Fig. 11 Numerically simulated breakthrough curves (BTCs, thick lines) as a function of the solute penetration depth, 
, in the sandy loam for Infiltration Regime 2 and for the case of a flow rate dependent dispersivity together with predictions by the approximate steady-state flow model Eq. [17] (dashed line) and the steady-state flow model using 
eff(z) (thin line): (a) 
= 0.3 Jw (Case 6) and (b)
(Case 7). Labels on the BTCs refer to the observation depth; labels in parentheses refer to eff
(both in cm)
