Draft
USER’S MANUAL
for
ENVIRONMENTAL FLUID DYNAMICS CODE
Hydro Version
(EFDC-Hydro)
Release 1.00
for
U.S. Environmental Protection Agency
Region 4
Atlanta, GA
by
Tetra Tech, Inc.
10306 Eaton Place, Suite 340
Fairfax, Virginia 22030
August 1, 2002
ii
Preface
This document comprises Volume I of the first release of a user’s manual for the Environmental Fluid
Dynamic Code, EFDC. A special version of named EFDC-Hydro has been developed for U.S. EPA
Region 4. EFDC-Hydro contains only the hydrodynamic, temperature, dye, and sediment transport
routines. In this manual, the terminology EFDC and EFDC-Hydro are considered synonymous.
Volume I, comprised of 12 chapters and two appendices discusses the general structure of the EFDC
model, grid generation and preprocessing, construction of input files, and post processing of output files.
Volume II of the manual contains Appendix C , which is devoted to specific model applications. It is
anticipated that the user’s manual may be updated from time-to-time as significant features are added to
the code. This manual will be released as an Adobe PDF electronic file.
iii
Acknowledgments
The primary support for the initial development of the Environmental Fluid Dynamics Code was
provided by the Commonwealth of Virginia by a special initiative appropriation to the Virginia Institute
of Marine Science, The College of William and Mary. Prior to 1996, additional funding for the
continued development of the EFDC model was provided by the U.S. Environmental Protection
Agency, Exploratory Research Program through a grant to the Virginia Institute of Marine Science.
Subsequent to 1996, primary support for the development and maintenance of EFDC has been
provided by various USEPA programs and by Tetra Tech, Inc. The development of EFDC Hydro and
this user’s manual was supported by the U.S. Environmental Protection Agency, Region 4, under
contract 68-C-99-249.
iv
Disclaimer
The EFDC model is capable of simulating a diverse range of environment flow and transport problems,
often addressing critical questions related to both human health and safety and the health of natural
ecosystems. However since the EFDC model is considered public domain and freely distributed, the
author, the Virginia Institute of Marine Science, the College of William and Mary, the U.S.
Environmental Protection Agency, and Tetra Tech, Inc., disclaim any and all liability which may be
incurred by the use of the EFDC code for engineering, environmental assessment, and management
purposes.
v
Table of Contents
Page
Preface ii
Acknowledgment iii
Disclaimer iv
Contents v
List of Figures vii
List of Tables ix
1. Introduction 1-1
2. General Structure of the EFDC Modeling System 2-1
3. Grid Generation and Preprocessing 3-1
4. The Master Input File 4-1
5. Additional Input Files 5-1
6. Compiling and Executing the Code 6-1
7. Diagnostic Options and Output 7-1
8. Time Series Output and Analysis 8-1
9. Two-Dimensional Graphics Output and Visualization 9-1
10. Three-Dimensional Graphics Output and Visualization 10-1
11. Miscellaneous Output Files 11-1
12. References 12-1
Appendix A: EFDC Subroutines and Their Functions A-1
Appendix B: Grid Generation Examples B-1
