Limiting cases of water fluxes at the land surface

Abstract

The processes of water flow in unsaturated zones are highly nonlinear and subject to either atmosphere control or soil control, often switching from one to the other. Such complicated processes are explored in this paper by examining some limiting analytical solutions of the Richards' equation. This leads to the proposal for future research of a hybrid scheme for solving the Richards' equation. The treatment of spatial variability is also briefly discussed. © 1994.