FIG. 3. . Time series of tile outflow comparing data and model results for a two-dimensional single-porosity model (2D-SPM) and two-dimensional dual-permeability model (2D–DPERM). Drain discharge rates (lines) as well as daily rainfall and plot scale irrigation rates (blue columns at the top) are shown (a) for the total experimental period, and in greater detail (b) for the first and (c) for the second drainage period including the irrigation (Days 97 and 98) and a larger rainfall event (Day 100); rates for (c) are on a 12-h basis.