Modeling the influence of MgSO4 invariant points on multiphase reactive transport process during saline soil evaporation

► Modeling evaporation of sand column with MgSO4 solution. ► Model involves oven dry conditions, high salinity, hydrated mineral precipitation. ► Coupling effects: geochemical reactions on water content and therefore on flow. ► Modeling invariant points: mineral paragenesis prescribes water activity. ► Invariant points affects evaporation, vapor flux, salt distribution.