Bed conduction impact on fiber optic distributed temperature sensing water temperature measurements

Error in distributed temperature sensing (DTS) water temperature measurements may be introduced by contact of the fiber optic cable sensor with bed materials (e.g., seafloor, lakebed, streambed). Heat conduction from the bed materials can affect cable temperature and the resulting DTS measurements....

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Main Authors: T. O'Donnell Meininger, J. S. Selker
Format: Article
Language:English
Published: Copernicus Publications 2015-02-01
Series:Geoscientific Instrumentation, Methods and Data Systems
Online Access:http://www.geosci-instrum-method-data-syst.net/4/19/2015/gi-4-19-2015.pdf
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spelling doaj-83e81e16a62441adbc04a72a2408c7042020-11-25T01:05:24ZengCopernicus PublicationsGeoscientific Instrumentation, Methods and Data Systems2193-08562193-08642015-02-0141192210.5194/gi-4-19-2015Bed conduction impact on fiber optic distributed temperature sensing water temperature measurementsT. O'Donnell Meininger0J. S. Selker1Oregon State University, Department of Biological and Ecological Engineering, Corvallis, Oregon, USAOregon State University, Department of Biological and Ecological Engineering, Corvallis, Oregon, USAError in distributed temperature sensing (DTS) water temperature measurements may be introduced by contact of the fiber optic cable sensor with bed materials (e.g., seafloor, lakebed, streambed). Heat conduction from the bed materials can affect cable temperature and the resulting DTS measurements. In the Middle Fork John Day River, apparent water temperature measurements were influenced by cable sensor contact with aquatic vegetation and fine sediment bed materials. Affected cable segments measured a diurnal temperature range reduced by 10% and lagged by 20–40 min relative to that of ambient stream temperature. The diurnal temperature range deeper within the vegetation–sediment bed material was reduced 70% and lagged 240 min relative to ambient stream temperature. These site-specific results illustrate the potential magnitude of bed-conduction impacts with buried DTS measurements. Researchers who deploy DTS for water temperature monitoring should understand the importance of the environment into which the cable is placed on the range and phase of temperature measurements.http://www.geosci-instrum-method-data-syst.net/4/19/2015/gi-4-19-2015.pdf
collection DOAJ
language English
format Article
sources DOAJ
author T. O'Donnell Meininger
J. S. Selker
spellingShingle T. O'Donnell Meininger
J. S. Selker
Bed conduction impact on fiber optic distributed temperature sensing water temperature measurements
Geoscientific Instrumentation, Methods and Data Systems
author_facet T. O'Donnell Meininger
J. S. Selker
author_sort T. O'Donnell Meininger
title Bed conduction impact on fiber optic distributed temperature sensing water temperature measurements
title_short Bed conduction impact on fiber optic distributed temperature sensing water temperature measurements
title_full Bed conduction impact on fiber optic distributed temperature sensing water temperature measurements
title_fullStr Bed conduction impact on fiber optic distributed temperature sensing water temperature measurements
title_full_unstemmed Bed conduction impact on fiber optic distributed temperature sensing water temperature measurements
title_sort bed conduction impact on fiber optic distributed temperature sensing water temperature measurements
publisher Copernicus Publications
series Geoscientific Instrumentation, Methods and Data Systems
issn 2193-0856
2193-0864
publishDate 2015-02-01
description Error in distributed temperature sensing (DTS) water temperature measurements may be introduced by contact of the fiber optic cable sensor with bed materials (e.g., seafloor, lakebed, streambed). Heat conduction from the bed materials can affect cable temperature and the resulting DTS measurements. In the Middle Fork John Day River, apparent water temperature measurements were influenced by cable sensor contact with aquatic vegetation and fine sediment bed materials. Affected cable segments measured a diurnal temperature range reduced by 10% and lagged by 20–40 min relative to that of ambient stream temperature. The diurnal temperature range deeper within the vegetation–sediment bed material was reduced 70% and lagged 240 min relative to ambient stream temperature. These site-specific results illustrate the potential magnitude of bed-conduction impacts with buried DTS measurements. Researchers who deploy DTS for water temperature monitoring should understand the importance of the environment into which the cable is placed on the range and phase of temperature measurements.
url http://www.geosci-instrum-method-data-syst.net/4/19/2015/gi-4-19-2015.pdf
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