Calculation of Potential Evapotranspiration and Calibration of the Hargreaves Equation Using Geostatistical Methods over the Last 10 Years in Central Italy
Potential evapotranspiration (ET0) is an indicator of great interest for water budget analysis and the agricultural sector. Therefore, the purpose of this study was to make the calculation reliable even if only the temperature data were present. In this research, the ET0 was initially calculated for...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-08-01
|
| Series: | Geosciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3263/11/8/348 |
| _version_ | 1827685178251673600 |
|---|---|
| author | Matteo Gentilucci Margherita Bufalini Marco Materazzi Maurizio Barbieri Domenico Aringoli Piero Farabollini Gilberto Pambianchi |
| author_facet | Matteo Gentilucci Margherita Bufalini Marco Materazzi Maurizio Barbieri Domenico Aringoli Piero Farabollini Gilberto Pambianchi |
| author_sort | Matteo Gentilucci |
| collection | DOAJ |
| description | Potential evapotranspiration (ET0) is an indicator of great interest for water budget analysis and the agricultural sector. Therefore, the purpose of this study was to make the calculation reliable even if only the temperature data were present. In this research, the ET0 was initially calculated for a limited number of weather stations (12) using the Penman–Monteith method. In some cases, the simplified Penman–Monteith formula was adopted, while in others, as in the case of mountain weather stations, the complete formula was employed to consider the differences in vegetation, deduced from satellite surveys. Subsequently, the ET0 was calculated with the Hargreaves–Samani (HS) formula, calibrating the Hargreaves coefficient, through the spatialization of ET0, by the geostatistical method. The results showed a high reliability of the HS method in comparison with simplified PM (PM) method, and complete Penman–Monteith (cPM) method, with a minimum calibration of the empirical Hargreaves coefficient. In particular, a very good correlation between the results obtained in the mountain environment with the uncalibrated HS method and the cPM method was also observed in this area, while PM showed discordant and much higher results than ET0 compared with the other methods. It follows that this procedure allowed a more accurate estimate of potential evapotranspiration with a view to territory management, both in terms of water resources and the irrigation needs of the vegetation. |
| first_indexed | 2024-03-10T08:47:16Z |
| format | Article |
| id | doaj.art-e1a732d1482b490b8a1a315b7092253b |
| institution | Directory Open Access Journal |
| issn | 2076-3263 |
| language | English |
| last_indexed | 2024-03-10T08:47:16Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Geosciences |
| spelling | doaj.art-e1a732d1482b490b8a1a315b7092253b2023-11-22T07:48:07ZengMDPI AGGeosciences2076-32632021-08-0111834810.3390/geosciences11080348Calculation of Potential Evapotranspiration and Calibration of the Hargreaves Equation Using Geostatistical Methods over the Last 10 Years in Central ItalyMatteo Gentilucci0Margherita Bufalini1Marco Materazzi2Maurizio Barbieri3Domenico Aringoli4Piero Farabollini5Gilberto Pambianchi6Geology Division, School of Science and Technology, University of Camerino, 62032 Camerino, ItalyGeology Division, School of Science and Technology, University of Camerino, 62032 Camerino, ItalyGeology Division, School of Science and Technology, University of Camerino, 62032 Camerino, ItalyDepartment of Earth Sciences, Sapienza University of Rome, 00185 Rome, ItalyGeology Division, School of Science and Technology, University of Camerino, 62032 Camerino, ItalyGeology Division, School of Science and Technology, University of Camerino, 62032 Camerino, ItalyGeology Division, School of Science and Technology, University of Camerino, 62032 Camerino, ItalyPotential evapotranspiration (ET0) is an indicator of great interest for water budget analysis and the agricultural sector. Therefore, the purpose of this study was to make the calculation reliable even if only the temperature data were present. In this research, the ET0 was initially calculated for a limited number of weather stations (12) using the Penman–Monteith method. In some cases, the simplified Penman–Monteith formula was adopted, while in others, as in the case of mountain weather stations, the complete formula was employed to consider the differences in vegetation, deduced from satellite surveys. Subsequently, the ET0 was calculated with the Hargreaves–Samani (HS) formula, calibrating the Hargreaves coefficient, through the spatialization of ET0, by the geostatistical method. The results showed a high reliability of the HS method in comparison with simplified PM (PM) method, and complete Penman–Monteith (cPM) method, with a minimum calibration of the empirical Hargreaves coefficient. In particular, a very good correlation between the results obtained in the mountain environment with the uncalibrated HS method and the cPM method was also observed in this area, while PM showed discordant and much higher results than ET0 compared with the other methods. It follows that this procedure allowed a more accurate estimate of potential evapotranspiration with a view to territory management, both in terms of water resources and the irrigation needs of the vegetation.https://www.mdpi.com/2076-3263/11/8/348interpolationGISET0krigingPenman–MonteithHargreaves |
| spellingShingle | Matteo Gentilucci Margherita Bufalini Marco Materazzi Maurizio Barbieri Domenico Aringoli Piero Farabollini Gilberto Pambianchi Calculation of Potential Evapotranspiration and Calibration of the Hargreaves Equation Using Geostatistical Methods over the Last 10 Years in Central Italy Geosciences interpolation GIS ET0 kriging Penman–Monteith Hargreaves |
| title | Calculation of Potential Evapotranspiration and Calibration of the Hargreaves Equation Using Geostatistical Methods over the Last 10 Years in Central Italy |
| title_full | Calculation of Potential Evapotranspiration and Calibration of the Hargreaves Equation Using Geostatistical Methods over the Last 10 Years in Central Italy |
| title_fullStr | Calculation of Potential Evapotranspiration and Calibration of the Hargreaves Equation Using Geostatistical Methods over the Last 10 Years in Central Italy |
| title_full_unstemmed | Calculation of Potential Evapotranspiration and Calibration of the Hargreaves Equation Using Geostatistical Methods over the Last 10 Years in Central Italy |
| title_short | Calculation of Potential Evapotranspiration and Calibration of the Hargreaves Equation Using Geostatistical Methods over the Last 10 Years in Central Italy |
| title_sort | calculation of potential evapotranspiration and calibration of the hargreaves equation using geostatistical methods over the last 10 years in central italy |
| topic | interpolation GIS ET0 kriging Penman–Monteith Hargreaves |
| url | https://www.mdpi.com/2076-3263/11/8/348 |
| work_keys_str_mv | AT matteogentilucci calculationofpotentialevapotranspirationandcalibrationofthehargreavesequationusinggeostatisticalmethodsoverthelast10yearsincentralitaly AT margheritabufalini calculationofpotentialevapotranspirationandcalibrationofthehargreavesequationusinggeostatisticalmethodsoverthelast10yearsincentralitaly AT marcomaterazzi calculationofpotentialevapotranspirationandcalibrationofthehargreavesequationusinggeostatisticalmethodsoverthelast10yearsincentralitaly AT mauriziobarbieri calculationofpotentialevapotranspirationandcalibrationofthehargreavesequationusinggeostatisticalmethodsoverthelast10yearsincentralitaly AT domenicoaringoli calculationofpotentialevapotranspirationandcalibrationofthehargreavesequationusinggeostatisticalmethodsoverthelast10yearsincentralitaly AT pierofarabollini calculationofpotentialevapotranspirationandcalibrationofthehargreavesequationusinggeostatisticalmethodsoverthelast10yearsincentralitaly AT gilbertopambianchi calculationofpotentialevapotranspirationandcalibrationofthehargreavesequationusinggeostatisticalmethodsoverthelast10yearsincentralitaly |