I am working on my multi layer model in MODFLOW-USG.
In the middle of the model I have a big river. For that river I have defined river bed and head stage as TINs.
I am trying to Map it in MODFLOW-USG as polygon but there are too many errors (although conceptual model looks fine).
Most common errors are "Stage elevation is below river bed" and "River stage is below cell bottom elevation".
A few time I succeed to start MODFLOW but the heads were too high and low (-2e-17 to 2e+12).
Also there are many dry cells close to the river.