Stage–Discharge Relationship for an Upstream Inclined Grid with Transversal Bars
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Volume 142, Issue 2
Abstract
Check dams with grids upgrading upstream are often used in mountain rivers, where intense sediment transport and steep slopes occur. In some cases, sloping grids are used in the construction of debris flow breakers. In this paper, the outflow process of an upstream-inclined grid with transversal bars is studied by using the dimensional analysis and the incomplete self-similarity theory. Next, the theoretical analysis shows that a power equation can be used for establishing the stage-discharge equation. The coefficient of the power equation depends on both the slope angle and the void ratio, whereas the exponent depends only on the slope angle. Finally, this deduced stage–discharge relationship is tested by laboratory measurements obtained using a sloping grid with transversal bars having different values of the slope angle and the void ratio.
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Acknowledgments
Both of the authors developed the theoretical analysis, analyzed the results, and contributed to the writing of the paper. The research was supported by a grant of the Project of the University of Palermo “Caratteri eco-fluvio-morfologici e sistemazioni idrauliche dei torrenti siciliani” (FFR 2012/2013).
References
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Journal of Irrigation and Drainage Engineering
Volume 142 • Issue 2 • February 2016
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© 2015 American Society of Civil Engineers.
History
Received: Mar 11, 2015
Accepted: Aug 10, 2015
Published online: Sep 25, 2015
Published in print: Feb 1, 2016
Discussion open until: Feb 25, 2016
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