06 April 2018 Hi, I was wondering how the riprap apron design values are calculated since they seem to include the slope value which does not appear in the HEC-14 equation from Fletcher and Grace (1972). Regards, Simon
Plainwater
Civil engineers for a better world
HEC 14: Riprap Apron
10.2 RIPRAP APRON The most commonly used device for outlet protection, primarily for culverts 60 in (1500 mm) or smaller, is a riprap apron. An example schematic of an apron taken from the Central Federal Lands Division of the Federal Highway Administration is shown in Figure 10.4. Figure 10.4. Placed Riprap at Culverts (per Central […]
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HEC-14 Hydraulic Design of Energy Dissipators for Culverts and Channels
Author(s): Philip L. Thompson and Roger T. Kilgore Publisher: FHWA Year: 2006 Links: PDF Subjects: energy dissipator, culvert, channel, erosion, outlet velocity, hydraulic jump, internal dissipator, stilling basin, impact basin, riprap basin, riprap apron, drop structure, stilling well The purpose of this circular is to provide design information for analyzing and mitigating energy dissipation problems […]
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HEC-14 Riprap Apron
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13,165 total views
