Using Capacitance Sensors for the Continuous Measurement of the Water Content in the Litter Layer of Forest Soil
Little is known about the wetting and drying processes of the litter layer (L layer), likely because of technical difficulties inherent in nondestructive water content (WC) monitoring. We developed a method for continuously measuring the WC of leaf litter (the “LWC method”) in situ using capacitance...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Applied and Environmental Soil Science |
| Online Access: | http://dx.doi.org/10.1155/2014/627129 |
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| author | Mioko Ataka Yuji Kominami Takafumi Miyama Kenichi Yoshimura Mayuko Jomura Makoto Tani |
| author_facet | Mioko Ataka Yuji Kominami Takafumi Miyama Kenichi Yoshimura Mayuko Jomura Makoto Tani |
| author_sort | Mioko Ataka |
| collection | DOAJ |
| description | Little is known about the wetting and drying processes of the litter layer (L layer), likely because of technical difficulties inherent in nondestructive water content (WC) monitoring. We developed a method for continuously measuring the WC of leaf litter (the “LWC method”) in situ using capacitance sensors. To test variants of this approach, five (for the LWC_5) or ten (for the LWC_10 method) Quercus serrata leaves were attached around capacitance sensors. The output voltage used for each LWC method was linearly correlated with the gravimetric WC (LWC_5: R2=0.940; LWC_10: R2=0.942), producing different slopes for each calibration line. For in situ continuous measurements of WC in the L layer, two sensors were used, one placed on top of the L layer and the other at the boundary between the L and mineral layers. The average continuous WC of the L layer was then calculated from the output voltage of the two sensors and the calibration function, and this value was linearly correlated with the gravimetric WC (R2=0.697). However, because the L layer characteristics (e.g., thickness, water-holding capacity, and species composition) may differ among study sites, appropriate approaches for measuring this layer’s moisture properties may be needed. |
| format | Article |
| id | doaj-art-4d325b32544f464dae6359ee7cf239bf |
| institution | OA Journals |
| issn | 1687-7667 1687-7675 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Applied and Environmental Soil Science |
| spelling | doaj-art-4d325b32544f464dae6359ee7cf239bf2025-08-20T02:38:38ZengWileyApplied and Environmental Soil Science1687-76671687-76752014-01-01201410.1155/2014/627129627129Using Capacitance Sensors for the Continuous Measurement of the Water Content in the Litter Layer of Forest SoilMioko Ataka0Yuji Kominami1Takafumi Miyama2Kenichi Yoshimura3Mayuko Jomura4Makoto Tani5Laboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, JapanKansai Research Center, Forestry and Forest Products Research Institute, Kyoto 612-0855, JapanKansai Research Center, Forestry and Forest Products Research Institute, Kyoto 612-0855, JapanKansai Research Center, Forestry and Forest Products Research Institute, Kyoto 612-0855, JapanCollege of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa 252-0880, JapanLaboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, JapanLittle is known about the wetting and drying processes of the litter layer (L layer), likely because of technical difficulties inherent in nondestructive water content (WC) monitoring. We developed a method for continuously measuring the WC of leaf litter (the “LWC method”) in situ using capacitance sensors. To test variants of this approach, five (for the LWC_5) or ten (for the LWC_10 method) Quercus serrata leaves were attached around capacitance sensors. The output voltage used for each LWC method was linearly correlated with the gravimetric WC (LWC_5: R2=0.940; LWC_10: R2=0.942), producing different slopes for each calibration line. For in situ continuous measurements of WC in the L layer, two sensors were used, one placed on top of the L layer and the other at the boundary between the L and mineral layers. The average continuous WC of the L layer was then calculated from the output voltage of the two sensors and the calibration function, and this value was linearly correlated with the gravimetric WC (R2=0.697). However, because the L layer characteristics (e.g., thickness, water-holding capacity, and species composition) may differ among study sites, appropriate approaches for measuring this layer’s moisture properties may be needed.http://dx.doi.org/10.1155/2014/627129 |
| spellingShingle | Mioko Ataka Yuji Kominami Takafumi Miyama Kenichi Yoshimura Mayuko Jomura Makoto Tani Using Capacitance Sensors for the Continuous Measurement of the Water Content in the Litter Layer of Forest Soil Applied and Environmental Soil Science |
| title | Using Capacitance Sensors for the Continuous Measurement of the Water Content in the Litter Layer of Forest Soil |
| title_full | Using Capacitance Sensors for the Continuous Measurement of the Water Content in the Litter Layer of Forest Soil |
| title_fullStr | Using Capacitance Sensors for the Continuous Measurement of the Water Content in the Litter Layer of Forest Soil |
| title_full_unstemmed | Using Capacitance Sensors for the Continuous Measurement of the Water Content in the Litter Layer of Forest Soil |
| title_short | Using Capacitance Sensors for the Continuous Measurement of the Water Content in the Litter Layer of Forest Soil |
| title_sort | using capacitance sensors for the continuous measurement of the water content in the litter layer of forest soil |
| url | http://dx.doi.org/10.1155/2014/627129 |
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