sentences:  Although the calculations are done numerically and have to be repeated many times, the final results can be "checked by hand" using the formulas in the manual.SaltMod's objective is to predict the long-term hydro-salinity in terms of general trends, not to arrive at exact predictions of how, for example, the situation would be on the first of April in ten years from now.Further, SaltMod gives the option of the re-use of drainage and well water (e.g.