Click on image to view larger version.
FIG. 1. Conceptual physical nonequilibrium models for water flow and solute transport. In the plots, 
is the water content, mo and im in (b) and (c) are water contents of the mobile and immobile flow regions, respectively; M and F in (d) are water contents of the matrix and macropore (fracture) regions, respectively, and M,mo, M,im, and F in (e) are water contents of the mobile and immobile flow regions of the matrix domain, and in the macropore (fracture) domain, respectively; c are concentrations of corresponding regions, with subscripts having the same meaning as for water contents, while S is the total solute content of the liquid phase.
