Selected effects of field variability on predictions from a soil water finite difference model.

Abstract

Known field variability of soil hydrologic parameters is incorporated into a general finite difference scheme for the prediction of near surface soil water conditions, including runoff. It is shown for the situations examined that the resolution of predictions obtained is relatively robust against 'within soil group' changes in the soil water retention characteristics, but that a significant deterioration in resolution occurs when all input parameters are subjected to stochastic sampling from specified distributions.-from Author