Animation 4: Evolution of the aperture distribution (mean and individual realisations) in a setting with low initial degree of heterogeneity (&sigma0/&mu0 = 0.2) and a maximum recharge of Qmax = 10-4 m3s-1. Unlike the other animations with 10 logarithmic equidistant bins per order of magnitude, aperture-size frequency distributions shown here correspond to linear equidistant bins of 10 cm width. The evolution of the total inflow Qin &le Qmax is illustrated for all realisations in the inset. Thereby, strong increases of Qin approximately indicate breakthrough times.