Many thanks for the prompt response. It is encouraging to know that you linked phreeqC with a fortran solute transport model, and the computational efficiency was good. Some of the possibilities I can think are (1) link the fortran solute model to Phreeqc through a DLL, (2) write results of phreeqC, and the fate and transport model at each iteration/time step to a disk and read (for each module) -- this could slow things if we simulate a large 3D problem for a lengthy duration!. Did you use a different approach? There are a few software that can convert a C program into a Fortan but it is a little risky with complex programs. I very much appreciate your help in this matter. Ashok 540-953-1555 ----- Original Message ----- From: "David L Parkhurst" <dlpark@xxxxxxxx> To: "Ashok Katyal" <ashok@xxxxxxxxxx> Sent: Wednesday, October 08, 2003 2:45 PM Subject: Re: Phreeqe > > 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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