DETERMINATION OF THE EVAPOTRANSPIRATION BY DIFFERENT METHODS AND ITS APPLICATION IN THE DRYNESS INDEX IN THE CAMPANHA GAUCHA REGION, BRAZIL

作者：Brixner Gabriel Franke^*; Schoeffel Edgar Ricardo; Tonietto Jorge

来源：Revista Brasileira de Fruticultura, 2014, 36(4): 780-793.

DOI：10.1590/0100-2945-381/13

• Penman-Monteith
• empirical methods
• reference of evapotranspiration
• Geoviticulture Multicriteria Climatic Classification (MCC) System

The performance of the methods for estimating reference evapotranspiration (ETo) varies depending on the local climate. Therefore, this stud} aimed to: a) assess the performance of the indirect method of ETo estimation, on the daily and monthly scale, for the period from October to March, b) verify the quality of the methods for use in viticultural zoning studies for calculation of Dryness Index (DI), both having as standard method the Penman-Monteith-FAO. Daily meteorological data were used from October to March, in 1961 to 2010 period, from the network of meteorological stations FEPAGRO and INMET located in Campanha, RS. The evapotranspiration was calculated by the methods of Thomthwaitc, Camargo, Makkink, Solar Radiation, Jensen-Haise, Linacre, Hargreaves-Samani, Blaney-Criddle and Penman-Monteith, later determined the DI, comparing them with those obtained by Penman-Monteith. It was found on the daily scale that ETo showed differences in performance between the methods, varying the classification of "poorly" to "very good". On a monthly scale, methods that performed best had a performance rated as "good," for methods of Solar Radiation, Makkink, Blaney-Criddle and Camargo. For the dryness index in March, it turns out that the methods of Thomthwaite and Camargo showed great performance, being methodologies that can be adopted to estimate evapotranspiration for DI in the Geoviticulture Multicriteria Climatic Classification System for Campanha, RS.

• 出版日期2014-12