Two-Region model for solute transport through heterogeneous soils and calculation of the analytical solution

A two-region model for 1-D solute transport through heterogeneous soils considering scale-dependent dispersion is studied, and an analytical solution describing the concentration distribution in the mobile region and immobile region is deduced under the initial concentration zero and a constant flux boundary condition of a semi-infinite 1-D space.The numerical computation is completed by the Mathematica software package.