What is it?
Molecular diffusion is a property of the solute in the porous medium.Source: Freeze, R. A., & Cherry, J. A.. 1979. Groundwater. Englewood Cliffs, New Jersey: Prentice-Hall, Inc.
How to use it:
Check the radio box next to ‘Molecular Diffusion L’ and/or ‘Molecular Diffusion T’ and input non-zero molecular diffusion coefficients to include lateral (L) and transverse (T) molecular diffusion in the solute transport simulations.Solute source concentrations and extents can be added using zones and the Sources and Sinks tabs in the Zone Attributes menu.