methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, brazil
métodos de estimativa da evapotranspiração de referência para as condições do semi árido nordestino

Clicks: 189
ID: 227691
2011
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Popular

Ranked #114 of 225 articles by views in frontiers in neuroendocrinology

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 225 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
The objective of this work was to evaluate methods of estimation of reference crop evapotranspiration (ETo) in conditions of low and high air relative humidity, using the Penman Monteith-FAO 56 method as reference. Data from the period between January 2002 and June 2008 were obtained from a conventional meteorological station at Semiarid Federal Rural University, in Mossoró, RN, Brazil. Evaluation of methods was made by means of the precision index “r”, accuracy “d”, and of confidence or performance “c”. Methods Kimberly-Penman 1982, Kimberly-Penman 1972, Benevides-Lopez 1970 and Hargreaves-Samani 1985 obtained an important improvement in their performance when high air relative humidity conditions were considered (UR > 70%), compared to low air relative humidity conditions (UR < 70%). Equations of Makkink 1957 and Hamon 1961 underestimated ETo in both periods, and the method Penman modified-FAO24 showed tendency to overestimate the reference method. Methods Penman 1948, FAO24-Radiation, FAO24-Blaney-Criddle and Frere-Popov presented the higher performance among the evaluated methods.

O objetivo deste trabalho foi avaliar métodos de estimativa da evapotranspiração de referência (ETo) em condições de baixa e elevada umidade relativa usando o método de Penman Monteith-FAO 56 como referência. Foram utilizados dados de uma estação meteorológica convencional pertencente à Universidade Federal Rural do Semiárido, em Mossoró-RN referentes ao período de janeiro de 2002 a junho de 2008. A avaliação do desempenho foi realizada por meio do índice de precisão “r”, um índice de exatidão “d”, e de confiança ou desempenho “c”. Os métodos Kimberly-Penman 1982, Kimberly-Penman 1972, Benevides-Lopez 1970 e Hargreaves-Samani 1985 tiveram um aumento substancial nos seus desempenhos quando utilizados em condições de elevada umidade (UR > 70%), em comparação com as condições de baixa umidade (UR < 70%). As equações de Makkink 1957 e Hamon 1961 subestimaram a ETo em ambos os períodos e o método Penman modificado-FAO24 tendeu a superestimar o método padrão. Os métodos Penman 1948, FAO24-Radiação, FAO24-Blaney-Criddle e Frere-Popov apresentaram melhor desempenho entre os avaliados.

Reference Key
almeida2011semina:methods Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Bruno Marçal de Almeida;Alexsandra Duarte Oliveira;Edmilson Gomes Cavalcante Junior;José Espínola Sobrinho
Journal frontiers in neuroendocrinology
Year 2011
DOI
10.5433/1679-0359.2011v32n4Sup1p1699
URL
http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/4801
Keywords
Agriculture (General)

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.