Estimación de la evapotranspiración con fines de riego en tiempo real de un olivar a partir de imágenes de un drone en zonas áridas, caso La Yarada, Tacna, Perú

In the present study, remote sensing techniques are used using a Remotely Piloted Aircraft System (RPAS) to estimate crop evapotranspiration (ETc) in olive trees ( Olea europaea L. ) on the southern coast of Peru. The objective of the experiment was to estimate the evapotranspiration of the olive cultivation by means of the METRIC model, from multispectral and thermal images taken from an RPAS, after vicarious calibration with different types of bodies in the field and using spectroradiometer and portable radiometer. Mean values for ETc were obtained between 2.86 and 2.94 mm d –1 , 4.02 mm d –1 in winter (flowering) and 4.53 mm d –1 in summer (fruiting); and ETrF values, in the range of 0.88 to 1.67 and 0.92 to 1.42 mm d –1 for winter and summer respectively, with significant differences by season. Values above 1.0, with greater variability and slightly higher in winter, due to daily irrigation management throughout the year, to avoid abiotic stresses due to soil salinity.