Wetted-perimeter dependent furrow infiltration and its implication for the hydraulic analysis of furrow irrigation systems

摘要

This article discusses a methodology, derived from the two-dimensional Richards equation, for estimating furrow infiltration. The method was originally derived assuming a constant pressure head at the infiltrating surface. Application of the methodology to cases where the pressure head is variable with time is examined. The procedure was programmed into the WinSRFR surface irrigation software. Initial results show that the method provides a reasonably accurate reproduction of infiltration predicted with the two-dimensional Richards equation.