This model solves a 1-D transport problem, representative of a column experiment. The compound is subject to advection, dispersion and reaction. The normed concentration distribution is given by:
$$\frac{C(x,t)}{C_0} = \frac{1}{2} \Big\{ \mathrm{exp} \Big( \frac{- \lambda x}{v} \Big) \mathrm{erfc} \Big( \frac{x - vt ( 1 + H )}{2 \sqrt{Dt}} \Big) \Big\}$$