Fig. 3. Plots of the electric field E_x maxima vs. q/K_S. Results are for a depth of 10 cm, and for constant Gardner soil parameters equal to 4, 8, 12, or 16 m^–1 (top), and constant background effective water saturation S_e0 equal to 0.6, 0.7, or 0.8 (bottom). Note that the maxima increase with increasing q/K_S and , and decrease with increasing S_e0.)