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| Ortega-Farias, S.; Olioso, A.; Antonioletti, R.; Brisson, N.. |
| The Penman-Monteith model with a variable surface canopy resistance (rcv) was evaluated to estimate hourly and daily crop evapotranspiration (ETc) over a soybean canopy for different soil water status and atmospheric conditions. The hourly values of rcv were computed as a function of environmental variables (air temperature, vapor pressure deficit, net radiation) and a normalized soil water factor (F), which varies between 0 (wilting point, thetaWP) and 1 (field capacity, thetaFC). The performance of the Penman-Monteith model (ETPM) was evaluated using hourly and daily values of ETc obtained from the combined aerodynamic method (ETR). On an hourly basis, the overall standard error of estimate (SEE) and the absolute relative error (ARE) were 0.06 mm h–1 (41... |
| Tipo: Journal Article |
Palavras-chave: EQUATION DE PENMAN-MONTEITH. |
| Ano: 2004 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0400031134102026&uri=/notices/prodinra1/2010/11/ |
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| Olioso, A.; Inoue, Y.; Ortega-Farias, S.; Demarty, J.; Wigneron, J.P.; Braud, I.; Jacob, F.; Lecharpentier, P.; Ottlé, C.; Calvet, J.C.; Brisson, N.. |
| Soil-Vegetation-Atmosphere Transfer Models (SVAT) and Crop Simulation Models describe physical and physiological processes occurring in crop canopies. Remote sensing data may be used through assimilation procedures for constraining or driving SVAT and crop models. These models provide continuous simulation of processes such as evapotranspiration and, thus, direct means for interpolating evapotranspiration between remote sensing data acquisitions (which is not the case for classical evapotranspiration mapping methods). They also give access to variables other than evapotranspiration, such as soil moisture and crop production. We developed the coupling between crop, SVAT and radiative transfer models in order to implement assimilation procedures in various... |
| Tipo: Journal Article |
Palavras-chave: ASSIMILATION DE DONNÉES; SIMULATION DE CULTURE; HUMIDITÉ ASSIMILATION OF DATA INTO MODELS; CROP SIMULATION MODEL; EVAPOTRANSPIRATION; IRRIGATION; REMOTE SENSING; SOIL; VEGETATION; ATMOSPHERE TRANSFER MODEL. |
| Ano: 2005 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0600036125111436&uri=/notices/prodinra1/2010/11/ |
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| Ortega-Farias, S.; Carrasco, M.; Olioso, A.; Acevedo, C.; Poblete, C.. |
| The Shuttleworth and Wallace model (SW) was evaluated to estimate latent heat flux above a drip-irrigated Cabernet Sauvignon vineyard, located in the Pencahue Valley, Region del Maule, Chile (35°22′ LS; 71°47′ LW; 150 m above sea level). The performance of the WS model (LEws) was evaluated against the eddy-covariance method (LEed) on a 30 min time interval. Results indicate that the root mean square error (RMSE) and mean absolute error (MAE) were 29 W m−2 and 22 W m−2, respectively. For the vine evapotranspiration (ETv), RMSE was 0.42 mm day−1 and MAE was 0.36 mm day−1. The largest disagreements between LEed and LEws were observed under dry atmospheric conditions. Also, the sensitivity analysis indicates that predicted ETv by the SW model was sensitive to... |
| Tipo: Journal Article |
Palavras-chave: MODÈLE SW. |
| Ano: 2007 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007f2bed6a4&uri=/notices/prodinra1/2010/11/ |
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