Drain

Hi,

I want to simulate a drain which collects water from the aquifer if the water table is lower and calculate the volume which can be exported out of the model by the drain

What kind of condition I can apply in the drain ?

Laurent,
you can use the 1st Dirichlet boundary condition as seepage node. Basically you have to check that the max. constraint value is null for each BC so that you have seepage nodes and not constante heads.
Good luck

Loic