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	Provedor de dados REA (1) Rev. Bras. Ciênc. Solo (1) Autor Fernandes,André L. T. (1) Melo,Giovani L. de (1) Pinheiro,Everton Alves Rodrigues (1) van Lier,Quirijn de Jong (1) Palavra-chave Empirical equations (2) Climatic elements (1) FAO Penman-Monteith (1) Irrigation (1) Soil physics (1) Soil water retention (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2018 (1) 2012 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Evaluation of empirical methods to estimate reference evapotranspiration in Uberaba, State of Minas Gerais, Brazil REA Melo,Giovani L. de; Fernandes,André L. T.. Evapotranspiration is the process of water loss of vegetated soil due to evaporation and transpiration, and it may be estimated by various empirical methods. This study had the objective to carry out the evaluation of the performance of the following methods: Blaney-Criddle, Jensen-Haise, Linacre, Solar Radiation, Hargreaves-Samani, Makkink, Thornthwaite, Camargo, Priestley-Taylor and Original Penman in the estimation of the potential evapotranspiration when compared to the Penman-Monteith standard method (FAO56) to the climatic conditions of Uberaba, state of Minas Gerais, Brazil. A set of 21 years monthly data (1990 to 2010) was used, working with the climatic elements: temperature, relative humidity, wind speed and insolation. The empirical methods to... Tipo: Info:eu-repo/semantics/article Palavras-chave: Climatic elements; Empirical equations; FAO Penman-Monteith; Irrigation. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000500007 An Alert Regarding a Common Misinterpretation of the Van Genuchten α Parameter Rev. Bras. Ciênc. Solo van Lier,Quirijn de Jong; Pinheiro,Everton Alves Rodrigues. ABSTRACT Among the equations available to describe the relation between matric potential and soil water content, the soil water retention function, the most commonly used is the equation proposed by Van Genuchten in his 1980 landmark paper. In soil physics literature, especially in Brazil, several authors relate the inverse of the Van Genuchten parameter α to the air-entry pressure. This study aimed to show this common interpretation to be erroneous, as 1/α corresponds to water contents lower than saturation. The deviation depends on the m parameter. In fact, α is merely a scaling parameter relative to the matric potential axis. Recognizing this mathematical fact may improve the interpretation of soil hydraulic properties based on water retention parameters. Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil water retention; Soil physics; Empirical equations. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100415 Registros recuperados: 2 Primeira ... 1 ... Última

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