online: Feb 3, 2021
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Authors
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Sylvester Petryk, AM.ASCE
Asst. Prof., Dept. of Civ. and Coastal Engrg., Univ. of Florida, Gainesville, Fla.; formerly, ASEE Resident Fellow with Harza Engrg. Co., Chicago, Ill.
George Bosmajian III
National Sci. Foundation Undergrad. Research Participant, Dept. of Civ. and Coastal Engrg., Univ. of Florida, Gainesville, Fla.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.