Estimativa da evapotranspiração de referência pelo software REF-ET com base em dados médios obtidos no período de 1974 a 1978 (Pentecoste - Ceará).

Abstract

The software REF-ET realease 2.1 was applied to estimate the reference evapotranspiration, through of the eight methods, using set of datum average daily from 1974 to 1978 (ETr in Pentecoste-CE). The method of the Penman-Monteith, was used as the standard for evaluating the others approaches. The results show that, the methods Penman Kimberly 1982, FAO-Penman and the FAO-Blaney Criddle, best estimate the Penman-Monteith ETr values. The Class “A” Pan approach results in the highest deviation of ETr values