Aplica??o do algoritmo S-SEBI na obten??o da evapotranspira??o diária em condi??es áridas

摘要

The main objective of this study was to determine the daily actual evapotranspiration (ETr) of the tamarisk vegetation through micrometeorological and remote sensing techniques and to validate the results of ETr obtained by remote sensing. Micrometeorological data to obtain the daily ETr of the tamarisk vegetation in the Lower Colorado River, CA/USA provided by the Bowen ratio method, besides of the S-SEBI algorithm applied to TM Landsat-5 images were used. For obtaining the reference evapotranspiration (ET0) the weather station data were used and the FAO /Penman-Monteith method was applied. It was observed that the estimates of ETr by S-SEBI algorithm are similar to the measured values by the Bowen ratio method, as well as, that the identification of the vegetation dynamics through the spatial distribution of the evapotranspiration evidences the method applicability in obtaining the daily actual evapotranspiration.