Benchmark of Discharge Calibration Methods for Submerged Sluice Gates
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VIEW THE REPLYPublication: Journal of Irrigation and Drainage Engineering
Volume 135, Issue 5
Abstract
Real accuracy of several calibration methods for sluice gates working in the submerged orifice flow condition was determined considering water discharge from water levels and gate openings. Data were taken from three gates of the same laboratory canal covering a large operational range. Using accurate hydraulic data, most of the methods produce errors of up to ±10%. However, errors can rise up to ±40% with methods using typically recommended calibration values or constant discharge coefficients. The best results were obtained by a method based on dimensional analysis and the incomplete self-similarity theory proposed recently in the literature. Calibration with field data, in this case, produced errors not higher than ±3%. On the other side, when the gate discharge data are not available, the use of a contraction value of 0.611 within a good theoretical formulation gives very good results.
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Acknowledgments
The writers acknowledge the financial support of the Spanish Ministry of Science and Education through Project No. UNSPECIFIEDREN2002-00032 and the FPI Grant No. UNSPECIFIEDBES-2003–2042 awarded to the first writer.
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Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 135 • Issue 5 • October 2009
Pages: 676 - 682
Copyright
© 2009 ASCE.
History
Received: Feb 15, 2008
Accepted: Dec 29, 2008
Published online: Jan 26, 2009
Published in print: Oct 2009
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