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Analysis of Influence by soil water-characteristic curve and permeability-suction relationship for the water flow in unsaturated soil  

Kim, Suk-Nam (한국토지공사 토지연구원)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.3, no.2, 2003 , pp. 119-125 More about this Journal
Abstract
Water flow in unsaturated soils is affected by two mathematical equations called soil water-characteristic curve and permeability-suction relationship. Soil water-characteristic curve is an equation showing volumetric water content-suction relationship. Many researchers have presented equations for the relationships. This paper illustrates the importance of correctly determining the two relationships when analyzing unsaturated water flows. Results from two methods, Gardner (1958) and Fredlund et al. (1994), are used for comparison purposes. Numerical simulations of water flow by finite element method are performed using the two methods. The results by the numerical simulations are compared with the field data which was obtained from time-domain reflectometry (TDR) probes in Delaware County, Ohio. This data was obtained by the Seasonal Instrumentation Program which is included as a part of the Strategic Highway Research Program (SHRP).
Keywords
soil water-characteristic curve; permeability-suction relationship; unsaturated soil; finite element method; seasonal instrumentation;
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  • Reference
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