Problems involving capillary barriers along sloping, layered unsaturated soils were first addressed by Zaslav-This study presents a systematic approach to analyze the flow sky and Sinai (1981a, 1981b). In the last few decades, diversion and flow focusing caused by the natural flow-barrier system several quantitative analyses of lateral water flow in in the unsaturated zone (UZ) of Yucca Mountain, Nevada, under amlayered porous media have been presented (Miyazaki, bient steady-state flow conditions. An existing analytical solution for analyzing capillary barrier in porous media has been extended to apply