#SWMM3 and #SWMM4 Acknowledgments, includes mention of #PCSWMM

A note from the past, the SWMM3 and SWMM4 Acknowledgments from their respective manuals for the sake of posterity and in thanks for all of their past efforts.

SWMM4 Acknowledgments

Maintenance and updating of the EPA SWMM has been continuous since its
inception in 1969-70.

Over the many intervening years many individuals have contributed to its improvement, notably EPA colleagues Mr. Richard Field, Mr. Harry Torno, Mr. Chiu-Yuan Fan, Mr. Doug Ammon and Mr. Tom Barnwell. Mr. Torno and Mr. Barnwell have also managed the Storm and Water Quality Model Users Group (formerly the SWMM Users Group), a source of invaluable feedback from model users, including a large contingent from Canada and abroad.

Too many individuals have contributed to specific improvements to list here. This users manual, however, is based upon earlier versions to which the following persons contributed significant authorship while at the University of Florida: Mr. Brett A. Cunningham, Mr. Victor Gagliardo, Dr.Stephen J. Nix, Mr. Donald J. Polmann and Mr. W. Alan Peltz. In particular, Mssrs. Cunningham and Gagliardo developed the new subsurface routing routine in the Runoff Block. Dr. James P.Heaney has served staunchly as colleague, critic, and pioneer of new ideas. Omission of these names from the current list of authors does not diminish our gratitude for current and past efforts in developing the model.

The Extran Block is one of the most valuable and widely-used components of SWMM. Dr. Larry A. Roesner and Mr. John A. Aldrich of Camp, Dresser and McKee, Inc., one of the three original SWMM developers, have given generously of their time to enhance Extran and to provide useful suggestions for improvements of Extran and the rest of the SWMM model. The Fortran-77 code for Version 4 of SWMM is based on a microcomputer version prepared by Mr. Richard M. Baker and Mr. Karl J. Brazauskas of Metcalf and Eddy, Inc., another one of the original three developers. Much of the user’s manual text for Version 4 has been adapted from a computerized edition of the Version 3 manuals prepared by Dr. William James of Wayne State University. We are grateful to Dr. James and to Dr. Stephen Nix of Syracuse University for their helpful comments regarding Version 4. Assistance in printing of the manuals was provided by KBN Applied Sciences and Engineering, Inc. of Gainesville.

At the University of Florida, invaluable word-processing and SWMM dissemination duties have been performed faithfully by Ms. Doris Smithson. Main-frame computations were performed at the Northeast Regional Data Center on the University of Florida campus, Gainesville.

SWMM3 Acknowledgements

Maintenance and updating of the EPA SWMM has been continuous since its
inception in 1969-70. Over the several intervening years, many
individuals have contributed to its improvement, most notably EPA
col­leagues Richard Field, Harry Torno, Chi-Yuan Fan, Doug Ammon and
Tom Barnwell. Harry Torno and Tom Barnwell have also managed the SWMM
Users Group, through which many helpful suggestions for improvements
have come, including those from the large contingent of Canadian
users.

Regarding specific components of SWMM Version III, the Green-Ampt
infiltration routines were reviewed, programmed and tested by Dr.
Russell G. Mein, Department of Civil Engineering, Monash University,
Clayton, Victoria, Australia while on a sabbatical at the University
of Florida. He also provided valuable review and testing of other
model components. The earliest implementation of continuous simulation
in the Runoff and Storage/Treatment Blocks was done by George F.
Smith, now with the Office of Hydrology, National Weather Service,
Silver Spring, Maryland. Basic formulation of the snowmelt routines
was done following the work of Proctor and Redfern, Ltd. and James F.
MacLaren, Ltd., Toronto, who were under contract to the Ontario
Ministry of the Environment and the Canadian Environmental Protection
Service. Runoff Block surface quality changes were the subject of
masters research at the University of Florida by Douglas C. Ammon, now
with the EPA, Storm and Combined Sewer Branch, Cincinnati. Revision of
Transport Block scour/deposition routines is based on work with Dennis
Lai, Clinton-Bogert Associates, Fort Lee, New Jersey. Many lasting
improvements in SWMM programming were made by W. Alan Peltz, now with
General Electric, Atlanta.

Several others contributed to changes in the model. The card ID system
and the user-defined default values and ratios were suggested by the
Corps of Engineers, Hydrologic Engineering Center, Davis, California.
The programming basis has been aided by Dr. William James, McMaster
University, Hamilton, Ontario and exposure to his FASTSWMM programs.
Emphasis upon proper use and objectives of SWMM modeling has been
enhanced by conversations with the late Murray McPherson, Marblehead,
Massachusetts, Eugene Driscoll, Oakland, New Jersey, Dr. Dominic
DiToro, Manhattan College, New York City, John Mancini, Lincoln,
Nebraska, Dr. Paul Wisner, Ottawa University, Charles Howard,
Vancouver, B.C., and several others. OF is additionally grateful to
Reinhard Sprenger, Templeton Engineering, Winnipeg, for improvements
to the Extran Block, to Christian Eicher, Gore and Storrie, Ltd.,
Toronto, for several important corrections to the overall program, to
Robert Johnson, Lehigh University, Bethlehem, Pennsylvania, for
comments on the compatibility with CDC machines, to Tom Jewell, Union
College, Schenectady, New York, for analysis of surface washoff and
other comments, and to Tom Meinholz and Richard Race, formerly of
Envirex, Inc., Milwaukee, for suggestions on making the program more
suitable to prototype configurations.

The Extended Transport Block has been an invaluable addition to the
SWMM package. Developed by Water Resources Engineers (now a part of
Camp, Dresser and McKee), Extran may be the most widely used portion
of SWMM. Dr. Larry Roesner and the late Dr. Robert Shubinski of CDM,
Annan­dale, Virginia have given generously of their time in enhancing
Extran and in making other useful suggestions to SWMM modeling.

At the University of Florida, salutary programming and testing has
been conducted by J. Jay Santos, Efi Foufoula, Michael Kennedy, Kelly
Nead and Christina Neff. Typing has been performed by Linda Trawick,
Jeanette Heeb, Kim Karr and the College of Engineering Word Processing
Center. Figures were drafted by Terri Schubert, Micky Hartnett and
Anelia Crawford. Computations were performed at the Northeast Regional
Data Center on the University of Florida campus, Gainesville.

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