Skip to main content
U.S. flag

An official website of the United States government

Hysteresis of unsaturated hydromechanical properties of a silty soil

January 1, 2014

Laboratory tests to examine hysteresis in the hydrologic and mechanical properties of partially saturated soils were conducted on six intact specimens collected from a landslide-prone area of Alameda County, California. The results reveal that the pore-size distribution parameter remains statistically unchanged between the wetting and drying paths; however, the wetting or drying state has a pronounced influence on the water-entry pressure, the water-filled porosity at zero suction, and the saturated hydraulic conductivity. The suction stress values obtained from the shear-strength tests under both natural moisture and resaturated conditions were mostly bounded by the suction stress characteristic curves (SSCCs) obtained from the hydrologic tests. This finding experimentally confirms that the soil-water retention curve, hydraulic conductivity function, and SSCC are intrinsically related.

Citation Information

Publication Year 2013
Title Hysteresis of unsaturated hydromechanical properties of a silty soil
DOI 10.1061/(ASCE)GT.1943-5606.0000786
Authors Ning Lu, Murat Kaya, Brian D. Collins, Jonathan W. Godt
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Geotechnical and Geoenvironmental Engineering
Index ID 70157088
Record Source USGS Publications Warehouse
USGS Organization Geology and Geophysics Science Center

Related Content