Effects of soil heterogeneity on steady state soil water pressure head under a surface line source

There are numerous analytical solutions available for flow in unsaturated homogeneous porous media. In this paper, the stream tube model for one‐dimensional water movement is extended to two‐dimensional (2‐D) water movement from a line source as the stream plane model. As well, new solutions are derived to predict the mean and variance of pressure head of water movement under a surface line source in heterogeneous soil using the perturbation …