Activate the following packages in the "Model|MODFLOW Packages and Programs" dialog box.
STO, WEL, OBS, GWE, ADV, CND, EST, and SSM.
Screen capture of the MODFLOW Packages and Programs dialog box showing the selected packages
To better match the example model that comes with MODFLOW 6, make the following changes.
In the ADV package, select TVD.
In the EST package, set the Heat capacity of water to 4180 and the Latent heat of vaporization to 2500.
In the Flow package IMS solver, override the following values.
Tab |
Option |
New Value |
Non Linear |
Outer DV Close |
1E-7 |
Non Linear |
Outer maximum iterations |
200 |
Non Linear |
Under-relaxation scheme |
DBD |
Linear |
Inner maximum iterations |
300 |
Linear |
Inner DV Close |
1E-8 |
Linear |
Inner DV Close |
0.001 |
Linear |
Linear acceleration |
BICGSTAB |
In the GWE IMS solver, override the following values.
Tab |
Option |
New Value |
Basic |
Pseudo-transient continuation |
Don't use PTC for any stress period |
Non Linear |
Outer DV Close |
1E-7 |
Non Linear |
Outer maximum iterations |
200 |
Non Linear |
Under-relaxation scheme |
DBD |
Non Linear |
under-relaxation theta |
0.7 |
Non Linear |
under-relaxation kappa |
0.08 |
Non Linear |
under-relaxation gamma |
0.05 |
Non Linear |
Under relaxation momentum |
0.001 |
Non Linear |
Backtracking number |
20 |
Non Linear |
Backtracking tolerance |
2 |
Non Linear |
Backtracking reduction factor |
0.2 |
Non Linear |
Backtracking residual limit |
0.0005 |
Linear |
Inner maximum iterations |
300 |
Linear |
Inner DV Close |
1E-8 |
Linear |
Inner DV Close |
1E-9 |
Linear |
Linear acceleration |
BICGSTAB |
Click OK when you have made all these changes. A warning message will tell you that you need to define at least one transient stress period for the Storage package to be used. Click OK to dismiss the warning.
