Line-doublets

Line-doublets are used to simulate leaky and impermeable walls. The flux normal to an impermeable wall is zero. The flux through a leaky wall (the normal component \(q_{n}\)) is defined as

\[q_n = (h^- - h^+)/c\]

where \(h^-\) and \(h^-\) are the heads on the minus and plus sides of the wall, and \(c\) is the resistance against flow through the walll. An impermeable wall is equivalent to a leaky wall with a resistance that is equal to infinity.

1. LeakyWall is used to simulate one straight leaky wall

2. LeakyWallString is a leaky wall represented by a poly-line of straight segments