Influence of weir height and keys slope on PKW discharge

Machiels, Olivier; Erpicum, Sébastien; Archambeau, Pierre; Dewals, Benjamin; Pirotton, Michel

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Influence of weir height and keys slope on PKW discharge

Machiels, Olivier; Erpicum, Sébastien; Archambeau, Pierre et al.

2012 • In Proceedings of 4th IAHR International Symposium on Hydraulic Structures

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https://hdl.handle.net/2268/114783

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Abstract :

[en] Piano Key Weir is a cost effective solution for rehabilitation as well as for new dam projects with a high level of constraints (limited space, high specific flood discharge, small reservoir level variation). While the higher efficiency of the Piano Key Weir compared to standard linear weirs has already been demonstrated, its optimal geometry is still poorly defined. Even if former studies highlighted the main influence of the weir height on its discharge capacity, the distinction between weir height effect and keys slope one is not so straight forward. In order to distinguish the influence of these two parameters, the use of parapet walls has been tested to increase weir height keeping bottom slope constant, and to decrease keys slope keeping the weir height constant. The experimental results presented in this paper enable to distinguish the relative influences of the keys bottom slope and of the weir height on the Piano Key Weir release capacity. Comparisons with former experimental results as well as design guidelines are also provided.

Research Center/Unit :

Aquapôle - ULiège

Disciplines :

Civil engineering

Author, co-author :

Machiels, Olivier ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > HECE (Hydraulics in Environnemental and Civil Engineering)

Erpicum, Sébastien ; Université de Liège - ULiège > Services généraux (Faculté des sciences appliquées) > Scientifiques attachés au Doyen (Sc.appliquées)

Archambeau, Pierre ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > HECE (Hydraulics in Environnemental and Civil Engineering)

Dewals, Benjamin ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydraulics in Environmental and Civil Engineering

Pirotton, Michel ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > HECE (Hydraulics in Environnemental and Civil Engineering)

Language :

English

Title :

Influence of weir height and keys slope on PKW discharge

Publication date :

2012

Event name :

4th IAHR International Symposium on Hydraulic Structures

Event organizer :

IAHR & APRH

Event place :

Porto, Portugal

Event date :

9-11 February 2012

Audience :

International

Main work title :

Proceedings of 4th IAHR International Symposium on Hydraulic Structures

Publisher :

APRH, Lisboa, Portugal

ISBN/EAN :

978-989-8509-01-7

Peer reviewed :

Peer reviewed

Available on ORBi :

since 19 March 2012

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Scopus citations^®
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Bibliography

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