HDS-5 Inlet Control Equations

INLET CONTROL EQUATIONS A.1 INTRODUCTION This appendix contains the inlet control equations used to develop the design charts of this publication (HDS-5). Section A.2 contains the equations for the unsubmerged and submerged inlet control equations. Section A.3 demonstrates how the Section A.2 equations are used to create dimensionless design curves for culvert shapes with coefficients […]

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HY-8 Polynomial Coefficients

HY-8: POLYNOMIAL COEFFICIENTS Table 1. Polynomial Coefficients – Circular HY-8 Equation Inlet Configuration KE SR A BS C DIP EE F 1 Thin Edge Projecting 0.9 0.5 0.187321 0.56771 -0.156544 0.0447052 -0.00343602 8.96610E-05 2 Mitered to Conform to Slope 0.7 -0.7 0.107137 0.757789 -0.361462 0.1233932 -0.01606422 0.00076739 3 Square Edge with Headwall (Steel/Aluminum/Corrugated PE) 0.5 […]

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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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HDS-5 Design of Highway Culverts, 3rd Ed

Author(s): Schall JD, Thompson PL, Zerges SM, Kilgore RT Publisher: FHWA Year: 2012 Links: PDF, HTML (1985 edition) Subjects: Culverts Hydraulic Design Series Number 5 (HDS 5) originally merged culvert design information contained in Hydraulic Engineering Circulars (HEC) 5, 10, and 13 with other related hydrologic, storage routing and special culvert design information. This third […]

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HEC-10 Capacity Charts For The Hydraulic Design of Highway Culverts

Author(s): LA Herr Publisher: FHWA Year: 1972 Links: PDF Subjects: Culverts This circular contains a series of hydraulic capacity charts which permit the direct selection of a culvert size for a particular site without making detailed computations. The charts in this circular do not replace the nomographs of Hydraulic Engineering Circular No. 5 (HEC No. […]

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HEC-13 Hydraulic Design of Improved Inlets for Culverts

Author(s): L.J. Harrison, J.L. Morris, J.M. Normann, F.L. Johnson Publisher: FHWA Year: 1972 Links: PDF Subjects: Culverts This manual provides hydraulic design methods for circular and rectangular culverts with improved inlets. Improved inlets are bevels, side-tapers, and slope-tapers which are modifications to the culvert entrance geometry . These improvements can greatly increase the performance of […]

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Concrete Pipe Design Manual

Author(s): ACPA Publisher: American Concrete Pipe Association Year: 2011 Links: PDF Subjects: Culverts, Pipes, RCP This manual is a compilation of data on concrete pipe, and it was planned to provide all design information needed by the engineer when he/she begins to consider the type and shape of pipe to be used. All equations used […]

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