1. General Model Information



Main medium: terrestrial
Main subject: biogeochemistry, hydrology
Organization level: ecosystem
Type of model: not specified
Main application:
Keywords: groundwater, chemical reactions, reaction model, coupled linear equations, coefficient database


U.S. Geological Survey
Hydrologic Analysis Software Support Team
R. Steven Regan
437 National Center
Reston, VA 20192
email: h2osoft@usgs.gov


Parkhurst, D.L.; L.N. Plummer, and D.C. Thorstenson USGS


USGS program to calculate mass transfer for reactions in groundwater. Defines and quantifies reactions between groundwater and minerals. Calculates the mass transfer necessary to account for a change in composition between two water samples. Also models mixing of waters, redox reactions and isotropic composition. Runs as a batch program requiring input files prepared with the pre-processor BALNINPT, or a text editor. The pre-processor automatically accesses a chemical reaction data base, BALNINPT.DAT, included with the software. Contains source code and runtime versions. The documentation includes a description of the underlying principles and the input necessary to run the program, and three examples typical of ground-water systems. BALANCE is no longer maintained by the developers; it has been replaced by the program NETPATH.

II. Technical Information

II.1 Executables:

Operating System(s): Unix based Systems
BALNINPT compiled for...
Data General AViiON (126K) Sun SPARCstation (Solaris) (78K)
The above software can also be accessed via anonymous FTP from h2o.usgs.gov in the /pub/software/geochemical/balninpt directory.

II.2 Source-code:

Programming Language(s): FORTRAN
BALNINPT source code for compilation under...
UNIX (44K)

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

Parkhurst, D.L., Plummer, L.N., and Thorstenson, D.C., 1982, BALANCE--a computer program for calculating mass transfer for geochemical reactions in ground water: U.S. Geological Survey Water-Resources Investigations Report 82-14, 29 p.

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: T. Gabele: 16. 6. 1997 -
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:39 CEST 2002

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