Determination of Rectangular Labyrinth Weir's Discharge Coefficient Affecting Downstream and Upstream Ramps Slope

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OSKOUEI M.; EMADI A.R.; SHAHNAZARI A.

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Paper Information

Journal: Irrigation and Drainage Structures Engineering Research Year:2019 | Volume:19 | Issue:73 Page(s): 83-98

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Information Journal Paper

Title

Determination of Rectangular Labyrinth Weir's Discharge Coefficient Affecting Downstream and Upstream Ramps Slope

Author(s)

OSKOUEI M. | EMADI A.R. | SHAHNAZARI A. | Issue Writer Certificate

Keywords

Crest ShapeQ1

Experimental ModelQ1

HydraulicQ1

Upstream Water HeightQ1

Abstract

Labyrinth weirs are considered as appropriate option for correction of weirs facing problems with maximum conveyance flow rate. In this research, 5 rectangular labyrinth weirs with 4 different slopes in downstream and upstream ramps were investigated in laboratory condition. The experiments were carried out for 4 different ramp slopes, including: no slope, 15, 30 and 45 degrees. Our findings showed that, for rectangular labyrinth weir with upstream and downstream ramps slope, discharge coefficient decreased when Ht/P increased. It was also indicated that, in case of creation of slope in downstream and upstream ramps, the discharge coefficient of rectangular labyrinth weir increased and decreased, respectively compared to no slope condition. Furthermore, it was found that in rectangular labyrinth weir model, increase in weir's effective length resulted reduction in discharge coefficient, and that increase in weir's height caused increase in discharge coefficient. Finally, we presented equations of discharge coefficients based on effective dimensionless parameters.

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APA: Copy

OSKOUEI, M., EMADI, A.R., & SHAHNAZARI, A.. (2019). Determination of Rectangular Labyrinth Weir's Discharge Coefficient Affecting Downstream and Upstream Ramps Slope. IRRIGATION AND DRAINAGE STRUCTURES ENGINEERING RESEARCH , 19(73 ), 83-98. SID. https://sid.ir/paper/396386/en

Vancouver: Copy

OSKOUEI M., EMADI A.R., SHAHNAZARI A.. Determination of Rectangular Labyrinth Weir's Discharge Coefficient Affecting Downstream and Upstream Ramps Slope. IRRIGATION AND DRAINAGE STRUCTURES ENGINEERING RESEARCH [Internet]. 2019;19(73 ):83-98. Available from: https://sid.ir/paper/396386/en

IEEE: Copy

M. OSKOUEI, A.R. EMADI, and A. SHAHNAZARI, “Determination of Rectangular Labyrinth Weir's Discharge Coefficient Affecting Downstream and Upstream Ramps Slope,” IRRIGATION AND DRAINAGE STRUCTURES ENGINEERING RESEARCH , vol. 19, no. 73 , pp. 83–98, 2019, [Online]. Available: https://sid.ir/paper/396386/en

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