Estimation of real evapotranspiration (ETR) and potential evapotranspiration (ETP) in the southwest of the Buenos Aires Province (Argentina) using MODIS images


  • F. Marini INTA - Instituto Nacional de Tecnología Agropecuaria
  • M. Santamaría Universidad Nacional del Sur
  • P. Oricchio Instituto de Clima y Agua
  • C.M. Di Bella Instituto de Clima y Agua
  • A. Basualdo Oficina de Riesgo Agropecuario



real evapotranspiration, potential evapotranspiration, MODIS, surface temperature, NDVI


Using regression analysis between actual evapotranspiration (ETR) and potential evapotranspiration (ETP) values obtained in seven meteorological observatories and remote sensing derived data from MODIS images (Surface temperature and Normalized Difference Vegetation Index - NDVI) models for estimating ETR and ETP in the southwest of the Buenos Aires Province (Argentina) were developed for the 2000–2014 period. Both models were satisfactorily evaluated in the meteorological observatories used. A regression model was adjusted for ETR with a determination coefficient of 0,6959. Regression model was nonlinear in the case of the ETP variable with a determination coefficient of 0,8409. The individual regression analysis for each meteorological observatories explicate the behavior of the regression for the total data set of ETR and ETP. According to these results, the utility of remote sensing in determination of ETR and ETP in areas without meteorological data was confirmed.


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Author Biographies

F. Marini, INTA - Instituto Nacional de Tecnología Agropecuaria

Encargado del Laboratorio de Teledetección y Sig de la EEA Bordenave.

M. Santamaría, Universidad Nacional del Sur

Dpto. de Matemática

P. Oricchio, Instituto de Clima y Agua

Instituto de Clima y Agua, Nicolas Repetto y de los Reseros s/n,Hurlingham, Buenos Aires, Argentina

C.M. Di Bella, Instituto de Clima y Agua

Instituto de Clima y Agua, Nicolas Repetto y de los Reseros s/n,Hurlingham, Buenos Aires, Argentina


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