PHT3D is a multicomponent transport model for three-dimensional reactive transport in saturated porous media. It is currently being further developed and maintained by Henning Prommer at CSIRO Land and Water Australia. The code is based on previous work carried out at Delft University of Technology, the University of Tübingen (Center for Applied Geoscience), the Contaminated Land Assessment and Remediation Research Centre (University of Edinburgh), the University of Western Australia and the Centre for Groundwater Studies Australia.
The most recent version of the code (v1.46) incorporates MT3DMS (5.1) for the simulation of three-dimensional advective-dispersive multi-component transport and the geochemical model PHREEQC-2 (v2.9) for the quantification of reactive processes. PHT3D uses PHREEQC-2 database files to define equilibrium and kinetic (e.g., biodegradation) reactions.
MT3DMS is based on MT3D, originally developed by Chunmiao Zheng at S.S. Papadopulos & Associates, Inc. and documented for the United States Environmental Protection Agency. MT3DMS is written by Chunmiao Zheng and P. Patrick Wang with the iterative solver routine by Tsun-Zee Mai. Funding for MT3DMS development was provided, in part, by U.S. Army Corps of Engineers Waterways Experiment Station.
PHREEQC-2 was developed by D.L. Parkhurst and C.A.J. Appelo. It is based on former versions of PHREEQC/PHREEQE by D.L. Parkhurst.
As the public-domain codes PHREEQC-2 and MT3DMS form the core of the coupled model, the underlying work of D.L. Parkhurst, C.A.J. Appelo, C. Zheng and their co-workers is greatly acknowledged.
PHT3D has been incorporated into the PMWIN pre/postprocessing package and is now (August 2006) also available under Visual Modflow (> v4.1).
PHT3D has been tested for
benchmark problems
from the literature and applied successfully for a
wide range of biogeochemical transport
modelling studies . Executables of the code are available for Win98/Win XP
and Linux 
.
For further information, contact Henning.Prommer@csiro.au
(last modified 08/08/2006)