Dear Reader,

this CD is distributed with the book "Groundwater Geochemistry: A Practical Guide to Modeling of Natural and Contaminated Aquatic Systems". It contains the following 4 folders:

* PhreeqC-Installation
To solve the exercises on hydrogeochemical modeling explained in the book (chapter 3), you have to install the program PhreeqC2 on your computer. The program was developed by the USGS (United States Geological Survey) and is public domain. You can download the most recent version at the USGS homepage: http://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqc/ 

The most recent windows user interface can be found at: http://www.geo.vu.nl/users/posv/phreeqc/index.html.

The folder PhreeqC-Installation contains installation files for Linux, MAC (OS 9 and OS X), Unix and Windows. A detailled installation description can be found in the respective readme files.

To use PhreeqC with the Windows user interface, only PHREEQC for Windows version 2.14.03 has to be installed. This however does not contain the programs source code. If you need the source code, you have to install the Windows version 2.15.0-2697 additionally. To solve the examples in the book, installing PhreeqC with Windows user interface is sufficient.

Additionally, the folder PhreeqC-Installation contains the installation file for PhreeqCI (phreeqci-2.14.3-2411.exe) and the complete PhreeqC manual as .pdf file. To read the file, you need the Acrobat Reader (Adobe). The program is public domain and can be downloaded at http://www.adobe.com/products/acrobat/readstep2.html. 

* PHAST installation
This folder contains the installation files for PHAST and WPHAST as well as the PHAST manual as .pdf file.

* PhreeqC_files-exercises-chapter3
This folder contains the PhreeqC input and output files of all exercises discussed in the book. Names of subfolders and files correspond to the sections of chapter 3 in the book:

1-1_Groundwater-Lithosphere (1_Standard output well analysis; 2_Equilibrium-gypsum-solubility; 3_Disequilibrium-gypsum-solubility; 4_Temp-gypsum-solubility-well-water; 5_Temp-gypsum-solubility-distilled-water; 6_Calcite-solubility; 7_Calcite-dolomite-solubility; 8_Closed-system and 8_Open-system; 9_Pyrite-weathering)

1-2_Atmosphere-Groundwater-Lithosphere (1_Precipitation-soil-CO2; 2_Precipitation-Al-Buffer (and Calcite, Fe, Mn, Exchange Buffer); 3_Sulfur-springs; 4_Formation-stalactites; 5_Evaporation)

1-3_Groundwater (1_pepH_Fe; 2a_pepH_Fe_C and 2b_pepH_Fe_S; 3_Uranium-species-pH-dependent)

1-4_Origin-of-Groundwaters (1_Fossil-groundwater; 2_Salt-water-fresh-water-interface) 

1-5_Anthropogenic-use-of-groundwater (1_Titration_EDTA; 2_Carbonic-acid-aggressiveness; 3_Aeration-well-water; 4_Aeration-sulfur-spring; 5_Mixing-of-waters)

1-6_Rehabilitation-of-groundwater (1_Reduction-nitrate-methanol; 2_Fe0-Barriers; 3_pH-increase-calcite (and dolomite, and magnesite); 

2_Reaction-kinetics (1_pyrite-weathering-heap; 2_quartz-feldspar-dissolution; 3_degradation-organic-matter_600days (and 10000 days); 4_Tritium (and real modeling))

3_Reactive-transport (1_Lysimeter; 2_Karst-spring-discharge; 3_Karstification; 4_pH-increase-acid-mine-water; 5_insitu-leaching; 6_3D-transport)

The folder "0_Introductory-Examples" contains the introductory examples described in chapter 2.


* Program_for_pe-pH-diagrams
Support for the solution of the exercises in section 3.1.3 "Groundwater" (pe-pH-diagrams) can be found in the folders "Excel_Basic_Makro" and "Visual_Basic_Prog_pe-pH". 

With the visual basic program you can copy a master PhreeqC input file, which contains the job for any pH-pe-value-combination, and change pe and pH stepwise. The program is started with the "ph_pe_diagramm.exe". Additional information can be found in the Help Menu. The Excel makro helps to determine the predominant species for all pe-pH-conditions from the output file. The makro is activated by opening "makro.xls. Confirm "activate makro", and copy your own data in table 1 instead of the test data. The makro itself can be found at Extras / Makro / Makros (name "maxwert"). 


Have fun modeling!
The authors
