Research Article
May 1973
Flexible Roughness in Open Channels
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VIEW THE REPLYPublication: Journal of the Hydraulics Division
Volume 99, Issue 5
Abstract
The logarithmic flow formula for open channels is valid for flow over a roughness cover made up of flexible plastic strips. The deflection of such roughness is an important parameter as the deflection directly influences the relative roughness. Dimensionless parameters which relate the amount of bending to the stiffness of the roughness and the boundary shear are defined. Three regimes of boundary behavior are observed for flexible plastic roughness, leading to two resistance functions. The flexible plastic roughness is produced by affixing thin plastic strips of various thickness to the bed of a flume. The flow of water over flexible plastic strips simulates flow over a vegetative channel lining.
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Published In
Journal of the Hydraulics Division
Volume 99 • Issue 5 • May 1973
Pages: 713 - 728
Copyright
© 1973 American Society of Civil Engineers.
History
Published in print: May 1973
Published online: Feb 3, 2021
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Nicholas Kouwen, AM.ASCE
Asst. Prof. of Civ. Engrg., Univ. of Waterloo, Waterloo, Ontario, Canada
Tharakkal Eroman Unny, AM.ASCE
Prof. of Civ. Engrg., Univ. of Waterloo, Waterloo, Ontario, Canada
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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.