[1672] - Effective Calibration of Low-Cost Soil Water Content Sensors

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Bogena, H., Huisman, J. A., Schilling, B., Weuthen, A., Vereecken, H., 2017. Effective Calibration of Low-Cost Soil Water Content Sensors. Sensors, 17 (1), 1 - 12. DOI: 10.3390/s17010208.
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Title(s):Main Title: Effective Calibration of Low-Cost Soil Water Content Sensors
Description(s):Abstract: Soil water content is a key variable for understanding and modelling ecohydrological processes. Low-cost electromagnetic sensors are increasingly being used to characterize the spatio-temporal dynamics of soil water content, despite the reduced accuracy of such sensors as compared to reference electromagnetic soil water content sensing methods such as time domain reflectometry. Here, we present an effective calibration method to improve the measurement accuracy of low-cost soil water content sensors taking the recently developed SMT100 sensor (Truebner GmbH, Neustadt, Germany) as an example. We calibrated the sensor output of more than 700 SMT100 sensors to permittivity using a standard procedure based on five reference media with a known apparent dielectric permittivity (1 < Ka < 34.8). Our results showed that a sensor-specific calibration improved the accuracy of the calibration compared to single “universal” calibration. The associated additional effort in calibrating each sensor individually is relaxed by a dedicated calibration setup that enables the calibration of large numbers of sensors in limited time while minimizing errors in the calibration process.
Identifier(s):DOI: 10.3390/s17010208
Responsible Party
Creator(s):Author: Heye Bogena
Author: Johan A. Huisman
Author: Bernd Schilling
Author: Ansgar Weuthen
Author: Harry Vereecken
TR32 Topic:Soil
Related Sub-project(s):C1
Subject(s):CRC/TR32 Keywords: Hydrological Modelling
File Details
File Name:Bogena2017.pdf
Data Type:Text
File Size:2359 kB (2.304 MB)
Date(s):Available: 2017-01-21
Mime Type:application/pdf
Data Format:PDF
Download Permission:Free
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
Licence:TR32DB Data policy agreement
North:-no map data
Measurement Region:Germany
Measurement Location:--Germany--
Specific Informations - Publication
Article Type:Journal
Number Of Pages:12
Page Range:1 - 12
Metadata Details
Metadata Creator:Michael Stockinger
Metadata Created:2017-05-31
Metadata Last Updated:2017-06-01
Funding Phase:3
Metadata Language:English
Metadata Version:V41
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Page Visits:392
Metadata Downloads:0
Dataset Downloads:3
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