Hi David, I recently completed the PHREEQC course with Geoff Thyne who recommended to contact you with this question. During my PhD years I developed inverse models using PHREEQC incl. uncertainty to assess salinization of an aquifer in the Murray-Darling Basin. My current focus, working with Jim Hendry, is developing reactive transport models with PHREEQC for centrifugation experiments on clay till, evaluating exchange coefficients & carbonate equilibria etc. PHREEQC is useful to scale these experiments of diffusive-advective transport at accelerated gravity to match solute diffusion profiles at field scale. A question which I can't find addressed in FAQ: Is it possible to identify exchangers and alkalinity for SELECTED_OUTPUT with USER_PUNCH ? It would be helpful to include exchanger composition and to perform unit conversions for alkalinity etc. regards, wendy -- W. Timms Postdoctoral Fellow (Aqueous Geochemistry), Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK., CANADA, S7N 5E2 ph. 306 966 5730 fx. 306 966 8593 www.wrl.unsw.edu.au/~wendy
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