FLOOD02273

• County: Statewide
• Community: State of Colorado
• Stream Name: All
• Basin: Statewide
• Title: Hydraulic Design of Energy Dissipators for Culverts and Channels
• Date: 12/1/1975
• Prepared For: USDOT
• Prepared By: Federal Highway Administration
• Floodplain - Doc Type: Educational/Technical/Reference Information

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PREFACE

The purpose of this circular is to provide design information
for analyzing energy dissipation problems at culvert outlets
and in open channels. The first five chapters of the circular
provide general information to support the remaining design
chapters. Design chapters VI-XI cover the general types of
dissipators: hydraulic jump, forced hydraulic jump, impact,
drop structure, stilling well, and riprap. The design concept
presented in chapter I is illustrated in chapter 12, Design
Selection. In this chapter, the different dissipator types
are compared using design problems.

Much of the information presented has been taken from the
literature and adapted, where necessary, to fit highway needs.
Recent research results have been incorporated, wherever
possible, and a field survey was conducted to determine the
States' present practice and experience.

ACKNOWLEDGMENTS

This circular was prepared as an integral part of Demonstration
Project No. 31, "Hydraulic Design of Energy Dissipators for
Culverts and Channels," sponsored by Region 15. Hr. Philip L.
Thompson of Region 15 and Mr. Murray L. Corry of the Hydraulics
Branch wrote sections, coordinated, and edited the circular.
Dr. F. J. Watts of the University of Idaho (on a year assign-
ment with the Hydraulics Branch), Hr. Dennis L. Richards of
the Hydraulics Branch, Mr. J. Sterling Jones of the Office
of Research, and Mr. Joseph N. Bradley, Consultant to the
Hydraulics Branch, contributed substantially by writing sections
of the circular. Mr. Frank L. Johnson, Chief, Hydraulics
Branch and Hr. Gene Fiala, Region 10 Hydraulics Engineer,
supported the authors by reviewing and discussing the drafts
of the circular. Mr. John Morris, Region 4 Hydraulics Engineer,
collected research results and assembled a preliminary manual
which was used as an outline for the first draft. !lrs. Linda L.
Gregory and Mrs. Silvia M. Rodriguez of Region 15 Word Processing
Center and Mrs. Willy Rudolph of the Hydraulics Branch aided
in manual preparation.

The authors wish to express their gr~titude to the many
individuals and organizations whose research and designs are
incorporated into this circular.

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For BIlle by the Superintendent of Doeumenta, U.S. Government Printing Oftlee
Washington, D.C. 20402. Price $4.70
Stock Number 050-002-00102-7