<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>The use of environmentally-friendly materials in hydraulic engineering (e.g. the stone lining of weirs at levees) calls for the more accurate estimation of the discharge coefficient for broad-crested weirs with a rough crest surface. However, in the available literature sources the discharge coefficient of broad-crested weirs is usually expressed for a smooth crest. The authors of this paper have summarized the theoretical knowledge related to the effect of weir crest surface roughness on the discharge coefficient. The method of determination of the head-discharge relation for broad-crested weirs with a rough crest surface is proposed based on known discharge coefficient values for smooth surfaces and on the roughness parameters of the weir. For selected scenarios the theoretical results were compared with experimental research carried out at the Laboratory of Water Management Research, Faculty of Civil Engineering (FCE), Brno University of Technology (BUT).</p></abstract>

The use of environmentally-friendly materials in hydraulic engineering (e.g. the stone lining of weirs at levees) calls for the more accurate estimation of the discharge coefficient for broad-crested weirs with a rough crest surface. However, in the available literature sources the discharge coefficient of broad-crested weirs is usually expressed for a smooth crest. The authors of this paper have summarized the theoretical knowledge related to the effect of weir crest surface roughness on the discharge coefficient. The method of determination of the head-discharge relation for broad-crested weirs with a rough crest surface is proposed based on known discharge coefficient values for smooth surfaces and on the roughness parameters of the weir. For selected scenarios the theoretical results were compared with experimental research carried out at the Laboratory of Water Management Research, Faculty of Civil Engineering (FCE), Brno University of Technology (BUT).

The Influence of Roughness on the Discharge Coefficient of a Broad-Crested Weir

Faculty of Civil Engineering, Institute of Water Structures, Brno University of Technology, Veveří 95, 602 00 Brno, Czech Republic

Journal of Hydrology and Hydromechanics

{"article-title":"The Influence of Roughness on the Discharge Coefficient of a Broad-Crested Weir"}

The use of environmentally-friendly materials in hydraulic engineering (e.g. the stone lining of weirs at levees) calls for the more accurate estimation of the...

The Influence of Roughness on the Discharge Coefficient of a Broad-Crested Weir

Publié en ligne: 14 juin 2012

Pages: 101 - 114

DOI: https://doi.org/10.2478/v10098-012-0009-0

Mots clés
ochranná hráz, přeliv se širokou korunou, součinitel průtoku, drsnost

This content is open access.

The Influence of Roughness on the Discharge Coefficient of a Broad-Crested Weir

Publié en ligne: 14 juin 2012

Pages: 101 - 114

DOI: https://doi.org/10.2478/v10098-012-0009-0

Mots clésochranná hráz, přeliv se širokou korunou, součinitel průtoku, drsnost

This content is open access.

Mots clés
ochranná hráz, přeliv se širokou korunou, součinitel průtoku, drsnost