Parapet Wall Effect on Piano Key Weir Efficiency
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VIEW THE REPLYPublication: Journal of Irrigation and Drainage Engineering
Volume 139, Issue 6
Abstract
The piano key weir is a cost-effective solution for rehabilitation as well as for new dam projects with a high level of constraints (e.g., limited space, high specific flood discharge, small reservoir level variation). Although the higher efficiency of the piano key weir compared with standard linear weirs has already been demonstrated, its optimal geometry is still poorly defined. To improve the design of the complex geometry of this structure, the use of parapet walls has been tested. They consist of vertical extensions placed over the weir crest. Following a former study of the influence of the weir height on its discharge capacity, this paper presents the results of an experimental campaign dedicated to investigating the effect of parapet walls to increase weir height while reducing bottom slopes and keeping the weir height constant. These results indicate the relative influences of the alveoli bottom slopes and of the weir height on the piano key weir release capacity. Comparisons with former experimental results are also provided.
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Acknowledgments
This research has been realized thanks to the Belgian Fund for Education to Industrial and Agricultural Research (FRIA).
References
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Information & Authors
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Published In
Journal of Irrigation and Drainage Engineering
Volume 139 • Issue 6 • June 2013
Pages: 506 - 511
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Oct 5, 2011
Accepted: Nov 20, 2012
Published online: Nov 22, 2012
Published in print: Jun 1, 2013
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