Preferential flow in hillslope systems through subsurface networks developed from a range
of botanical, faunal and geophysical processes have been observed and inferred for
decades and may provide a large component of the bulk transport of water and solutes.
However, our dominant paradigm for understanding and modelling hillslope hydrologic
processes is still based on the Darcy–Richards matric flow framework, now with a set of
additional methods to attempt to reproduce some of the aggregate function of the two‐phase …