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Analysis of the hysteretic hydraulic properties of unsaturated soil

L. Zhuang, C. R. Bezerra Coelho, S. M. Hassanizadeh and M. T. van Genuchten
Analysis of the hysteretic hydraulic properties of unsaturated soil
Vadose Zone Journal (May 2017) 16 (5)

Abstract

Knowledge of the unsaturated soil hydraulic properties is essential for modeling water flow and solute transport processes in variably saturated subsurface systems. Various experimental setups have been developed over the years to measure the hydraulic properties. We devised a relatively simple setup for simultaneous measurement of the water retention and unsaturated hydraulic conductivity curves using multistep flux (MSF) and hanging water column (HWC) experiments. Our focus was especially on medium- and coarse-textured sands having relatively narrow particle-size distributions as reflected by the van Genuchten-Mualem (VGM) hydraulic parameter n Values of the VGM parameter n for some of the sands we used were as high as 15. We also measured the hydraulic properties using the HYPROP evaporation method. The MSF and HWC results showed excellent agreement, but deviated slightly from independent data obtained with the HYPROP measurement system.


ISSN: 1539-1663
Serial Title: Vadose Zone Journal
Serial Volume: 16
Serial Issue: 5
Title: Analysis of the hysteretic hydraulic properties of unsaturated soil
Affiliation: Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
Published: 201705
Text Language: English
Publisher: Soil Science Society of America, Madison, WI, United States
Number of pages: 9
References: 34
Accession Number: 2017-042165
Categories: Engineering geologyHydrogeology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
Secondary Affiliation: Federal University of Rio de Janeiro, BRA, Brazil
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201723
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