American Society of Civil Engineers


Experimental Investigation of the Outflow Process over a Triangular Labyrinth-Weir


by Francesco Giuseppe Carollo, Ph.D., (engineer, Dipartimento dei Sistemi Agro-Ambientali, Facoltà di Agraria, Università di Palermo, Viale delle Scienze, 90128 Palermo. E-mail: fg.carollo@proland.it), Vito Ferro, Ph.D., (corresponding author), (Full Professor, Dipartimento dei Sistemi Agro-Ambientali, Facoltà di Agraria, Università di Palermo, Viale delle Scienze, 90128 Palermo. E-mail: vito.ferro@unipa.it), and Vincenzo Pampalone, Ph.D., (engineer, Dipartimento dei Sistemi Agro-Ambientali, Facoltà di Agraria, Università di Palermo, Viale delle Scienze, 90128 Palermo. E-mail: vincenzo.pampalone@unipa.it)

Journal of Irrigation and Drainage Engineering, Vol. 138, No. 1, January 2012, pp. 73-79, (doi:  http://dx.doi.org/10.1061/(ASCE)IR.1943-4774.0000366)

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Document type: Journal Paper
Abstract: In this paper, the outflow process from a sharp-crested triangular labyrinth weir is studied. Applying dimensional analysis and the Π theorem, five dimensionless groups, describing the outflow process, are deduced. The measurements, carried out by using sharp-crested weirs placed in a flume, allowed to establish a dimensionless stage-discharge relation. According to this equation, the flow magnification is affected by either the length magnification ratio or head to one cycle width ratio. The proposed equation, which also satisfies two theoretical boundary conditions, was finally tested by using experimental measurements of different reservoir hydraulic models.


ASCE Subject Headings:
Open channel flow
Weirs
Head (fluid mechanics)
Water discharge

Author Keywords:
Open channel flow
Weir
Head
Discharge