Here is netpath, it is an inverse model that will account for evaporation. NETPATH is a DOS program and runs in a DOS window under Windows. (See attached file: netp2-13.exe) You may want to consider PhreeqcI as well. PhreeqcI can make the same inverse modeling calculations as NETPATH, with the exception of isotopic fractionation, but the use of the INVERSE_MODELING data block. PhreeqcI allows for uncertainty in the chemical data and is a bit more forgiving in finding plausible inverse models. You must include H2O(g) as a phase in PHREEQC to account for evaporation. Example 17 in the users manual uses evaporation. PhreeqcI is a graphical user interface to PHREEQC that runs under all Windows operating systems, Win95 and up. Both NETPATH and PhreeqcI (and PHREEQC) can be obtained from the web site listed below. 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
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