Determinação da evapotranspiração de referência no perímetro irrigado Platô de Neópolis visando a otimização do uso da água e dos recursos energéticos.

Abstract

The present work had as objective determines the reference evapotranspiration in the perimeter irrigated Platô de Neópolis through the use of meteorological information obtained in the conventional station of INMET - Instituto Nacional de Meteorologia, located in the city of Propriá/SE, through the method of Penman-Montheith, considered standard and recommended by FAO. Also she proceeded to the evaluation and calibration of indirect methods (Penman 63, Corrected FAO-Penman, FAO-radiation, FAO-Blaney-Criddle and Hargreaves and Samani), for determination of the evapotranspirometrical demand, when it is not had the measurement of all the meteorological variables involved in the standard method. The minimum value of the estimate of the evapotranspiration demand for the method of Penman-Montheith was of 2,8 mm and the maximum was of 6,2 mm. The method of Penman - 63 were considered the best method of estimate of ETo when compared with the method standard.