> In selected output-file of version 2.2 (upward) alkalinities are always zero You need to use the identifier -alkalinity in SELECTED_OUTPUT to print the alkalinity to the selected-output file. Including Alkalinity in the list for -totals does not work for alkalinity. > (see excel-sheets) and pH-values are only realistic for cell 1 and cell 2. Both versions appear to be consistent in calculating a pH of 10. I believe the program is making the proper calculation for the conditions that you have specified. You need to look at the changes in the distribution of species for the surface complexes to see what is causing the high pH values. It is probably related to the selection of log K values for the surface complexes and the initial conditions. David David Parkhurst (dlpark@xxxxxxxx) U.S. Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225
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