Fabrice:

You may want to consider using the Analytic Element Method since it can
directly simulate this type of scenario. Haitjema (1995) provides a
discussion of this type of problem.

Best wishes,

Mark M Wilsnack

Mark M. Wilsnack, P.E.
Principal Engineer
Stream Gauging & Hydraulic Engineering Support
Operations & Hydro Data Management Division



________________________________

From: hydrologymodel@...
[mailto:hydrologymodel@...] On Behalf Of fabrice.compere
Sent: Wednesday, August 06, 2008 5:39 AM
To: hydrologymodel@...
Subject: [hydrologymodel] Help to modelize an unconfined then becoming
confined aquif

Hi to the members of this group.
That's my first post ever here !

I'm performing a preliminary research concerning the possibility to
modelize a chalk aquifer unconfined in its west part, then becoming
confined in its East part.

At this day, I have not found any serious reference describing such a
problem. Obviously, I would tend to a simplistic (?) approach
involving strong contrast in storage coefficient between the two
areas.

How to treat this type of configuration with ModFLow ?
Does anybody knows a reference (article, book,...) dealing with this
problem ?

Thanks a lot to answer.

Best regards

Fabrice