FIG. 2. . Schematic picture of the two-dimensional (2D) vertical cross-section used in the simulations. Top: 2D single-porosity model simulation results for the pressure head distribution at Day 98.0 (i.e., between the two irrigation events). The colors represent soil matrix potentials, with pink indicating full saturation, and the arrows symbolize flow velocity vectors (colors representing Darcian flux in cm d^–1) that are mostly small except in the vicinity of the drainpipe (the latter is indicated by a circle). Bottom: Finite element numerical grid.