Gianmarco Dio Egr. ing.

Thank you zebra for your useful advices.
Gianmarco

Hallo Feflow users !
I have a very important question for you. I have modelled in 3D the time -  varying surface and ground - water flow in an italian basin. I have set the recharge as daily net rainfall directly applied as flow on top slice of my model.
Now I want to develop a mass transport model derived from the flow one. But even if I know the daily contaminant concentration associated to the net rainfall (or the mass daily infiltration per square meter), I can't find the way to easily apply it to my transport model. The In - Out flow on top button give us the possility to apply a known water infiltration rate directly on the ground surface. On the contrary a Source of mass on the surface must be expressed as g/day related to the unit volume of the first layer (if I have understood the feflow manual) and this is not so easy to calculate.
Do you have some suggestions?
Thank you very much
Gianmarco