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Registro Completo |
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
19/11/1997 |
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Data da última atualização: |
04/01/2019 |
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Autoria: |
COELHO, E. F.; OR, D. |
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Afiliação: |
EMBRAPA-CPAMN. |
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Título: |
Applicability of analytica solutions for flow from point sources to drip irrigation management. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Soil Science Society of America Journal, v. 61, n. 5, p. 1331-1341, 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
The design and management of drip irrigation systems requires understanding of water distribution and dynamics within the wetted soil volume. The information can be obtained by means of analytical or numerical solutions of the multidimensional Richards equation. Though steady-state sulutions have bean advocated as design tools for drip irrigation, very little information about their performance under practical field conditions is available. The objective of this study was to evaluate the applicability of analytical solutions for steady and transient flows from point sources to practical drip irrigation management. The emphasis was the adaptive and dynamic aspects of managemente vs. conservative disegn considerations. Experiments were carried out in containers and in the field to determine steady-state attainment rates and to provide information on spatial and temporal dynamics of water content and matric potential during irrigationcycles. The main results were:(i) analytical solutions for steady and transient flow conditions predicted reasonably well measured distributions of water content and matric potential in the absence of plants; (ii) steady flow conditions were seldom realized under practical drip irrigation; (iii) transient flow solutions provided a more realistic description of soil water dynamics; and (iv) introducing uptake termsinto transient analytical solutions provided a simple and effective framework for capturing soil water dynamics in the presence of plant roots. MenosThe design and management of drip irrigation systems requires understanding of water distribution and dynamics within the wetted soil volume. The information can be obtained by means of analytical or numerical solutions of the multidimensional Richards equation. Though steady-state sulutions have bean advocated as design tools for drip irrigation, very little information about their performance under practical field conditions is available. The objective of this study was to evaluate the applicability of analytical solutions for steady and transient flows from point sources to practical drip irrigation management. The emphasis was the adaptive and dynamic aspects of managemente vs. conservative disegn considerations. Experiments were carried out in containers and in the field to determine steady-state attainment rates and to provide information on spatial and temporal dynamics of water content and matric potential during irrigationcycles. The main results were:(i) analytical solutions for steady and transient flow conditions predicted reasonably well measured distributions of water content and matric potential in the absence of plants; (ii) steady flow conditions were seldom realized under practical drip irrigation; (iii) transient flow solutions provided a more realistic description of soil water dynamics; and (iv) introducing uptake termsinto transient analytical solutions provided a simple and effective framework for capturing soil water dynamics in the presence of plant... Mostrar Tudo |
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Palavras-Chave: |
Analytical solution; Drip irrigation; Gotejamento; Point source; Ponto forte; Solucao analitica. |
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Thesagro: |
Irrigação. |
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Thesaurus Nal: |
irrigation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02163naa a2200229 a 4500
001 1050690
005 2019-01-04
008 1997 bl uuuu u00u1 u #d
100 1 $aCOELHO, E. F.
245 $aApplicability of analytica solutions for flow from point sources to drip irrigation management.
260 $c1997
520 $aThe design and management of drip irrigation systems requires understanding of water distribution and dynamics within the wetted soil volume. The information can be obtained by means of analytical or numerical solutions of the multidimensional Richards equation. Though steady-state sulutions have bean advocated as design tools for drip irrigation, very little information about their performance under practical field conditions is available. The objective of this study was to evaluate the applicability of analytical solutions for steady and transient flows from point sources to practical drip irrigation management. The emphasis was the adaptive and dynamic aspects of managemente vs. conservative disegn considerations. Experiments were carried out in containers and in the field to determine steady-state attainment rates and to provide information on spatial and temporal dynamics of water content and matric potential during irrigationcycles. The main results were:(i) analytical solutions for steady and transient flow conditions predicted reasonably well measured distributions of water content and matric potential in the absence of plants; (ii) steady flow conditions were seldom realized under practical drip irrigation; (iii) transient flow solutions provided a more realistic description of soil water dynamics; and (iv) introducing uptake termsinto transient analytical solutions provided a simple and effective framework for capturing soil water dynamics in the presence of plant roots.
650 $airrigation
650 $aIrrigação
653 $aAnalytical solution
653 $aDrip irrigation
653 $aGotejamento
653 $aPoint source
653 $aPonto forte
653 $aSolucao analitica
700 1 $aOR, D.
773 $tSoil Science Society of America Journal$gv. 61, n. 5, p. 1331-1341, 1997.
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Embrapa Meio-Norte (CPAMN) |
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| Registros recuperados : 10 | |
| 6. |  | COELHO, E. F.; OR, D.; SOUSA, V. F. de. Aspectos básicos em fertirrigação. In: SOUSA, V. F. de; MAROUELLI, W. A.; COELHO, E. F.; PINTO, J. M.; COELHO FILHO, M. A. (Ed.). Irrigação e fertirrigação em fruteiras e hortaliças. Brasília, DF: Embrapa Informação Tecnológica, 2011. Cap. 6, p. 235-251.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Cocais; Embrapa Mandioca e Fruticultura. |
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| Registros recuperados : 10 | |
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