FIG. 4. Adapted from Western et al. (1999), soil moisture in the 10-ha Tarrawarra watershed in Australia when dry (left) and wet (right). Each pixel is one time domain reflectometry point measurement to 30 cm depth. The 75th (left) and 90th (right) percentile indicator plots are shown under each respective figure. During dry periods, the pattern is random, but an organized patter emerges as the soil becomes wet.