Far Field Boundary Conditions in SEEP/W
I am performing a seepage analysis of an embankment dam and have a question about the downstream boundary condition. I am using a potential seepage face boundary condition since tailwater is unknown. Is it appropriate to extend the potential seepage face down the right side of the model as a far field boundary condition or only apply it to the ground surface?
Thank you!
Comments
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Hey!
Thank you so much for getting in touch with us
In many groundwater flow problems, the exact location of the seepage face is unknown. The potential seepage face review option allows SEEP/W to determine the extents of the seepage face. As you know this type of boundary condition can be specified as shown, using a water rate boundary condition with the flow rate set to 0 and the potential seepage face review toggled on.
In this case it is appropiate only to the ground surface. If there is a known far field ground water level, that would be applied as a total head on the vertical downstream portion of the domain (but it should be far enough away that it isn’t significantly influencing the results)
If you have any further questions, don't hesitate in contact us!
Kind regards
Ignacio
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