Measurement of soil water content in a hyper-arid environment using time-domain reflectometry sensors

Time‐domain reflectometry (TDR) sensors have been widely used in many fields for measurement of soil water content. However, few TDR sensors have been used in a hyper‐arid environment (e.g. less than 0·05 m3 m−3), and such sensor applicability is not yet confirmed. In this study we examine θ − t and...

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Bibliographic Details
Published in:Hydrological processes 2005-12, Vol.19 (19), p.3911-3920
Main Authors: Ishizuka, Masahide, Mikami, Masao
Format: Article
Language:English
Subjects:
hyper-arid environment
sensor calibration
soil water content
temperature dependency
time-domain reflectometry (TDR)
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Summary:Time‐domain reflectometry (TDR) sensors have been widely used in many fields for measurement of soil water content. However, few TDR sensors have been used in a hyper‐arid environment (e.g. less than 0·05 m3 m−3), and such sensor applicability is not yet confirmed. In this study we examine θ − t and θ − εbulk relations and temperature dependency for natural sand and glass beads in a laboratory using commercially available TDR sensors. As a result, this study clarifies that TDR sensors are applicable even in a hyper‐arid environment when calibration was properly made. We also focus on a specific range of soil water content, which leads to a highly precise calibration equation. Copyright © 2005 John Wiley & Sons, Ltd.
ISSN:0885-6087
1099-1085
DOI:10.1002/hyp.5989