Energy dissipation on embankment dam stepped spillways, overflow stepped weirs and masonry stepped spillways

Chanson, Hubert and Felder, Stefan (2010). Energy dissipation on embankment dam stepped spillways, overflow stepped weirs and masonry stepped spillways. In: Bruce Melville, Gregory De Costa and Tony Swann, 17th Congress of IAHR Asia and Pacific Division, IAHR-APD, Auckland, New Zealand, (1-10). 21-24 February 2010.

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Author Chanson, Hubert
Felder, Stefan
Title of paper Energy dissipation on embankment dam stepped spillways, overflow stepped weirs and masonry stepped spillways
Conference name 17th Congress of IAHR Asia and Pacific Division, IAHR-APD
Conference location Auckland, New Zealand
Conference dates 21-24 February 2010
Place of Publication Auckland, New Zealand
Publication Year 2010
Year available 2010
Sub-type Fully published paper
ISBN 9780868691251
Editor Bruce Melville
Gregory De Costa
Tony Swann
Start page 1
End page 10
Total pages 11
Collection year 2011
Language eng
Formatted Abstract/Summary
Stepped spillways are designed to increase the rate of energy dissipation on the chute reducing the size of a downstream energy dissipator. The prediction of the turbulent dissipation above the steps constitutes a critical part of the design process, especially at large discharges per unit width corresponding to the skimming flow regime. Herein new measurements were conducted in a large facility with a channel slope of 26.6º and step heights of 0.10 m. The experiments were performed with large discharges corresponding to Reynolds numbers ranging from 5×104 to 1×106. The waters were highly turbulent and they dissipated a major proportion of the flow kinetic energy. Taking into account the free-surface aeration, the present results were compared with recent results on 15.9º and 21.8º slopes; the range of slopes (1V:3.5H to 1V:2H) was typical of embankment slopes and older spillway designs. The comparative results yielded some simple design guidelines applicable to masonry stepped spillways, embankment dam stepped chutes and overflow stepped weirs.
Subjects 090509 Water Resources Engineering
970109 Expanding Knowledge in Engineering
Keyword Stepped spillways
Masonry dams
Embankment dams
Energy Dissipation
Overflow stepped weirs
Turbulent kinetic energy dissipation
Air-water flows
Residual energy
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Created: Mon, 08 Mar 2010, 08:07:41 EST by Hubert Chanson on behalf of School of Civil Engineering