Fig. 6. Temporal change in the evaporation rate for (a) Masa loamy sand and NaCl (b) Masa loamy sand and KCl, and (c) Toyoura sand and NaCl. In (a), numerical solutions are for Column 3; rsc is the resistivity of the salt crust; half and quarter dispersivity is in reference to the dispersivity in the top 2 cm compared with the independently measured value.