Estimation of Evapotranspiration Actual Using Sensor Aster and Model Metric

Document Type : Original Article

Authors

Abstract

In this study, a performance relatively new technique called the metric for estimating evapotranspiration actual (ETact) on Threeagricultural area located in the vicinity of synoptic stationsMashhad, Quchan and Golmkan has been studied. The purpose of satellite images Aster is used. Mapping evapotranspiration at high resolution with internalized calibration (METRIC) is a satellite-based image-processing model for calculating evapotranspiration (ET) as a residual of the surface energy balance. METRIC uses as its foundation the pioneering SEBAL energy balance process developed in The by Bastiaanssen. The surface energy balance is internally calibrated using ground-based reference ET to reduce computational biases inherent to remote sensing-based energy balance. According to the results, the maximum amount of evapotranspiration actual for the three ranges reserved Golmkan, Mashhad and Quchan 9/13, 7/29 and 2/37mm per day respectively. The results shows the model of energy balance metric for estimating evapotranspiration actual is the local scale suitable.

Keywords


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