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Heated Distributed Temperature Sensing for Field Scale Soil Moisture Monitoring


Authors: A. M. Striegl
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Created: Apr 01, 2018 at 6:12 p.m.
Last updated: Apr 09, 2018 at 6:24 p.m.
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Abstract

Characterizing both spatial and temporal soil moisture (θ) dynamics at site scales is difficult with existing technologies. To address this shortcoming, we developed a distributed soil moisture sensing system that employs a distributed temperature sensing system to monitor thermal response at 2 m intervals along the length of a buried cable which is subjected to heat pulses. The cable temperature response to heating, which is strongly dependent on soil moisture, was empirically related to colocated, dielectric-based θ measurements at three locations. Spatially distributed, and temporally continuous estimates of θ were obtained in dry conditions (θ ≤ 0.31) using this technology (root mean square error [RMSE] = 0.016), but insensitivity of the instrument response curve adversely affected accuracy under wet conditions (RMSE = 0.050).

Raw project data is available by contacting ctemps@unr.edu

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How to Cite

Striegl, A. M. (2018). Heated Distributed Temperature Sensing for Field Scale Soil Moisture Monitoring, HydroShare, http://www.hydroshare.org/resource/fb92ab29fba44539ad39ab078d300159

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
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