Simple design criterion for residual energy on embankment dam stepped spillways

Felder, Stefan and Chanson, Hubert (2016) Simple design criterion for residual energy on embankment dam stepped spillways. Journal of Hydraulic Engineering, 142 4: 1-11. doi:10.1061/(ASCE)HY.1943-7900.0001107

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Author Felder, Stefan
Chanson, Hubert
Title Simple design criterion for residual energy on embankment dam stepped spillways
Journal name Journal of Hydraulic Engineering   Check publisher's open access policy
ISSN 0733-9429
Publication date 2016-04
Year available 2015
Sub-type Article (original research)
DOI 10.1061/(ASCE)HY.1943-7900.0001107
Open Access Status Not Open Access
Volume 142
Issue 4
Start page 1
End page 11
Total pages 11
Place of publication Reston, VA, United States
Publisher American Society of Civil Engineers
Collection year 2016
Language eng
Formatted abstract
The stepped spillway design is associated with significant flow resistance and associated energy dissipation on the steps, yielding smaller, more economical downstream dissipation structures. A number of design guidelines were developed for steep stepped spillways typical of concrete gravity dams. The focus of this study is on embankment stepped spillways. A large set of air-water flow data is compared with reanalyzed data sets to provide a simple unifying design approach for the residual energy at the stepped chute’s downstream end and to highlight the uncertainties involved. The results provided some simple design criteria in terms of the dimensionless residual energy of stepped chutes with flat steps. It is believed that a stepped design with a 1V∶2.5H slope (θ = 21.8°) might be optimum in terms of energy dissipation performances. The Darcy-Weisbach friction factors were close for all stepped data ranging between 0.1 ≤ fe ≤ 0.4.
Keyword Stepped spillways
Design method
Embankment dams
Energy dissipation
Residual energy
Flow resistance
Air-water flows
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Article number 04015062 Published online on 19 November 2015

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2016 Collection
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Citation counts: TR Web of Science Citation Count  Cited 0 times in Thomson Reuters Web of Science Article
Scopus Citation Count Cited 1 times in Scopus Article | Citations
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Created: Thu, 17 Mar 2016, 06:44:33 EST by Hubert Chanson on behalf of School of Civil Engineering