THE EFFECT OF UPSTREAM SIDE SLOPE ON DISCHARGE COEFFICIENT IN THE
SIDE-WEIRS

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KESHAVARZI A.R.; FARAROOI A. R.

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Paper Information

Journal: THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA) Year:2004 | Volume:27 | Issue:1 Page(s): 93-104

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Title

THE EFFECT OF UPSTREAM SIDE SLOPE ON DISCHARGE COEFFICIENT IN THE SIDE-WEIRS

Author(s)

KESHAVARZI A.R. | FARAROOI A. R. | Issue Writer Certificate

Keywords

SIDE-WEIRQ4

UPSTREAM SIDE SLOPEQ4

DISCHARGE COEFFICIENTQ4

Abstract

The structure ,ofthe flow at SIDE-WEIRis very complicatedand in spite of numerous works on this topic, no general model exists for accurate estimation of the discharge. Irrigation canals are usually built in trapezoidal cross sections; however, most previous researches for SIDE-WEIRs were carried out in canals with rectangular cross section. In particular, no .work was done on the effect of UPSTREAM SIDE SLOPE on SIDE-WEIR DISCHARGE COEFFICIENT.In this study, to investigate the effect of side slope and weir height on DISCHARGE COEFFICIENT, a long physical model was built and a series of experimentaltests were carried outunder different flow conditions. The experimental model consists of a trapezoidal concrete canal with different side slopes as: 1:0, 1:0.5, 1:1 and 1:1.5, and constant base width of 0.4 m at all reaches. All SIDE-WEIRs were set at constant height of 0.1 m, and constant length of 0.3 m. The experiments were carried out in different flow conditions and the discharge was measured using pre-calibrated standard right angle V-Notch. A mathematical model was developed to estimate DISCHARGE COEFFICIENTs and overflow discharge over the SIDE-WEIR.The mathematical model was compared with experimental data. To compare the developed model with some of the previous mathematical models, the results of those models were also compared with the experimentaldata. The results showed that the developed model gives better estimation of DISCHARGE COEFFICIENT,when compared with the previous models for open-end flow condition. Additionally, the experimental results for similarflow conditions showed that the side slope of 1:0.5 gave high DISCHARGE COEFFICIENTas comparedwith the other side slopes.

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APA: Copy

KESHAVARZI, A.R., & FARAROOI, A. R.. (2004). THE EFFECT OF UPSTREAM SIDE SLOPE ON DISCHARGE COEFFICIENT IN THE SIDE-WEIRS. THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA), 27(1), 93-104. SID. https://sid.ir/paper/24637/en

Vancouver: Copy

KESHAVARZI A.R., FARAROOI A. R.. THE EFFECT OF UPSTREAM SIDE SLOPE ON DISCHARGE COEFFICIENT IN THE SIDE-WEIRS. THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA)[Internet]. 2004;27(1):93-104. Available from: https://sid.ir/paper/24637/en

IEEE: Copy

A.R. KESHAVARZI, and A. R. FARAROOI, “THE EFFECT OF UPSTREAM SIDE SLOPE ON DISCHARGE COEFFICIENT IN THE SIDE-WEIRS,” THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA), vol. 27, no. 1, pp. 93–104, 2004, [Online]. Available: https://sid.ir/paper/24637/en

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