Well, I suggest you to check the water velocity to see if the time scale
that you are using in the transport simulation is compatible with it. It
could be just a matter of extending the simulation time. Other possibility
is that if you are applying a very high adsorption coeff., causing a further
reduction of the effective velocity of the plume.

Regards,
Stela Cota


2008/9/8, rory_valerias <A.Oord@...>:
>
> Hello,
>
> I'm trying to run a Visual Modflow model in RT3Dv2.5 using
> Instanteneous aerobic decay of BTEXN. I've put in a constant
> concentration for BTEXN and oxygen in one layer. I've tried several
> solvers and it gives no problems during calculation. However, I never
> get a concentration value in my output. Can anyone help me with this
> problem?
>
> Regards,
>
> Arjen Oord/Cedrick Gijsbertsen