Upstream Discharge Distribution in Compound-Channel Flumes
Publication: Journal of Hydraulic Engineering
Volume 131, Issue 5
Abstract
Common inlet design for compound-channel flumes does not ensure a proper upstream discharge distribution. As the total head in the upstream tank is the same for both main-channel and floodplain subsections, the velocity in the upstream section is also the same in both subsections. The floodplain discharge is therefore too large and a mass transfer towards the main channel occurs along the flume. This Technical Note investigates how long a compound-channel flume must be to ensure that equilibrium between subsection discharges is achieved. The required length is found to be significant compared to the actual length of experimental flumes reported in the literature.
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Acknowledgments
Experiments in CNR and LMFA flumes were funded by the PNRH99-04 research programme. D. Bousmar and S. Proust’s travel costs were supported by the Tournesol programme grant 02947VM funded by EGIDE, France and CGRI, Communauté française de Belgique.
References
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 131 • Issue 5 • May 2005
Pages: 408 - 412
Copyright
© 2005 ASCE.
History
Received: Jul 8, 2003
Accepted: Sep 13, 2004
Published online: May 1, 2005
Published in print: May 2005
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