Fig. 1. Schematic illustration of reduction functions of (a) Maas and Hoffman; (b) Feddes et al.; (c) direct application of 
(ho) = 0.8 into no stress part of Feddes et al.; and (d) combined reductions of h and ho.
Fig. 1. Schematic illustration of reduction functions of (a) Maas and Hoffman; (b) Feddes et al.; (c) direct application of (ho) = 0.8 into no stress part of Feddes et al.; and (d) combined reductions of h and ho.