GeoStudio Example Verification of Kisch Clay Liner Problem

This document is a technical report that presents an example of the verification of a clay liner problem using the SEEP/W software. The objective is to compare the computed steady-state water transfer solutions for fully unsaturated flow with a known solution, as established by Kisch in 1959. The report outlines the methodology used, including the setup of a one-dimensional model domain with a compacted clay layer over coarse sand. Two analyses are conducted: one with a zero pressure boundary condition and another with a unit gradient condition. The results demonstrate that the pore-water pressure profile computed by SEEP/W aligns with Kisch's semi-analytical solution, confirming the software's capability to simulate unsaturated flow problems. Additionally, the report discusses the implications of using unit gradient boundary conditions in scenarios where the water table's location is unknown or does not significantly affect the performance of the liner or soil cover system.