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FIG. 8. Comparison of quasi-steady-state microgravity drainage and wetting water retention data with steady-state 1-g porous media water retention curves for Turface. In (a) measurements in a 2- cm-tall sample with water contents shown as average sample values determined from pumped volumes are shown. Matric potentials were measured at z = 0.5 and 1 cm. Measurements using a 4-cm-tall sample with water contents shown as TDR measurements are depicted in (b) and (c), where water contents were measured at z = 1 cm (bottom) and z = 3 cm (top), respectively. The solid lines are predicted 1-g retention curves (upper = drainage, lower = wetting). Dashed or dotted lines indicate the 95% confidence interval for the 1-g retention curves.
