Discharge Capacity of Side Weirs in Circular Channels

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Allahdadi k.; PARSI E.; BAHREBAR A.; FARHADI R.

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Journal Paper

Paper Information

Journal: Iranian Journal of Irrigation and Drainage Year:2021 | Volume:15 | Issue:3 Page(s): 531-542

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Information Journal Paper

Title

Discharge Capacity of Side Weirs in Circular Channels

Author(s)

Allahdadi k. | PARSI E. | BAHREBAR A. | FARHADI R. | Issue Writer Certificate

Keywords

Critical depth

Discharge coefficient

Protective structures

Regression

Abstract

Side weirs are one of the most important Protective structures upstream of structures such as reverse siphons and underpasses in irrigation and drainage networks. In this research, using laboratory data and numerical solution in free flow mode in the pipe, new relationships based on the Critical depth of the upstream flow to determine the discharge capacity of sideweirs in circular channels (pipes) in critical situations and Supercritical is presented. This relationship depends on effective parameters such as P / y1, weir crown height to the depth of flow at the beginning of the weir, flow height over the weir crown to weir height ((y1-p) / p) and Critical depth of the flow passing over the weir crown. The results of this study showed that the upstream flow rate in the subcritical flow mode is higher than the supercritical flow mode. Also, the relations provided for calculating the flow rate of side weirs in circular channels are suggested due to having high Regression and consistency of computational and observational results for designing this type of side weirs in circular channels.

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APA: Copy

Allahdadi, k., PARSI, E., BAHREBAR, A., & FARHADI, R.. (2021). Discharge Capacity of Side Weirs in Circular Channels. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, 15(3 ), 531-542. SID. https://sid.ir/paper/1053950/en

Vancouver: Copy

Allahdadi k., PARSI E., BAHREBAR A., FARHADI R.. Discharge Capacity of Side Weirs in Circular Channels. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE[Internet]. 2021;15(3 ):531-542. Available from: https://sid.ir/paper/1053950/en

IEEE: Copy

k. Allahdadi, E. PARSI, A. BAHREBAR, and R. FARHADI, “Discharge Capacity of Side Weirs in Circular Channels,” IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, vol. 15, no. 3 , pp. 531–542, 2021, [Online]. Available: https://sid.ir/paper/1053950/en

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