Transition Effects in Flow Over Side Weirs
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VIEW THE REPLYPublication: Journal of Irrigation and Drainage Engineering
Volume 130, Issue 1
Abstract
The effect of water surface slope in the lateral direction on flow over side weirs was studied. Water surface elevation on the weir plane was expressed by a parameter ψ based upon the hydraulic profile on the channel axis. Two different relationships of ψ as a function of the Froude number were used to calculate side weir discharges. Results were compared with the experimental data. It was shown that better results are obtained when transition conditions of at the ends of the side weirs with no lateral surface slope are taken into account. However the effect of water surface slope in lateral direction is of secondary importance as compared to the angle of the deflected water jet along the side weir.
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References
Borghei, S. M., Jalili, M. R., and Ghodsian, M.(1999). “Discharge coefficient for sharp-crested side weirs in subcritical flow.” J. Hydraul. Eng., 125(10), 1051–1056.
De Marchi, G.(1934). “Saggio di teoria di funzionamente degli stramazzi laterali.” L’Energia Elettrica, 11, 849–860 (in Italian).
Hager, W. H. (1982). Die Hydraulik von Verteilkanalen, Teil 1-2, Mitteilungen der Versuchanstalt für Wassebau, Hydrologie und Glaziologie, Nr.55-56, Zürich.
Muslu, Y.(2001). “Numerical analysis for lateral weir flow.” J. Irrig. Drain. Eng., 127(4), 246–253.
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Subramanya, K., and Awasthy, S. C.(1972). “Spatially varied flow over side-weirs.” J. Hydraul. Div., Am. Soc. Civ. Eng., 98(1), 1–10.
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Copyright © 2004 American Society of Civil Engineers.
History
Received: Mar 18, 2002
Accepted: Feb 19, 2003
Published online: Jan 16, 2004
Published in print: Feb 2004
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