Deep Percolation, Drainage and Water Quality

The purpose of this study is to illustrate and and qualitatively describe results of steady and transient numerical simulations examining the influence of drain spacing and depth on shallow groundwater flow paths and drain water quality. This paper outlines results of a preliminary investigation towards the complete analysis and considers steady recharge to the water table in a layered anisotropic soil. Results of this and subsequent transient analyses will then be used to propose conceptual modifications of traditional drainage system design in irrigated regions.