Fig. 3. Impact of the mass recovery fraction (MRF) on the relative difference in (A) pore water velocity (v) and (B) dispersion coefficient (D) estimated by the least-squares optimization (LSO) and the method of moments (MOM) approaches for 85 measured solute breakthrough curves. The subscripts indicate the estimation method (LSO or MOM) for the respective parameters. PFBA = pentafluorobenzoic acid.