Availability of GenScn, a Tool for the Generation and Analysis of Model Simulation Scenarios for Watersheds

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        "Annette L Ledford, Office Automation Asst, Reston, VA " aledford@usgs.gov
Subject: OSW Technical Memorandum No. 99.03

Date: Tue, 26 Jan 1999 09:36:12 -0500
From: "Annette L Ledford, Office Automation Asst, Reston, VA " aledford@usgs.gov

In Reply Refer To:
Mail Stop 415

January 4, 1999


Subject:  Availability of GenScn, a Tool for the Generation and Analysis 
          of Model Simulation Scenarios for Watersheds

The purpose of this memorandum is to announce the availability of the 
GenScn program and to distribute Water Resources Investigations Report 
(WRIR) 98-4134, "A Tool for the Generation and Analysis of Model 
Simulation Scenarios for Watersheds (GenScn)," by John L. Kittle, Jr., 
Alan M. Lumb, Paul R. Hummel, Paul B. Duda, and Mark H. Gray. Both the 
program and documentation may be downloaded from the USGS World Wide Web 
site at http://water.usgs.gov/software/surface_water.html.

GenScn assists hydrologists and water managers in developing water 
quantity and water quality simulations of land use alternatives, 
land-management practices, river diversions, and reservoir operations. 
GenScn provides a number of capabilities that assist in the modeling 
process, including  the creation of model input files from spatial 
information and applications and the capability to view or compare the 
selected time series as tables, plots, maps, and statistical summaries. 
Special features of GenScn are animation of time series in longitudinal 
plots and animation of user-defined critical thresholds along specific 
river reaches displayed on a map.

GenScn provides a graphical user interface (GUI) that uses standard 
Windows 9x/NT components built around established and adaptable 
hydrologic simulation models.  MapObjects LT from Environmental Systems 
Research  Institute, Inc. (ESRI) is used to provide mapping functionality.

GenScn fully supports the Hydrological Simulation Program--Fortran 
(HSPF).  HSPF is used for simulating the hydrologic and associated water 
quality processes on pervious and impervious land surfaces and in streams 
and well-mixed impoundments.  HSPF is contained in the GenScn program and 
also is available separately at the above web site.  The display and 
analysis tools of GenScn are also compatible with special output routines 
provided in the Full Equations (FEQ) model for one-dimensional, unsteady 
open-channel flow.  FEQ can be used to route the flows generated by HSPF 
wherever unsteady-flow simulation is required. FEQ is available 
separately at the above web site.

The GenScn documentation includes a detailed  tutorial for using the 
program.  The data used in the tutorial is included in the program 
distribution.  The GenScn and HSPF program documentation is included in 
Windows Help format with the program distribution.

Partial funding for GenScn came from the Nevada District in support of 
the Truckee-Carson Program (http://nevada.usgs.gov/tcp/), the Illinois 
District, in cooperation with Dupage County, Illinois 
(http://www-il.usgs.gov/proj/feq/), and the National Water-Quality 
Assessment (NAWQA) Program.

For more information on GenScn or HSPF or additional copies of the 
documentation, contact Kate Flynn (kmflynn, 703-648-5313).  For more 
information on FEQ, contact Steve Melching (csmelchi, 217-344-0037, 
x-3031) or Audrey Ishii (alishii 217-344-0037, x-3026). 

Training on the application of HSPF and GenScn is included in Watershed 
Systems Modeling I (SW2008TC, offered annually at the National Training 
Center) and in irregularly scheduled workshops sponsored by EPA and other 
agencies; for more information, contact Kate Flynn.  Training on FEQ may 
be offered if there is enough interest; contact Steve Melching or Audrey 
Ishii for more information.

See also OSW Technical Memorandum 98.03, dated February 10, 1998 


Kittle, J.L., Jr., Lumb, A.M., Hummel, P.R., Duda, P.B., Gray, M.H., 
1998, A tool for the generation and analysis of model simulation 
scenarios for watersheds (GenScn):  U.S. Geological Survey 
Water-Resources Investigations Report 98-4134, 152 p. 

Bicknell, B.R., Imhoff, J.C., Kittle, J.L., Jr., Donigian, A.S., Jr., and 
 Johanson, R.C., 1997, Hydrological Simulation Program--Fortran: User's 
manual  for version 11: U.S. Environmental Protection Agency, National 
Exposure Research Laboratory, Athens, Georgia, EPA/600/R-97/080, 755 p.

Franz, D.D., and Melching, C.S., Full Equations (FEQ) Model for the 
Solution of the Full, Dynamic Equations of Motion for One-Dimensional 
Unsteady Flow in Open Channels and Through Control Structures: U.S. 
Geological Survey Water-Resources Investigations Report 96-4240, 258 P.

                                      Thomas H. Yorke
                                      Chief, Office of Surface Water


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