USGS: Science for a changing world

Reaction-Transport Modeling in Groundwater and Watershed Systems

David Parkhurst, Scott Charlton, Alan Riggs, and Richard Webb


Project Description




A Computer Program for Speciation, Batch-Reaction, One-Dimensional Transport, and Inverse Geochemical Calculations

Bullet PhreeqcI

A Graphical User Interface for the Geochemical Computer Program PHREEQC (PC only)

Bullet PHAST

A 3D Reaction-Transport Model based on PHREEQC and HST3D


An Interactive Code For Modeling Net Geochemical Reactions Along a Flow Path


The Water, Energy, and Biogeochemical MODel

Obsolete software


PHREEQC Version 1.6

PHREEQE Version 2.4


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Complete Water Resources Division Software
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