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

✍ Scribed by Masahide Ishizuka; Masao Mikami

Publisher: John Wiley and Sons
Year: 2005
Tongue: English
Weight: 176 KB
Volume: 19
Category: Article
ISSN: 0885-6087
DOI: 10.1002/hyp.5989

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✦ Synopsis

Abstract

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 m^3^ m^−3^), and such sensor applicability is not yet confirmed. In this study we examine θ − t and θ − ε~bulk~ 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.

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