Hello everyone...

I am doing groundwater flow and contaminant transport modeling for saturated
region with transient conditions. I am doing it for 1.0xE4 years. while doing
that i am facing two problems

1.Head values at some of the observation wells are oscillating 10-15 metres

2.Time step is not going beyond 200 days so it is taking so much time for
running. I am using automatic predictor corrector method.

i would like you all to give your suggestions so that i can resolve thee
problems.

Thanks.

Regards,

Manish Chopra