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1. Downsizer—A Graphical User Interface-Based Application for Browsing, Acquiring, and Formatting Time-Series Data for Hydrologic Modeling [USGS_Downsizer]
The U.S. Geological Survey Downsizer is a computer application that selects, downloads, verifies, and formats station-based time-series data for environmental-resource models, particularly the Precipitation-Runoff ...

2. PhreeqcI - A Graphical User Interface for the Geochemical Computer Program PHREEQC [USGS_PhreeqcI]   PARENT SERF
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 ...

3. A Computer Program for Speciation, Batch-Reaction, One-Dimensional Transport, and Inverse Geochemical Calculations [USGS_PHREEQC]   CHILD SERFs
PHREEQC- A Computer Program for Speciation, Batch-Reaction, One-Dimensional Transport, and Inverse Geochemical Calculations is written in the C programming language that is designed to perform a wide ...

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