Influence of unsaturated soil properties uncertainty on moisture flow modeling

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Abstract

The quality of numerical modeling solution of moisture flow through unsaturated soil, in part, depends on properly described unsaturated soil properties. The variability of Soil Water Characteristic Curve, SWCC, is attributed to hysteresis and difficulties associated with its measurement. The variability of unsaturated soil permeability is contributed to the uncertainty associated with the estimation of this parameter with currently available fit functions, hence a range of reasonable variation was considered. One-dimensional analysis of expansive soil under dry initial conditions (-1500 kPa) was performed; both potential evaporation and infiltration boundary conditions were considered. It was found that small variations in unsaturated soil permeability function result in significantly different modeling outputs while variation in SWCC produced almost identical soil response in terms of soil suction.

Original languageEnglish (US)
Title of host publication12th International Conference on Computer Methods and Advances in Geomechanics 2008
Pages2521-2528
Number of pages8
StatePublished - Dec 1 2008
Event12th International Conference on Computer Methods and Advances in Geomechanics 2008 - Goa, India
Duration: Oct 1 2008Oct 6 2008

Publication series

Name12th International Conference on Computer Methods and Advances in Geomechanics 2008
Volume4

Other

Other12th International Conference on Computer Methods and Advances in Geomechanics 2008
CountryIndia
CityGoa
Period10/1/0810/6/08

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Keywords

  • Hysteresis
  • Modeling
  • Uncertainty
  • Unsaturated

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Applied Mathematics

Cite this

Dye, H. B., Houston, S., & Welfert, B. (2008). Influence of unsaturated soil properties uncertainty on moisture flow modeling. In 12th International Conference on Computer Methods and Advances in Geomechanics 2008 (pp. 2521-2528). (12th International Conference on Computer Methods and Advances in Geomechanics 2008; Vol. 4).