U.S. Geological Survey                                 phreeqci(1)



NAME
      phreeqci - Graphical user interface for PHREEQC

ABSTRACT
     PhreeqcI Version 2 is a complete Windows-based graphical 
     user interface to the geochemical computer program PHREEQC 
     (Version 2). PhreeqcI can be used interactively to perform
     all the modeling capabilities of PHREEQC-speciation, 
     batch-reaction, one-dimensional (1D) reactive-transport, 
     and inverse modeling. 

     Data for PhreeqcI may be read from a PHREEQC input file, 
     entered through a line editor, or entered through screen-
     driven input. Each keyword data block of PHREEQC has a 
     corresponding input screen with tabbed panes for input of 
     all data related to the keyword. Balloon help is available 
     for all buttons; when a data field receives the focus, a 
     description of the data field appears at the bottom of the
     screen; and the complete PHREEQC version 2 manual is 
     available through the help menu.

DATA REQUIREMENTS
     Use of the program requires adequate knowledge of
     geochemistry and a proper formulation of the problem. 

SYSTEM REQUIREMENTS
     For installation of PHREEQCI, 20 megabytes of free disk space 
	is needed.

     To run PHREEQCI, the following is necessary:
        - Windows 2000 or higher

DOCUMENTATION
     Charlton, S.R., and Parkhurst, D.L., 2002, PhreeqcI--A graphical user
        interface to the geochemical model PHREEQC: U.S. Geological Survey 
        Fact Sheet FS-031-02, 2 p.

     Parkhurst, D.L., and Appelo, C.A.J., 1999, User's guide to
        PHREEQC (Version 2)--a computer program for speciation,
        batch-reaction, one-dimensional transport, and inverse
        geochemical calculations: U.S. Geological Survey Water-
        Resources Investigations Report 99-4259, 312 p.

RELATED DOCUMENTATION

     Charlton, S.R., Macklin, C.L. and Parkhurst, D.L., 1997,
        PHREEQCI--a graphical user interface for the geochemical
        computer program PHREEQC: U.S. Geological Survey Water-
        Resources Investigations Report 97-4222, 9 p.

     Parkhurst, D.L., Kipp, K.L., and Charlton, S.R., 2010,
        PHAST Version 2--A program for simulating groundwater flow,
        solute transport, and multicomponent geochemical 
        reactions: U.S. Geological Survey Techniques and Methods
        6-A35, 235 p.

     Parkhurst, D.L., Thorstenson, D.C., and Plummer, L.N., 1980,
        PHREEQE--a computer program for geochemical calculations:
        U.S. Geological Survey Water-Resources Investigations
        Report 80-96, 195 p. (Revised and reprinted, 1990.)

     Plummer, L.N., Parkhurst, D.L., Fleming, G.W., and Dunkle,
        S.A., 1988, A computer program incorporating Pitzer's
        equations for calculation of geochemical reactions in
        brines: U.S. Geological Survey Water-Resources
        Investigations Report 88-4153, 310 p.

     Plummer, L.N., Prestemon, E.C., and Parkhurst, D.L., 1991,
        An interactive code (NETPATH) for modeling NET
        geochemical reactions along a flow PATH:  U.S.
        Geological Survey Water-Resources Investigations Report
        91-4078, 227 p.

     Plummer, L.N., Prestemon, E.C., and Parkhurst, D.L., 1994,
        An interactive code (NETPATH) for modeling NET
        geochemical reactions along a flow PATH--version 2.0:
        U.S. Geological Survey Water-Resources Investigations
        Report 94-4169, 130 p.

REFERENCES
     Appelo, C.A.J., and Postma, D., 2005, Geochemistry,
        groundwater and pollution, 2nd Edition: Leiden, 
        The Netherlands, A.A. Balkema.

     Appelo, C.A.J., and Postma, D., 1993, Geochemistry,
        groundwater and pollution:  Rotterdam, Netherlands, and
        Brookfield, Vermont, A.A. Balkema.

     Appelo, C.A.J., and Willemsen, A., 1987, Geochemical
        calculations and observations on salt water intrusions.
        I: A combined geochemical/mixing cell model: Journal of
        Hydrology, v. 94, p. 313-330.

     Parkhurst, D.L., and Plummer, L.N., 1993, Geochemical
        models, in Alley, W.M., ed., Regional ground-water
        quality: New York, Van Nostrand Reinhold, chap. 9, p.
        199-225.

     Plummer, L.N., 1984, Geochemical modeling: A comparison of
        forward and inverse methods, in Hitchon, B., and Wallick,
        E.I., eds., Proceedings First Canadian/American
        Conference on Hydrogeology--Practical Applications of
        Ground Water Geochemistry, Banff, Alberta, Canada:
        Worthington, Ohio, National Water Well Association, p.
        149-177.

TRAINING
     PHREEQC is taught as part of the courses Geochemistry for
     Ground-Water Systems (GW3021TC) at the USGS National
     Training Center.

CONTACTS
     U.S. Geological Survey
     David Parkhurst
     Denver Federal Center, MS 413
     Lakewood, CO  80225

     dlpark@usgs.gov 
     h2osoft@usgs.gov

     URL: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqci