Journal of Environmental Hydrology
Electronic Journal of the International Association for Environmental Hydrology
JEH Volume 17 (2009), Paper 1 Posted January 16, 2009
SPATIAL DISTRIBUTION OF LATENT HEAT FLUX FROM LANDSAT (ETM+) IMAGES
2Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Argentina
This paper describes the methodology used for estimating the latent heat flux (LE) by means of the energy balance equation and using data from Landsat EMT+ images. The aim of the application is to assess the LE distribution in an agricultural region located in the center of Buenos Aires Province, Argentina. The methodology made use of two images captured in November and December 2001, which correspond to the period of greatest demand in terms of evaporation and transpiration. The results from the image processing are quite consistent as compared to a local-scale Penman-Monteith model. Moreover, the maps obtained show variations of up to 3 mm/day among neighboring plots, a fact that is not detected by the local-scale model.
Reference: Schirmbeck, J., R. Rivas, and E. Usunoff. 2009. Spatial distribution of latent heat flux from Landsat (ETM+) images. Journal of Environmental Hydrology, Vol. 17, Paper 1.
Instituto de Hidrología de Llanuras
Buenos Aires, Argentina
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