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| Registros recuperados : 240 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
14/04/1999 |
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Data da última atualização: |
11/06/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ANDRADE, C. de L. T. de; WELLS, R. D.; ALLEN, R. G. |
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Afiliação: |
CAMILO DE LELIS TEIXEIRA DE ANDRADE, CNPMS. |
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Título: |
SPRINKMOD - pressure and discharge simulation model for pressurized irrigation systems. 2. Case study. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Irrigation Science, New York, v. 18, p. 149-156, 1999. |
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Idioma: |
Inglês |
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Conteúdo: |
A computer model, SPRINKMOD, was tested with field data collected from a complex sprinkler irrigation system in operation. The original data collected were adjusted in order to calibrate the model for the irrigation system. Five modifications were made in the original data so that the model sensitivity could be evaluated. The model predicted the system operating point with less than 1% error, after some adjustments in the data. The relative mean standard error was 4.1% for the upstream pressure heads and 2.1% for the downstream pressure heads of all laterals analyzed together. Measurement of pressure and discharge at pump stations along with a reasonable estimate of leakage appears to be essentials for simulation of old systems. Adjustments made to pipe wall thickness and pipe roughness were not as important as the adjustments made to the lateral valves closure in getting SPRINKMOD to simulate pressure heads that were close to the measured values. For long laterals, like center pivot laterals, a variable local loss coefficient for flow past a riser outlet worked better than a fixed value of 0,3. |
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Palavras-Chave: |
Avaliacao; Calibracao; Evaluation; Leakage; Model; Modelo; Simulation; Sprinker; Vazamento. |
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Thesagro: |
Aspersão; Irrigação; Simulação. |
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Thesaurus NAL: |
calibration; irrigation. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 01947naa a2200313 a 4500
001 1482096
005 2018-06-11
008 1999 bl uuuu u00u1 u #d
100 1 $aANDRADE, C. de L. T. de
245 $aSPRINKMOD - pressure and discharge simulation model for pressurized irrigation systems. 2. Case study.$h[electronic resource]
260 $c1999
520 $aA computer model, SPRINKMOD, was tested with field data collected from a complex sprinkler irrigation system in operation. The original data collected were adjusted in order to calibrate the model for the irrigation system. Five modifications were made in the original data so that the model sensitivity could be evaluated. The model predicted the system operating point with less than 1% error, after some adjustments in the data. The relative mean standard error was 4.1% for the upstream pressure heads and 2.1% for the downstream pressure heads of all laterals analyzed together. Measurement of pressure and discharge at pump stations along with a reasonable estimate of leakage appears to be essentials for simulation of old systems. Adjustments made to pipe wall thickness and pipe roughness were not as important as the adjustments made to the lateral valves closure in getting SPRINKMOD to simulate pressure heads that were close to the measured values. For long laterals, like center pivot laterals, a variable local loss coefficient for flow past a riser outlet worked better than a fixed value of 0,3.
650 $acalibration
650 $airrigation
650 $aAspersão
650 $aIrrigação
650 $aSimulação
653 $aAvaliacao
653 $aCalibracao
653 $aEvaluation
653 $aLeakage
653 $aModel
653 $aModelo
653 $aSimulation
653 $aSprinker
653 $aVazamento
700 1 $aWELLS, R. D.
700 1 $aALLEN, R. G.
773 $tIrrigation Science, New York$gv. 18, p. 149-156, 1999.
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