Deep Drainage

The vertical drainage across the lower boundary of a soil profile is sometimes approximated by a flux which depends on the position of the groundwater table [Hopmans and Stricker, 1989]. If available, such a relationship can be implemented in the form of a variable flux boundary condition. The discharge rate Q(n) assigned to node n is determined in the program as Q(n) = Witdh(n) * A * exp(B|h-GWL0L|), where A and B are empirical parameters and GWL0L represents the reference position of the groundwater table.

See also the "How to Edit Boundary Conditions" topic.

See available Water Flow Boundary Conditions.