Fig. 2 Soil water pressure head (h_w) vs. time at a depth of 10 mm for all applied fluxes with air-dry initial soil water content in (a) F-14 sand; (b) 60–80 sand separate; (c) 80–100 sand separate; (d) 100–140 sand separate; and (e) F-95 sand. Fig. 2 (f) is a comparison of measured h_w vs. time for all of the samples under applied fluxes of q* = 0.20