Citrus orchard evapotranspiration : comparison between eddy covariance measurements and the FAO-56 approach estimates
| Autor: | Gilles Boulet, Jamal Ezzahar, Salah Er-Raki, Lahoucine Hanich, N. Guemouria, Abdelghani Chehbouni, Said Khabba |
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| Přispěvatelé: | Université Cadi Ayyad [Marrakech] (UCA), Centre d'études spatiales de la biosphère (CESBIO), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Equipe Ecologie Végétale, Sol et Environnement, Faculté des Sciences Semlalia Marrakech, Equipe Ecologie Végétale, Sol & Environnement Marrakech, Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Faculté des Sciences Semlalia [Marrakech], Université Cadi Ayyad [Marrakech] (UCA)-Université Cadi Ayyad [Marrakech] (UCA) |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Irrigation
010504 meteorology & atmospheric sciences Mean squared error irrigated citrus semi-arid Eddy covariance evapotranspiration Plant Science Drip irrigation FAO-56 model 01 natural sciences [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems Evapotranspiration Surface irrigation Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences Mathematics 2. Zero hunger Hydrology region Agroforestry Flooding (psychology) citrus orchard 04 agricultural and veterinary sciences Crop coefficient 040103 agronomy & agriculture drip and flood irrigation 0401 agriculture forestry and fisheries |
| Zdroj: | Plant Biosystems Plant Biosystems, Taylor & Francis, 2009, 143 (1), pp.201-208. ⟨10.1080/11263500802709897⟩ Plant Biosystems, 2009, 143 (1), pp.201-208. ⟨10.1080/11263500802709897⟩ |
| ISSN: | 1126-3504 |
| DOI: | 10.1080/11263500802709897⟩ |
| Popis: | The aim of this study is to use the FAO-56 single and dual crop coefficient approaches to estimate actual evapotranspiration (ETa) over irrigated citrus orchard under drip and flood irrigations in Marrakech, Morocco. The results showed that, by using crop coefficients suggested by FAO-56 paper, the performance of both approaches was poor for two irrigation treatments. The Root Mean Squared Error (RMSE) between measured and simulated ETa values over irrigated citrus under drip irrigation was about 1.43 and 1.27 mm/day for the single and dual approaches respectively, while the corresponding statistics for the citrus irrigated by flooding technique was 1.87 and 2.48 mm/day. After the determination of the appropriate values of the crop coefficient (Kc) based on eddy covariance measurements of ETa, the performance of both approaches greatly improved. The obtained values of crop coefficient were below than the FAO-56 values by about 20%. The low Kc values obtained reflect the practicing of drip irrigation for one field and the low value of cover fraction for the other field. Additionally, the efficiency of the irrigation practices was investigated by comparing the measured Kc for two fields. The results showed that an important amount of water was lost by direct soil evaporation on citrus orchard irrigated by flooding technique. Key words: Crop coefficient, drip and flood irrigation, evapotranspiration, FAO-56 model, irrigated citrus. |
| Databáze: | OpenAIRE |
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