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Original title:
The importance of the radiation balance for water retention of the landscape
Authors: Kofroňová, Jitka
Document type: Papers
Conference/Event: Kostelecké inspirování 2018 /10./, Kostelec nad Černými lesy (CZ), 20181122
Year: 2018
Language: eng
Abstract: As part of the radiation balance, longwave radiation is one of the factors needed to estimate potential evapotranspiration (PET). Since the longwave radiation balance is rarely measured, many computational methods have been designed. In this study, we report on the difference between the observed longwave radiation balance and modelling results obtained using the two main procedures outlined in Manuals 24 and 56 of the FAO. The performance of these equations was evaluated in the warmer months (April to October) over eight years at the Liz experimental catchment in the Bohemian Forest (Czech Republic). The coefficients of both methods were also calibrated based on local conditions. Four commonly used methods were used to calculate the PET (Penman-Monteith, Pristley and Taylor, Kimberley-Penman, Thom and Oliver). The use of default coefficient values gave errors of 40 100 mm and 0 20 mm for the seasonal PET estimates for FAO56 and FAO24, respectively (the PET was usually overestimated). Parameter calibration decreased the FAO56 error to less than 20 mm per season (FAO24 remained unaffected by the calibration). The FAO56 approach with calibrated coefficients proved to be more suitable for estimation of the longwave radiation balance.
Keywords: potential evapotranspiration (PET); radiation balance; water retention
Host item entry: Kostelecké inspirování 2018: Sborník abstraktů, ISBN 978-80-213-2894-5
Institution: Institute of Hydrodynamics AS ČR (web)
Document availability information: Fulltext is available in the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0291390
Permalink: http://www.nusl.cz/ntk/nusl-390767
The record appears in these collections:
Research > Institutes ASCR > Institute of Hydrodynamics
Conference materials > Papers
Authors: Kofroňová, Jitka
Document type: Papers
Conference/Event: Kostelecké inspirování 2018 /10./, Kostelec nad Černými lesy (CZ), 20181122
Year: 2018
Language: eng
Abstract: As part of the radiation balance, longwave radiation is one of the factors needed to estimate potential evapotranspiration (PET). Since the longwave radiation balance is rarely measured, many computational methods have been designed. In this study, we report on the difference between the observed longwave radiation balance and modelling results obtained using the two main procedures outlined in Manuals 24 and 56 of the FAO. The performance of these equations was evaluated in the warmer months (April to October) over eight years at the Liz experimental catchment in the Bohemian Forest (Czech Republic). The coefficients of both methods were also calibrated based on local conditions. Four commonly used methods were used to calculate the PET (Penman-Monteith, Pristley and Taylor, Kimberley-Penman, Thom and Oliver). The use of default coefficient values gave errors of 40 100 mm and 0 20 mm for the seasonal PET estimates for FAO56 and FAO24, respectively (the PET was usually overestimated). Parameter calibration decreased the FAO56 error to less than 20 mm per season (FAO24 remained unaffected by the calibration). The FAO56 approach with calibrated coefficients proved to be more suitable for estimation of the longwave radiation balance.
Keywords: potential evapotranspiration (PET); radiation balance; water retention
Host item entry: Kostelecké inspirování 2018: Sborník abstraktů, ISBN 978-80-213-2894-5
Institution: Institute of Hydrodynamics AS ČR (web)
Document availability information: Fulltext is available in the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0291390
Permalink: http://www.nusl.cz/ntk/nusl-390767
The record appears in these collections:
Research > Institutes ASCR > Institute of Hydrodynamics
Conference materials > Papers
Record created 2019-01-07, last modified 2021-11-24