Hydrogeology Program at University of Illinois

The Geochemist's Workbench® is a set of software tools for manipulating chemical reactions, calculating stability diagrams and the equilibrium states of natural waters, tracing reaction processes, modeling reactive transport, and plotting the results of these calculations.

The package is designed for solving problems in aqueous geochemistry, including those encountered in environmental protection and remediation, the petroleum industry, and economic geology.

For pricing, to order a copy of the GWB, or for information beyond that found below, contact RockWare.

The workbench, designed for IBM-compatible personal computers running MS Windows, is available in three release levels.

GWB Essentials consists of five of the most used and useful modules:

The GWB Standard release includes the above modules plus two programs that add the ability to model reaction processes:

GWB Professional adds the "Xt" programs, which provide for reactive transport modeling:

Each program features a convenient point-and-click interface.

For more details on the programs' capabilities, you can consult the GWB User's Guides:

The "Geochemical Reaction Modeling" text, available from Oxford University Press and from RockWare costs about $50 US and contains a large number of fully-worked examples and applications.

A variety of thermodynamic datasets formatted to be read by the GWB programs are available for downloading. Datasets in the GWB format for modeling radionuclide migration are available from the Waste Isolation Research Division of the Japan Nuclear Cycle Development Insititute (JNC). The Chess website has additional information about thermodynamic databases from various sources.

For a list of frequently-asked questions about the GWB package (and the corresponding answers, of course) see the GWB FAQ page.

You can join gwb_users, an independent group of users who share comments and results and answer questions of general interest. To subscribe (there is no cost), unsubscribe, or post a message, visit the GWB Users' Group home page.

For information about a variety of other geochemical modeling packages, follow the links on the Geochemical Modeling Software page.







			The Geochemist's Workbench® The Geochemist's Workbench® is a set of software tools for manipulating chemical reactions, calculating stability diagrams and the equilibrium states of natural waters, tracing reaction processes, modeling reactive transport, and plotting the results of these calculations. The package is designed for solving problems in aqueous geochemistry, including those encountered in environmental protection and remediation, the petroleum industry, and economic geology. For pricing, to order a copy of the GWB, or for information beyond that found below, contact RockWare. The workbench, designed for IBM-compatible personal computers running MS Windows, is available in three release levels. GWB Essentials consists of five of the most used and useful modules: Rxn balances chemical reactions and calculates equilibrium constants, temperatures, and equations. Act2 generates stability diagrams on activity, Eh, pe, pH, and fugacity axes. Tact generates temperature-activity and temperature-fugacity diagrams. SpecE8 computes the distribution of species, sorption onto surfaces, mineral saturation, and gas fugacity in aqueous solutions. Aqplot projects SpecE8 calculations in a variety of ways, including ternary, Piper, Stiff, Durov, Schoeller, and ion balance diagrams. The GWB Standard release includes the above modules plus two programs that add the ability to model reaction processes: React traces reaction paths involving fluids, minerals, and gases. React can account for kinetic rate laws, isotope fractionation, microbial metabolism and growth, and much more. Gtplot displays the results of React simulations. GWB Professional adds the "Xt" programs, which provide for reactive transport modeling: X1t models reactive transport in groundwater flows in one dimension, in linear and radial coordinates. X2t simulates reactive transport in two dimensions, including the effects of injecting and producing wells. Xtplot renders the results of X1t and X2t simulations as x-y graphs, color maps, and contour plots. Each program features a convenient point-and-click interface. For more details on the programs' capabilities, you can consult the GWB User's Guides: GWB Essentials Guide GWB Reaction Modeling Guide GWB Reactive Transport Modeling Guide GWB Reference Manual The "Geochemical Reaction Modeling" text, available from Oxford University Press and from RockWare costs about $50 US and contains a large number of fully-worked examples and applications. A variety of thermodynamic datasets formatted to be read by the GWB programs are available for downloading. Datasets in the GWB format for modeling radionuclide migration are available from the Waste Isolation Research Division of the Japan Nuclear Cycle Development Insititute (JNC). The Chess website has additional information about thermodynamic databases from various sources. For a list of frequently-asked questions about the GWB package (and the corresponding answers, of course) see the GWB FAQ page. You can join gwb_users, an independent group of users who share comments and results and answer questions of general interest. To subscribe (there is no cost), unsubscribe, or post a message, visit the GWB Users' Group home page. For information about a variety of other geochemical modeling packages, follow the links on the Geochemical Modeling Software page.

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