The Terrestrial Water Cycle: Modeling and Data Assimilation across Catchment Scales

∂ θ ψ ψ ψ ψ θ ψ ψ ψ ψ cos sin z K z y K y x K x t z l l with: • ψ = normalized pore pressure • Θ = water content •K l = hydrological conducibility in the xy plane •K z = vertical conducibility • θ = sliding slope Hydrological aspects: flow of water in the soil