Hydraulic Design of Stepped Spillways and Downstream Energy Dissipators

Chanson, Hubert (2001) Hydraulic Design of Stepped Spillways and Downstream Energy Dissipators. Dam Engineering, 11 4: 205-242.

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Author Chanson, Hubert
Title Hydraulic Design of Stepped Spillways and Downstream Energy Dissipators
Journal name Dam Engineering
Publication date 2001-01-01
Open Access Status File (Author Post-print)
Volume 11
Issue 4
Start page 205
End page 242
Subject 290802 Water and Sanitary Engineering
Abstract Stepped channels and spillways have been used for centuries. Recently, new construction materials, (e.g. RCC, gabions) and design techniques (e.g. embankment overtopping protection) have increased the interest in stepped chutes. The steps produce considerable energy dissipation along the chute and reduce the size of the required downstream energy dissipation basin. This paper reviews the characteristics of modern stepped spillways. The basic flow patterns are described. Basic equations are developed, taking into account the free surface aeration in skimming flows. The calculations of the residual energy to be dissipated in the downstream dissipator are discussed. Simple design guidelines for the downstream energy dissipators are provided for use by professionals.
Keyword Stepped spillways
Hydraulic energy
Energy dissipation
Stepped chutes

Document type: Journal Article
Collection: School of Civil Engineering Publications
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Created: Thu, 05 Feb 2004, 10:00:00 EST