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A flexible water content probe for unsaturated soil column experiments

E. D. Mattson, K. E. Baker, C. D. Palmer, C. R. Breckenridge, J. M. Svoboda and R. W. Smith
A flexible water content probe for unsaturated soil column experiments
Vadose Zone Journal (May 2006) 5 (2): 805-808


A commercially available soil moisture probe was modified by replacing rigid electrode waveguides with flexible electrode traces that can be attached to the interior of soil column walls. This new design minimizes soil packing difficulties and potential bias in water and solute flow pathways commonly associated with rigid probe installations in column experiments. Tests demonstrated that the modified flexible electrode design maintains a voltage response that is proportional to the electrode trace length and is reduced by approximately one-half when only one side of the electrode trace is in contact with the soil media. Laboratory experiments confirmed that the longer electrode traces attached to the interior of a column wall have a comparable sensitivity of that of a commercially available rigid probe inserted horizontally across the diameter of a soil column. The replacement of the rigid electrode with a flexible electrode offers an improved method of measuring the water content in solute transport experiments while minimizing sensor intrusion into laboratory soil columns.

ISSN: 1539-1663
Serial Title: Vadose Zone Journal
Serial Volume: 5
Serial Issue: 2
Title: A flexible water content probe for unsaturated soil column experiments
Affiliation: Idaho National Laboratory, Geosciences Department, Idaho Falls, ID, United States
Pages: 805-808
Published: 200605
Text Language: English
Publisher: Soil Science Society of America, Madison, WI, United States
References: 14
Accession Number: 2006-056731
Categories: Hydrogeology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: University of Idaho at Idaho Falls, USA, United States
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: 200631
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