Fig. 6. Relative soil water content where the soil liquid- and gaseous-phase tortuosities become the same. Solute and gas diffusion data from Olesen et al. (1999) and Moldrup et al. (2000b) used to obtain the observed values (symbols) for L1, L3, and L5 soils. Model prediction (solid line) from Eq. [10] combined with Eq. [3] and [5]