Fig. 11. (a) Variation of coefficient n of Eq. [21] for the 10- and 60-cm wetting depths and an initial pressure head of –1500 kPa; (b) Variation of coefficient n of Eq. [21] for the 30- and 100-cm wetting depths and an initial pressure head of –1500 kPa; and (c) Variation of coefficient C of Eq. [21] for four initial depths and an initial pressure head of –1500 kPa.