SOLA-VOF was used to compute the undular bore evolution shown in Fig. 8. The initial configuration in Fig. 8a consists of a uniform mesh of 20 cells in the horizontal direction (6x = 0.6) and 8 cells in the vertical direction (6y = 0.2). Fluid initially fills the lowest five rows (depth 1.0) and is uniformly moving to the right with unit velocity. The right, bottom, and top walls are rigid, free-slip boundaries. At the left boundary, fluid is continuously input to prevent any waves from being generated there. Gravity acts downward with unit magnitude.