Estimation of air permeability function from soil-water characteristic curve

Qian Zhai, Harianto Rahardjo, Alfrendo Satyanaga

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The multiphase flow (including liquid flow and air flow) in unsaturated soil is related to many engineering problems such as contaminant transport, rainwater infiltration, and soil-water evaporation. It is proven that water flow in unsaturated soil can be estimated using the concept of the pore-size distribution function. Many models have been proposed to estimate the water flow or water permeability function, kw, from the soil-water characteristic curve (SWCC). On the other hand, a limited model has been proposed to estimate the air flow or air permeability function, ka, from the SWCC. Most of the models used for the estimation of the air permeability functions are empirical, and they are dependent on the empirical parameters. In this paper, the relative air coefficient of permeability was estimated using the concept of the pore-size distribution function. In the method proposed in this paper, no empirical parameters were adopted, and the estimation results purely depended on the soil-water characteristic curve. The proposed method was verified against experimental data from published literature.

Original languageEnglish
Pages (from-to)505-513
Number of pages9
JournalCanadian Geotechnical Journal
Volume56
Issue number4
DOIs
Publication statusPublished - 2019
Externally publishedYes

Keywords

  • Air permeability function
  • Estimation
  • Pore-size distribution function
  • Soil-water characteristic curve

ASJC Scopus subject areas

  • Civil and Structural Engineering

Fingerprint Dive into the research topics of 'Estimation of air permeability function from soil-water characteristic curve'. Together they form a unique fingerprint.

Cite this