Evaluation of hysteresis of soil water retention curve by a semi-physical model

L. Qiang, Noriyuki Yasufuku, K. Taizou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The modified Kovács (MK) model is a predictive model, which is based on basic geotechnical properties and can be used to obtain soil water retention curves. It has the capability to reflect the hysteresis effect of the soil water retention curves. Many items were believed or supposed to be the causes of hysteresis of soil water retention curves. The contact angle at the interface between the pore-water menisci and the solid soil particles was considered as the main and only quantitative source of hysteresis effect of soil water retention curves in the MK model. In this paper, integrating wetting angle into the MK model was firstly proposed. Secondly, a series of experimental study of soil water retention with hysteresis consideration was undertaken to verify the MK model with considering hysteresis effect. Then nonlinear program code, based on the MK model, was set up to give out the best fitting curves for experimental results. The simulated results show relatively good agreement with the drying curves and primary wetting curves. Finally some arbitrary value of contact angle within suitable range was chosen to show the effect on the characteristic of soil water retention curves and the capability, and limitation of this model were discussed.

Original languageEnglish
Title of host publication14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering
Publication statusPublished - 2011
Event14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011 - Hong Kong, China
Duration: May 23 2011May 27 2011

Other

Other14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011
CountryChina
CityHong Kong
Period5/23/115/27/11

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All Science Journal Classification (ASJC) codes

  • Soil Science
  • Geotechnical Engineering and Engineering Geology

Cite this

Qiang, L., Yasufuku, N., & Taizou, K. (2011). Evaluation of hysteresis of soil water retention curve by a semi-physical model. In 14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering