You can download from this page datasets of chemical properties that can be read directly into the GWB applications. Each dataset is in text format and can be viewed with TEdit, or an editor such as Notepad.
The table below points to datasets distributed with the GWB software. The current format is compatible with GWB10 and later. The older formats, while less flexible, work with all supported releases. Datasets may be available from other sources, as cited at the bottom of this page.
|The LLNL thermo database. This is the default dataset of thermodynamic data for the GWB applications, including log Ks for hundreds of reactions involving aqueous species, minerals, and gases; also coefficients for evaluating activity coefficients by the B-dot equation.||thermo.tdat|
|An expanded variant of the LLNL database containing many organic species and radionuclides. Some people feel this database is less internally consistent than thermo.tdat, especially with respect to aluminum and sulfur species.||thermo.com.V8.R6+.tdat|
|The thermodynamic dataset from the USGS's PhreeqC program, formatted for the GWB applications.||thermo_phreeqc.tdat|
|Visual Minteq's thermodynamic database, formatted for the GWB courtesy of Jon Petter Gustafsson. Updated versions of the database may be available from his website.||thermo_minteq.tdat|
|Thermo data from the USGS's Wateq4F software.||thermo_wateq4f.tdat|
|Log Ks and virial coefficients for evaluating the Harvie-Møller-Weare activity model (a formalism of the "Pitzer equations")||thermo_hmw.tdat|
|The Yucca Mountain Project dataset, invoking the Harvie-Møller-Weare activity formalism of the "Pitzer equations"||thermo_ymp.R2.tdat|
|The Harvie-Møller-Weare activity model, as implemented in the USGS program PHRQPITZ. The dataset includes borate species and some provision for temperature dependence.||thermo_phrqpitz.tdat|
|Surface complexation (two-layer) model of ion sorption to hydrous ferric oxide, from Dzombak and Morel. The latter of the two datasets includes some binding coefficents estimated by correlation.||FeOH.sdat, FeOH+.sdat|
|The Dzombak and Morel model, as implemented in Visual Minteq.||FeOH_minteq.sdat|
|Coefficients for calculating electrical conductivity by the USGS method: McCleskey et al., GCA v. 77, p. 369–382, 2012.||conductivity-USGS.dat|
|Coefficients for calculating electrical conductivity by the APHA method, from Standard Methods.||conductivity-APHA.dat|
|Isotope fractionation factors for 2-H, 18-O, 13-C, 34-S as functions of temperature.||isotope.dat|
|Drinking water quality regulations from the US EPA's website.||WaterQualityRegs.dat|