Representing freshwater recharge into a saline aquifer

Hi,

Does anyone know the best way of representing time-variant recharge of fresh-water (0 mg/l) into an aquifer that is originally brackish to saline ( up to 5000 mg/l)?  Is it best to use injection wells to supply the recharge?  The recharge occurs as individual high recharge events, between which there is zero recharge.  If I use injection wells then how do I specify that the concentration of the water going in is 0 mg/l, rather than saline? 

Cheers,

Gemma ???

Gemma,

If you introduce recharge to your modell it is allways freshwater (0 mg/l). This would be the same for injection wells. I would not use injection wells because your modell may become confusing.

There are several ways to define time dependent recharge. You could look up the discussion about "aquifer recharge" in this forum.

zebra