ISHS Acta Horticulturae 792: V International Symposium on Irrigation of Horticultural Crops
EVALUATION OF THE SHUTTLEWORTH AND WALLACE MODEL TO ESTIMATE LATENT HEAT FLUX OVER A VINEYARD |
| Authors: | S. Ortega-Farias, M. Carrasco, C. Poblete, C. Acevedo, A. Olioso |
| Keywords: | evapotranspiration, grapevine, net radiation, soil heat flux |
| DOI: | 10.17660/ActaHortic.2008.792.58 |
| Abstract:
The Shuttleworth and Wallace (SW) model was evaluated to estimate latent heat flux (LE) from a drip-irrigated Cabernet Sauvignon vineyard, located in the Pencahue Valley, Region del Maule, Chile (35°22′ S, 71°47′ W, 150 m above sea level). The performance of the SW model was evaluated using the eddy-covariance method (LEed) on a 30 minute time interval. Sub-models to estimate net radiation (Rn) and soil heat flux (G) were used in the SW model. A good agreement between observed and estimated values of Rn were found with an overall standard error of estimate (SEE) of 40 W m-2 and the absolute relative error (ARE) of 3.1%. Results indicate that the SW model was able to predict LE with SEE and ARE values of 32 W m-2 and 8.8%, respectively. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
