Water Resources Applications Software

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Summary of ZONEBDGT

       zonebdgt - Program for computing subregional water budgets for
                  MODFLOW ground-water flow models

       Zonebudget (ZONEBDGT) is a computer program that computes
       subregional water budgets using results from the MODFLOW ground-
       water flow model.  The user designates the subregions by specifying
       zone numbers.  A separate budget is computed for each zone.  The
       budget for a zone includes a component of flow between each adjacent

       ZONEBDGT reads a file of budget data that MODFLOW can write.  This
       file must contain values for each flow component at every model
       cell.  ZONEBDGT then accumulates each flow component for all the
       cells in each specified zone.

       Version 1.0 1996/12/20 - version published in USGS OFR 90-392.  Note
          that this version will not work with cell-by-cell budget files
          that are written using the optional compact format available in
          MODFLOW-96.  That is, to use ZONEBDGT version 1.0 with
          MODFLOW-96, the compact cell-by-cell budget option must NOT be

       In order to use ZONEBDGT, all cell-by-cell budget terms for a
       MODFLOW simulation must be saved in a file when MODFLOW is executed.
       The cell-by-cell budget file must be written in the format used by
       MODFLOW-88 (as opposed to the COMPACT format, which is a new option
       in MODFLOW-96).  Depending on the specific zones that are desired, a
       zone file must also be prepared.

       The output is a listing file that contains a flow budget for each

       ZONEBDGT is written in Fortran 77.  By default, the software is
       dimensioned for use with models having up to 90,000 cells.
       Generally, the program is easily installed on most computer systems.
       The code has been used on UNIX-based computers and DOS-based 386 or
       greater computers having a math coprocessor and 2 mb of memory.

       Harbaugh, A.W., 1990, A computer program for calculating subregional
          water budgets using results from the U.S. Geological Survey
          modular three-dimensional ground-water flow model: U.S.
          Geological Survey Open-File Report 90-392, 46 p.

       McDonald, M.G., and Harbaugh, A.W., 1988, A modular three-
          dimensional finite-difference ground-water flow model: U.S.
          Geological Survey Techniques of Water-Resources Investigations,
          book 6, chap. A1, 586 p.

       Harbaugh, A.W., 1990, A simple contouring program for gridded data:
          U.S. Geological Survey Open-File Report 90-144, 37 p.

       Harbaugh, A.W., and McDonald, M.G., 1996, User's documentation for
          MODFLOW-96, an update to the U.S. Geological Survey modular
          finite-difference ground-water flow model: U.S. Geological Survey
          Open-File Report 96-485, 56 p.

       Modeling of Ground-Water Flow Using Finite-Difference Methods
       (GW2096TC), offered annually at the USGS National Training Center,
       makes use of ZONEBDGT.

          U.S. Geological Survey
          Office of Ground Water
          Arlen Harbaugh
          411 National Center
          Reston, VA 20192

          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 ZONEBDGT
       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:

                  U.S. Geological Survey
                  Branch of Information Services
                  Denver Federal Center, Box 25286
                  Denver CO 80225-0286

       To inquire about Open-File Reports or Water-Resources Investigations
                  Tel: 303-202-4210; Fax 303-202-4695

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

       contour(1) - A contouring program for gridded data
       modflow(1) - Modular three-dimensional ground-water flow
       Modflowp(1) - Parameter-estimation version of the modular model

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