Physically based closed-form expression for the bimodal unsaturated hydraulic conductivity function

Shiyu Liu, Noriyuki Yasufuku, Qiang Liu, Hemanta Hazarika

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Simulation of flow and contaminant transport through the vadose zone requires accurate parameterization of the soil hydraulic properties. This requirement is particularly important for soils with a complex structure. In the present study, a physically based closed-form expression for the bimodal unsaturated hydraulic conductivity function is proposed for soils with bimodal pore-size distribution. It combines the bimodal representation of the soil-water characteristic curve (SWCC) function of Liu with the conductivity representation model of Mualem. The proposed equations are defined by parameters that have physical significance, which can be related to the properties of the materials. Experimental data for the representation of bimodal SWCCs and corresponding hydraulic conductivity curves were used to demonstrate the applicability of the proposed functions. The proposed approaches resulted in good agreement with experimental data. These functions can potentially be used as an effective tool for identifying hydraulic porosities in mediums with a complex structure.

Original languageEnglish
Pages (from-to)328-334
Number of pages7
JournalWater Science and Technology
Volume68
Issue number2
DOIs
Publication statusPublished - 2013

Fingerprint

Hydraulic conductivity
hydraulic conductivity
Soils
soil
Hydraulics
pollutant transport
hydraulic property
vadose zone
parameterization
conductivity
Parameterization
soil water
porosity
Pore size
hydraulics
Porosity
Impurities
simulation
Water

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Water Science and Technology

Cite this

Physically based closed-form expression for the bimodal unsaturated hydraulic conductivity function. / Liu, Shiyu; Yasufuku, Noriyuki; Liu, Qiang; Hazarika, Hemanta.

In: Water Science and Technology, Vol. 68, No. 2, 2013, p. 328-334.

Research output: Contribution to journalArticle

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