Modification in permaFoam of the capillary capacity parameterization of the water flow equation for matching the pressure-formulation of Richards equation proposed in Kavetski et al., 2001 (Kavetski D., Binning P., Sloan S.W., 2001. Adaptive time stepping and error control in a mass conservative numerical solution of the mixed form of Richards equation. Advances in Water Resources 24 : 595-605).