I did a 3D transient model with 9 layers. I placed seepage face on slice 8 and 1D discrete feature through layer 1 to 7 (the bottom of the discrete features are the seepage faces) to simulate dewatering wells. When I set the maximum time step size to 20 days, the results look reasonable. You can see a drawdown cone developed in three months from layer 1 to 7. But when I reduced the maximum time step size to 1 day, the drawdown cone is very different- you cannot see a drawdown cone except on slice 8. What is the reason for this?
Any help is appreciated.
Quinn
