phreeqC is definitely the superior model relative to phreeqE. The types of chemistry include surface complexation, solid solutions, and general kinetics, which are not available with phreeqE. Input for phreeqC is much simpler. There are many other improvements and features that are present in phreeqC. We have linked phreeqC with a Fortran solute transport model and have not had any problems with computational inefficiency related to mixing the languages. David David Parkhurst (dlpark@xxxxxxxx) U.S. Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225 Project web page: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled "Ashok Katyal" <ashok@xxxxxxxxxx To: <dlpark@xxxxxxxx> > cc: Subject: Re: Phreeqe 10/08/2003 11:30 AM Dear Dr. Parkhurst: We are planning to link a variably saturated 3D flow, and fate and transport model with Phreeqe/Phreeqc that you have developed. After reading USGS website I found that "PHREEQE is now obsolete and has been replaced with the program PHREEQC". Our fate and transport model is in FORTRAN, and linking with PHREEQC (written in C) may not be computationally as efficient as linking with PHREEQE (fortran version) -- although creating a DLL may be an option worth investigation. We will appreciate any advise you may have for us in this matter. Many thanks. Ashok Katyal, Ph.D. Principal Enginner RASI Inc. 540-953-1555
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