Fig. 7. Data and model results using the mobile–immobile model (MIM), the convection dispersion model without (CDM-forward) and with (CDM-inverse) inverse parameter estimation: (a) drain discharge rates, (b) cumulative drain discharge, (c) Br^– concentration of the drain effluent during the entire experimental duration, and (d) from 97 to 99 d, as simulated with the MIM for the mobile region (MIM, mobile), immobile region (MIM, immobile), and for the mobile region when only the first Br^– application [MIM, mobile (first application)] was considered.