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

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Citation
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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Identification
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
Publisher:MDPI
Topic
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
Language:English
Status:Completed
Constraints
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
Geographic
North:-no map data
East:-
South:-
West:-
Measurement Region:Germany
Measurement Location:--Germany--
Specific Informations - Publication
Status:Accepted
Review:PeerReview
Year:2017
Type:Article
Article Type:Journal
Source:Sensors
Issue:1
Volume:17
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
Subproject:C1
Funding Phase:3
Metadata Language:English
Metadata Version:V41
Dataset Metrics
Page Visits:381
Metadata Downloads:0
Dataset Downloads:3
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