Comparação de métodos empírico-teóricos de estimativa de evapotranspiração de referência ao modelo de Penman- Monteith

• Ano de defesa: 2017
• Autor(a) principal: Silva, Sérgio Soares da
• Orientador(a): Soares, Alexandre Kepler
• Banca de defesa: Soares, Alexandre Kepler, Souza, Saulo Bruno Silveira e, Formiga, Klebber Teodomiro Martins
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Programa de Pós-graduação em Engenharia Ambiental e Sanitária (EEC)
• Departamento: Escola de Engenharia Civil - EEC (RG)
• País: Brasil
• Palavras-chave em Português: Calibração; Blaney-Criddle; Hargreaves-Samani; Penman-Monteith; Thornthwaite
• Palavras-chave em Inglês: Calibration; Blaney-Criddle; Hargreaves-Samani; Penman-Monteith; Thornthwaite
• Área do conhecimento CNPq: ENGENHARIA SANITARIA::SANEAMENTO AMBIENTAL
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/7915

The reference evapotranspiration is a fundamental parameter in the calculation of the water balance of watersheds or region as well as in determining the actual evapotranspiration of a crop or vegetation. This climatic parameter also serves as a basis for the determination of the volume and moment of irrigation of a crop. The objective of this research was on daily and monthly basis to evaluate the performance and perform the calibration methods of Hargreaves-Samani, Blaney-Criddle and Thornthwaite original and modified. The verification of performance of the models, both in their original and calibrated forms, was by comparison to the Penman-Monteith FAO 56 method. To evaluate the performance of the methods were used the correlation coefficient (r), the index of agreement (d), the confidence index (c), the mean absolute error (MAE), the mean square error (MSE), the mean square root error (RMSE), the maximum error (ME) and the coefficient of determination (R2). For this research, a series of data of ten years has been used from January 2007 to December 2016, and the first five years were used to evaluate and calibrate the methods and the last five years used to validate the adjusted methods. The meteorological data used come from a conventional station belonging to the National Institute of Meteorology (INMET), located in the southwest of the state of Goiás, more precisely in the city of Jataí-GO. The validation of calibration was performed only by the Hargreaves-Samani and Blaney-Criddle models, because they had the best adjustments over the standard Penman-Monteith FAO-56 method.