Means and method for hydraulically isolating unsaturated zones in soil

摘要

A method and apparatus for hydraulically isolating a volume in porous unsaturated material, such as soil. Air is forced through a permeable layer of material adjacent to the volume to be hydraulically isolated. The air flow through the permeable layer creates a water potential gradient. This causes water to migrate from more saturated areas which in turn would allow hydraulic isolation of any unsaturated area.