Discharge Capacity of Labyrinth Side Weir Located on a Straight Channel
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VIEW THE REPLYPublication: Journal of Irrigation and Drainage Engineering
Volume 136, Issue 1
Abstract
Side weirs, also known as lateral weirs, are flow diversion devices widely used in irrigation as a head regulator of distributaries and escapes, land drainage, and urban sewage systems. The studies on the subject have been generally focused on rectangular and triangular side weirs located on a straight channel. However, the same is not true for labyrinth side weirs. The current studies deal with sediment transport and scour problems around side weirs and lateral structures. The investigation of the hydraulic effects of labyrinth side weirs to increase discharge capacity of them has been studied in this particular work. In the study, 2,830 laboratory tests were conducted for determining discharge coefficient of labyrinth side weirs, and results were analyzed to find the influence of the dimensionless weir length , the dimensionless effective length , the dimensionless weir height , triangular labyrinth side weir included angle , and upstream Froude number on the discharge coefficient, water surface profile and velocities in the channel along the side weir. It has been found that discharge coefficient of labyrinth side weirs gives pretty higher coefficient value compare to that of classical side weirs and a reliable equation for discharge coefficient of labyrinth weirs is presented. Discharge coefficient of the labyrinth side weir is 1.5–4.5 times higher than rectangular side weir.
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Acknowledgments
This work was financially supported by the Scientific and Technological Research Council of Turkey (TUBITAK).
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Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 136 • Issue 1 • January 2010
Pages: 37 - 46
Copyright
© 2010 ASCE.
History
Received: Sep 8, 2008
Accepted: Apr 25, 2009
Published online: Apr 29, 2009
Published in print: Jan 2010
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