FIG. 1. Steady-state water retention curves measured in 1 g for porous ceramic aggregates (a) Profile (0.25–1 mm), (b) Mix (0.25–2 mm), and (c) Turface (1–2 mm). Solid lines represent the van Genuchten water retention model (Eq. [2]) fitted to six replicate measurements of drainage (•) and wetting () for processes within interaggregate pores. Dashed and dotted lines indicate the 95% confidence interval for the fitted retention curves.