Fig. 11. Mass fraction of brilliant sulfaflavine and sulforhodamine B on a horizontal core cross section plotted vs. the minimal fraction of the total area in which the mass fraction is contained. Smooth lines are mass fraction vs. area fraction plots that are derived from concentration maps on core cross sections (55–15 mm above the bottom of the soil cores, with gray values decreasing with height of the cross section). Discontinuous lines are mass fraction vs. area fraction plots at 45 mm above the bottom of the soil core predicted by the physical nonequilibrium model (PNEM). Full lines are PNEM predictions for the large _m parameter set and dashed lines for the small _m parameter set (see text and Table 4).