TDR measurement of stem and soil water content in two Mediterranean oak species
Since 1990s, time domain reflectometry (TDR) has been applied to estimate the stem water content of living trees. Here, new calibration equations relating the apparent dielectric constant (Ka ) to the volumetric water content (θ) were developed for two Mediterranean oak species. Our calibration equations differ from those previously calculated for other species, suggesting that stem water contents could be monitored more accurately using species-specific curves. The stem water content in the trees of these species and the surrounding soil were monitored with TDR to examine the feasibility of this technology for recording changes in trunk water storage. The average stem water contents of the oaks reflect the soil water contents, and the temporal differences observed (17%) point to the importance of trunk water for coping with soil water deficit. Although it would be very useful to obtain a single function to estimate the stem water content of trees, it remains necessary to obtain the results in more species.
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International Association of Hydrological Sciences
2008
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Online Access: | http://hdl.handle.net/10261/66012 http://dx.doi.org/10.13039/501100006280 |
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dig-irnas-es-10261-660122016-02-17T13:06:28Z TDR measurement of stem and soil water content in two Mediterranean oak species Hernández Santana, V. Martínez Fernández, J. Ministerio de Ciencia y Tecnología (España) Ministerio de Medio Ambiente (España) Since 1990s, time domain reflectometry (TDR) has been applied to estimate the stem water content of living trees. Here, new calibration equations relating the apparent dielectric constant (Ka ) to the volumetric water content (θ) were developed for two Mediterranean oak species. Our calibration equations differ from those previously calculated for other species, suggesting that stem water contents could be monitored more accurately using species-specific curves. The stem water content in the trees of these species and the surrounding soil were monitored with TDR to examine the feasibility of this technology for recording changes in trunk water storage. The average stem water contents of the oaks reflect the soil water contents, and the temporal differences observed (17%) point to the importance of trunk water for coping with soil water deficit. Although it would be very useful to obtain a single function to estimate the stem water content of trees, it remains necessary to obtain the results in more species. The Spanish Ministry of Science and Technology (Project REN2003-00381) and the Spanish Ministry of Environment (Project RESEL). Peer Reviewed 2013-02-05T12:35:41Z 2013-02-05T12:35:41Z 2008 2013-02-05T12:35:41Z artículo http://purl.org/coar/resource_type/c_6501 issn: 0262-6667 e-issn: 2150-3435 Hydrological Sciences Journal 53(4): 921-931 (2008) http://hdl.handle.net/10261/66012 http://dx.doi.org/10.13039/501100006280 en open International Association of Hydrological Sciences |
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Since 1990s, time domain reflectometry (TDR) has been applied to estimate the stem water content of living trees. Here, new calibration equations relating the apparent dielectric constant (Ka ) to the volumetric water content (θ) were developed for two Mediterranean oak species. Our calibration equations differ from those previously calculated for other species, suggesting that stem water contents could be monitored more accurately using species-specific curves. The stem water content in the trees of these species and the surrounding soil were monitored with TDR to examine the feasibility of this technology for recording changes in trunk water storage. The average stem water contents of the oaks reflect the soil water contents, and the temporal differences observed (17%) point to the importance of trunk water for coping with soil water deficit. Although it would be very useful to obtain a single function to estimate the stem water content of trees, it remains necessary to obtain the results in more species. |
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Ministerio de Ciencia y Tecnología (España) |
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Ministerio de Ciencia y Tecnología (España) Hernández Santana, V. Martínez Fernández, J. |
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Hernández Santana, V. Martínez Fernández, J. |
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Hernández Santana, V. Martínez Fernández, J. TDR measurement of stem and soil water content in two Mediterranean oak species |
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Hernández Santana, V. |
title |
TDR measurement of stem and soil water content in two Mediterranean oak species |
title_short |
TDR measurement of stem and soil water content in two Mediterranean oak species |
title_full |
TDR measurement of stem and soil water content in two Mediterranean oak species |
title_fullStr |
TDR measurement of stem and soil water content in two Mediterranean oak species |
title_full_unstemmed |
TDR measurement of stem and soil water content in two Mediterranean oak species |
title_sort |
tdr measurement of stem and soil water content in two mediterranean oak species |
publisher |
International Association of Hydrological Sciences |
publishDate |
2008 |
url |
http://hdl.handle.net/10261/66012 http://dx.doi.org/10.13039/501100006280 |
work_keys_str_mv |
AT hernandezsantanav tdrmeasurementofstemandsoilwatercontentintwomediterraneanoakspecies AT martinezfernandezj tdrmeasurementofstemandsoilwatercontentintwomediterraneanoakspecies |
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1777664549854380032 |