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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba; Embrapa Semiárido. |
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Data corrente: |
03/11/1993 |
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Data da última atualização: |
14/11/2011 |
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Autoria: |
PORTO, E. R. |
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Título: |
Method for estimating water requirements in Brazil with minimum data. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
Logan: Utah State University, 1977. |
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Páginas: |
109p. |
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Idioma: |
Inglês |
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Notas: |
Tese Mestrado. |
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Conteúdo: |
The following developments were included in the present study: 1. A correlation analysis was made of ETP calculated using the Hargreaves equation and latitude, longitude, and elevation for 58 stations in Brazil. 2. With this information, empirical formulas were developed for estimating evapotranspiration in different areas of Brazil by using only latitude, longitude, elevation, or combinations of these parameters. 3. Determinations were made of the influence of the length of record on the reliability of monthly mean values of precipitation. The results of the comparison between the empirical equations developed in this study and Hargreaves' equation indicated reasonable agreement. The greater deviations were observed when the number of stations used in developing the equations increased. For Brazil, the use of the empirical equations is recommended when approximation of evapotranspiration with errors up to 20 percent are acceptable. This statement assumes that ETP values computed using Hargreaves' equation are correct for Brazil. Temperature presented the highest coefficient of determination (r2). A comparison between measured temperature and temperature calculated with empirical equations developed during the correlation analysis showed that the maximum deviation observed in any zone was 1,8 graus C. This indicates that average monthly temperature can be easily predicted in any part of Brazil. ... |
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Palavras-Chave: |
Brasil; Data; Evapotraspiration; Exigencia; Influencia; Method; Methods; Requirement; Requirements. |
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Thesagro: |
Água; Clima; Dado; Estimativa; Evapotranspiração; Irrigação; Método. |
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Thesaurus Nal: |
Brazil; climate; estimation; irrigation; water. |
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Categoria do assunto: |
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X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02319nam a2200385 a 4500
001 1076284
005 2011-11-14
008 1977 bl uuuu m 00u1 u #d
100 1 $aPORTO, E. R.
245 $aMethod for estimating water requirements in Brazil with minimum data.
260 $aLogan: Utah State University$c1977
300 $a109p.
500 $aTese Mestrado.
520 $aThe following developments were included in the present study: 1. A correlation analysis was made of ETP calculated using the Hargreaves equation and latitude, longitude, and elevation for 58 stations in Brazil. 2. With this information, empirical formulas were developed for estimating evapotranspiration in different areas of Brazil by using only latitude, longitude, elevation, or combinations of these parameters. 3. Determinations were made of the influence of the length of record on the reliability of monthly mean values of precipitation. The results of the comparison between the empirical equations developed in this study and Hargreaves' equation indicated reasonable agreement. The greater deviations were observed when the number of stations used in developing the equations increased. For Brazil, the use of the empirical equations is recommended when approximation of evapotranspiration with errors up to 20 percent are acceptable. This statement assumes that ETP values computed using Hargreaves' equation are correct for Brazil. Temperature presented the highest coefficient of determination (r2). A comparison between measured temperature and temperature calculated with empirical equations developed during the correlation analysis showed that the maximum deviation observed in any zone was 1,8 graus C. This indicates that average monthly temperature can be easily predicted in any part of Brazil. ...
650 $aBrazil
650 $aclimate
650 $aestimation
650 $airrigation
650 $awater
650 $aÁgua
650 $aClima
650 $aDado
650 $aEstimativa
650 $aEvapotranspiração
650 $aIrrigação
650 $aMétodo
653 $aBrasil
653 $aData
653 $aEvapotraspiration
653 $aExigencia
653 $aInfluencia
653 $aMethod
653 $aMethods
653 $aRequirement
653 $aRequirements
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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| Registros recuperados : 177 | |
| 2. |  | PORTO, E. R. Envolvimento com comunidade: a busca de um caminho. In: SPITZ, A.; PEITER, G. (Coord.). Construindo a cidadania em comunidades de baixa renda: da ideia a acao. Rio de Janeiro: Oficina Social, Centro de Tecnologia, Trabalho e Cidadania, 2001. p. 7-9. (Cadernos da oficina social, 6)| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Semiárido. |
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| Registros recuperados : 177 | |
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