EXPERIMENTAL INVESTIGATION OF DISCHARGE COEFFICIENT FOR COMPOUND SHARP CRESTED SIDE WEIRS

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BAGHERI S.; ZAHIRI A.R.; GHOBADIAN R.; DEHGHANI A.A.; MEFTAH HALAGHI M.

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Journal: Journal of Water and Soil Conservation Year:2013 | Volume:20 | Issue:1 Page(s): 133-150

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Title

EXPERIMENTAL INVESTIGATION OF DISCHARGE COEFFICIENT FOR COMPOUND SHARP CRESTED SIDE WEIRS

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Keywords

FLOW DISCHARGE MEASUREMENTQ2

SIDE WEIRQ2

COMPOUND WEIRSQ2

DISCHARGE COEFFICIENTQ2

Abstract

Side weir is one of the most common structures for flow control and diversion in hydraulic laboratories, irrigation and drainage networks and water and waste water channels. SIDE WEIRs are generally sharp crested and have limitations in measuring discharge, hence in this study, the compound sharp crested SIDE WEIRs have been suggested, for the first time. Accurate flow measurement in wide range of discharges in comparison with simple SIDE WEIRs, is one of the main characteristics of these weirs. Some experiments have been carried out in a rectangular-rectangular compound SIDE WEIR with variable heights and widths. Dimensional analysis of effective parameters on flow discharge of a compound weir illustrates that its DISCHARGE COEFFICIENT is a function of upstream Froude number, ratio of weighted height of weir crest to upstream water depth and ratio of channel width to upstream water depth. Based on the experimental data and optimization technique, a dimensionless equation has been developed for calculation of the DISCHARGE COEFFICIENT. Then, a new equation has been proposed for prediction of flow discharge in compound rectangular-rectangular sharp crested SIDE WEIRs. Through comparison of results of this new equation and experimental data, the determination coefficients of training and testing data were calculated as 0.96 and 0.98, respectively. Also, mean average relative error was 6.4%.

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APA: Copy

BAGHERI, S., ZAHIRI, A.R., GHOBADIAN, R., DEHGHANI, A.A., & MEFTAH HALAGHI, M.. (2013). EXPERIMENTAL INVESTIGATION OF DISCHARGE COEFFICIENT FOR COMPOUND SHARP CRESTED SIDE WEIRS. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 20(1), 133-150. SID. https://sid.ir/paper/156048/en

Vancouver: Copy

BAGHERI S., ZAHIRI A.R., GHOBADIAN R., DEHGHANI A.A., MEFTAH HALAGHI M.. EXPERIMENTAL INVESTIGATION OF DISCHARGE COEFFICIENT FOR COMPOUND SHARP CRESTED SIDE WEIRS. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2013;20(1):133-150. Available from: https://sid.ir/paper/156048/en

IEEE: Copy

S. BAGHERI, A.R. ZAHIRI, R. GHOBADIAN, A.A. DEHGHANI, and M. MEFTAH HALAGHI, “EXPERIMENTAL INVESTIGATION OF DISCHARGE COEFFICIENT FOR COMPOUND SHARP CRESTED SIDE WEIRS,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 20, no. 1, pp. 133–150, 2013, [Online]. Available: https://sid.ir/paper/156048/en

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