Water Resources Applications Software

Geochemical || Ground Water || Surface Water || Water Quality || General

Summary of GENSCN

       GenScn - GENeration and analysis of model simulation SCeNarios

       Analyzing and managing the high volumes of input and output of
       complex river basin models is a major task.  These models are used
       to simulate water quantity and quality for numerous scenarios of
       changes in land use, land-use management practices, and water-
       management operations.  To assist with that process, an interactive
       computer program, GENeration and analysis of model simulation
       SCeNarios (GenScn), was developed to create simulation scenarios,
       analyze results of the scenarios, and compare scenarios.

       GenScn provides an interactive framework for analysis built around
       an established and adaptable watershed model.  The graphical user
       interface (GUI) uses standard Windows 9x/NT components.  The
       Hydrological Simulation Program--Fortran (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.  MapObjects LT from Environmental Systems Research
       Institute, Inc. (ESRI) is used to provide mapping functionality.

       Note:  References to commercial vendors of software products or
              services is for informational purposes only and does not
              imply endorsement by the U.S. Government.

              MapObjects is a trademark of Environmental Systems Research
              Institute, Inc. Copyright 199_, Environmental Systems
              Research Institute, Inc.  All Rights Reserved.

       Version 1.0 1998/08/14 - Initial release.

       Meteorologic records of precipitation and estimates of potential
       evapotranspiration in a Watershed Data Management (WDM) file are
       required for watershed simulation.  Air temperature, dew point
       temperature, wind, and solar radiation also are required for
       snowmelt.  Air temperature, wind, solar radiation, humidity, cloud
       cover, tillage practices, point sources, and (or) pesticide
       applications may be required for water-quality simulation.  Physical
       measurements and related parameters are required to describe the
       land area, channels, and reservoirs.  If mapping is to be available,
       Geographical Information System (GIS) data in the form of ESRI shape
       files must be included.

       Output options include graphical and tabular display of both
       observed and simulated data.  Output may be viewed interactively or
       written to files.

       For installation of GenScn, 60 megabytes of free disk space is

       To run GenScn, the following are necessary:

         - Windows 9x or Windows NT 4.0 or higher
         - 486 or greater processor, running at 50 megahertz or faster
         - 16 megabytes of memory
         - 60 megabytes of free disk space
         - display resolution of 1024x768

       For optimal performance, the following are recommended:

         - Pentium processor, running at 200 megahertz or faster
         - 64 megabytes of memory
         - 100 megabytes of free disk space
         - display resolution of 1280x1024
         - color printer

       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, Ga., EPA/600/R-97/080, 755 p.

       Donigian, A.S., Jr., Imhoff, J.C., Bicknell, Brian, Kittle, J.L.,
          Jr., 1984, Application guide for Hydrological Simulation
          Program--Fortran (HSPF): U.S. Environmental Protection Agency,
          Environmental Research Laboratory, Athens, Ga., EPA-600/3-84-065,
          177 p.

       Lumb, A.M., McCammon, R.B., and Kittle, J.L., Jr., 1994, Users
          manual for an expert system (HSPEXP) for calibration of the
          Hydrologic Simulation Program--Fortran:  U.S. Geological Survey
          Water-Resources Investigations Report 94-4168, 102 p.

       Berris, S.N., Hess, G.W., and Cartier, K.D, 1996,  Simulation of
          Selected Reservoir Operations in the Upper Truckee River Basin,
          California:  U.S. Geological Survey Fact Sheet FS-082-96, 4 p.

       Bohman, L.R., Berris, S.N., and Hess, G.W., 1995, Interactive
          computer program to simulate and analyze streamflow, Truckee and
          Carson River Basins, Nevada and California: U.S. Geological
          Survey Fact Sheet FS-165-95, 4 p.

       Dinicola, R.S., 1990, Characterization and simulation of rainfall-
          runoff relations for headwater basins in western King and
          Snohomish Counties, Washington:  U.S. Geological Survey Water-
          Resources Investigations Report 89-4052, 52 p.

       Operation and Distribution:
          U.S. Geological Survey
          Hydrologic Analysis Software Support Program
          437 National Center
          Reston, VA 20192

       Official versions of U.S. Geological Survey water-resources analysis
       software are available for electronic retrieval via the World Wide
       Web (WWW) at:


       and via anonymous File Transfer Protocol (FTP) from:

         (path: /pub/software).

       The WWW page and anonymous FTP directory from which the GenScn
       software can be retrieved are, respectively:


       If you would like to obtain the price of and (or) order paper copies
       of USGS reports, contact the USGS Branch of Information Services at:

                  USGS Information Services
                  Box 25286
                  Denver Federal Center
                  Denver, CO 80225

       To inquire about Open-File Reports or Water-Resources Investigations
                  Tel: 303-202-4200; Fax 303-202-4695

       To inquire about other USGS reports:
                  Tel: 303-202-4700; Fax 303-202-4693

       annie(1) - Program to list, table, plot data in a WDM file
       feq(1) - Full EQuations Model
       hspexp(1) - Expert system for calibration of HSPF
       hspf(1) - Hydrological Simulation Program--Fortran
       iowdm(1) - Program to store time-series data in a WDM file
       wdm(1) - Watershed Data Management system

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