<abstract xmlns="http://www.w3.org/1999/xhtml"><p> This paper is concerned with the determination of the relationship for the calculation of the discharge coefficient at free overflow over a rectangular sharp-edged broad-crested weir without lateral contraction. The determination was made on the basis of new measurement in a range of the relative thickness of the weir from 0.12 to 0.30 and newly in a large range of relative height of the weir extremely from 0.24 to 6.8 which greatly expands the application possibilities of low weirs. In addition, the effects of friction and surface tension on the value of the discharge coefficient were evaluated as well as the effect of the relative thickness of the weir. The new equation for discharge coefficient, expressed using the relative height of the weir, was subjected to verification made by an independent laboratory which confirmed its accuracy.</p></abstract>

This paper is concerned with the determination of the relationship for the calculation of the discharge coefficient at free overflow over a rectangular sharp-edged broad-crested weir without lateral contraction. The determination was made on the basis of new measurement in a range of the relative thickness of the weir from 0.12 to 0.30 and newly in a large range of relative height of the weir extremely from 0.24 to 6.8 which greatly expands the application possibilities of low weirs. In addition, the effects of friction and surface tension on the value of the discharge coefficient were evaluated as well as the effect of the relative thickness of the weir. The new equation for discharge coefficient, expressed using the relative height of the weir, was subjected to verification made by an independent laboratory which confirmed its accuracy.

Discharge coefficient of a rectangular sharp-edged broad-crested weir

Laboratory of Water Management Research, Department of Water Structures, Faculty of Civil Engineering, Brno University of Technology, Veveří 331/95, 602 00, Brno, Czech Republic

Department of Water management Conceptions and Information, Odra River Board, Varenská 49, 701 26, Ostrava, Czech Republic

Department of Water Structures, Faculty of Civil Engineering, Brno University of Technology, Veveří 331/95, 602 00, Brno, Czech Republic.

Department of Hydraulic Engineering, Faculty of Civil Engineering, Slovak University of Technology in Bratislava, Radlinského 11, 813 68, Bratislava, Slovak Republic

Journal of Hydrology and Hydromechanics

{"article-title":"Discharge coefficient of a rectangular sharp-edged broad-crested weir"}

This paper is concerned with the determination of the relationship for the calculation of the discharge coefficient at free overflow over a rectangular...

Discharge coefficient of a rectangular sharp-edged broad-crested weir

Published Online: Apr 04, 2014

Page range: 145 - 149

DOI: https://doi.org/10.2478/johh-2014-0014

Keywords
Broad-crested weir, Discharge coefficient, Relative height of weir

This content is open access.

Discharge coefficient of a rectangular sharp-edged broad-crested weir

Published Online: Apr 04, 2014

Page range: 145 - 149

DOI: https://doi.org/10.2478/johh-2014-0014

KeywordsBroad-crested weir, Discharge coefficient, Relative height of weir

This content is open access.

Keywords
Broad-crested weir, Discharge coefficient, Relative height of weir