PHREEQCI--A graphical user interface to the geochemical model PHREEQC

U.S. Department of the Interior USGS Fact Sheet FS-031-02 U.S. Geological Survey April 2002 Figure 1. Main screen of P HREEQCI, with the SOLUTION keyword dialog box open. PHREEQCI Version 2 is a complete Windows-based graphical user interface to the geochemical computer program PHREEQC (Version 2). P HREEQCI can be used interactively to perform all the modeling capabilities of PHREEQC— speciation, batch-reaction, onedimensional (1D) reactive-transport, and inverse modeling.