A Computation Method for Calculating Outflow Drainage From Initially-Saturated Stratified Soil PDF

Keywords

land drainage, agriculture, infiltration

Abstract

Land drainage is a common practice in agricultural areas where excess water is to be drained to maintain the necessary wetting state for healthy plant roots and to prevent rotting. This requires an understanding of the infiltration process. Several researchers have dealt with the situation analytically and numerically. Their methods of solution varied according to their representation of the physical process of water percolation through soil. In this paper, an attempt is made to demonstrate the capability of a numerical model to describe the stratified drainage process. The output from the numerical analysis is compared with the analytical solution utilizing the Green and Ampt approach. The comparison shows good agreement especially during the early-stage of drainage.