Advances in Unsaturated Soil, Seepage, and Environmental Geotechnics represents the latest advances in applied unsaturated soil mechanics, and coupled phenomena in geotechnical engineering practice. This Geotechnical Special Publication contains 42 papers that were presented at the GeoShanghai Conference held in Shanghai, China from June 6-8, 2006. The book begins with two state-of-the-art papers on geoenvironmental engineering and unsaturated soil mechanics applied to field problems. It then continues by highlighting papers on unsaturated soil phenomena, coupled phenomena and transport phenomena. The book showcases new experimental evidence and theoretical developments on strength and deformational behaviors of both expansive soil and collapsible loess, as well as some new testing techniques to characterize volumetric change and strength of these problematic soils. It reports on the latest understanding of various coupled phenomena in soils such as hydro-biological, hydro-mechanical, hydro-thermal, thermal-mechanical and hydro-chemical coupling. The papers also address the latest advances in geoenvironmental applications including the sustainability of landfills, removal of various contaminants from soils, soil-contaminant interactions and soil stabilization.