TECHNICAL NOTES
Mar 1, 2009

Combined Flow over Weir and under Gate

Publication: Journal of Hydraulic Engineering
Volume 135, Issue 3

Abstract

Problems related to sedimentation and deposition can be minimized by using a system where weirs and gates are combined. Given its applications, the hydraulics of simultaneous flow over weir and under gate, in particular, the determination of the stage–discharge relationship, is of interest. Although previous approaches have been based on regression or dimensional analysis, the current work describes a physically based approach. Models of sharp-edged weirs and gates with no lateral contraction are combined. To calibrate and validate the proposed model, experiments have been carried out in a laboratory flume applying different submergence conditions. It was found that the model is able to predict the stage–discharge relationship with reasonable accuracy.

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References

Alhamid, A. A. (1999). “Analysis and formulation of flow through combined V-notch-gate device.” J. Hydraul. Res., 37(5), 697–705.
Ferro, V. (2000). “Simultaneous flow over and under a gate.” J. Irrig. Drain. Eng., 126(3), 190–193.
Majcherek, H. (1984). “Submerged discharge relations of logarithmic weirs.” J. Hydraul. Eng., 110(6), 840–846.
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Negm, A. M. (1996). “Discharge prediction model for simultaneous underflow-overflow.” 6th Int. Symp. on Flow Modeling and Turbulence Measurements, 665–670.
Negm, A. M., Al-Brahim, A. M., and Al-Hamid, A. A. (2002). “Combined-free flow over weirs and below gates.” J. Hydraul. Res., 40(3), 359–365.
Norouzi, B. Y. (1992). “Simultaneous underflow and owerflow past a vertical gate.” MSc thesis presented to the Dept. of Civil Engineering, Roorkee Univ., Roorkee, India.
Villemonte, J. R., Chatterjee, C., Singh, R., Kar, S. K., and Panda, S. N. (1998). “Flow characteristics of chimney weir under submergence” J. Irrig. Drain. Eng., 124(2), 96–101.
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Information & Authors

Information

Published In

Go to Journal of Hydraulic Engineering
Journal of Hydraulic Engineering
Volume 135Issue 3March 2009
Pages: 224 - 227

History

Received: Apr 25, 2007
Accepted: Aug 8, 2008
Published online: Mar 1, 2009
Published in print: Mar 2009

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Authors

Affiliations

Associate Professor, Water Structures Dept., Tarbiat Modares Univ., Jalal-e-Al-e-Ahmed Ave., Tehran, Iran. E-mail: samani̱[email protected]
Mehdi Mazaheri [email protected]
Ph.D. Student, Water Structures Dept., Tarbiat Modares Univ., Jalal-e-Al-e-Ahmed Ave., Tehran, Iran. E-mail: [email protected]

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