Estudo comparativo da estimativa da evapotranspiração de referência para três localidades no Estado do Espírito Santo / Study Comparative of the Estimate of Evapotranspiration of Reference for three places in Espírito Saint State.

AUTOR(ES)

Rosenbergue Bragança

DATA DE PUBLICAÇÃO

2007

RESUMO

The present work had as objective to accomplish a study of the empiric equations for estimate of the reference evapotranspiration in comparison with the standard method Penman-Monteith FAO 56 for the climatic conditions of the municipal districts of Sooretama, Cachoeiro of Itapemirim and New Sale of the Immigrant located, respectively, in the areas North, South and Highland of Espírito Saint State. The climatic variables were used regarding to the rainy period (October, November and December) of the year of 2005 and of the dry period (June, July and August) of the year of 2006, obtained through platform of data of CPTEC - coming INPE of the stations automated agrometeorological codes no. 31957, 31958 and 31959, respectively. To compare the values of dear ET0 through the empiric equations with the one of the standard method Penman-Monteith (FAO56) the parameters of the regression equation were considered (ß0, ß1), determination xviii coefficient (r), correlation coefficient (r), estimate of the standard mistake (EEP), agreement index (d), trust index or acting (c), in the scales daily rate, three, five seven days, for the months studied at the three places. Basing on the climatic conditions from where the work took place and in the indexes and obtained parameters, so much in the rainy period (October, November and December of 2005) as in the dry (June, July and August of 2006), the best methods were: i) Penman (48) Original (medium c = 0,94), FAO24 Penman Mod. (medium c = 0,93), FAO24 BC (medium c = 0,95), classifying them with Great acting, ii) Priestley-Taylor (PT) (medium c = 0,90), Turc(61) (medium c = 0,88) and Makkink (Mk) (medium c = 0,88), classifying them with acting Good acting, and iii) coming as worse method the one of Hargreaves-Samani (HS) (medium c = 0,45), classifying it with Bearable acting.

ASSUNTO(S)

irrigation clima climate irrigacao e drenagem evapotranspiration variáveis climáticas evapotranspiração de referência evapotranspiração reference evapotranspiration climatic variables equações empíricas irrigação empiric equations

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