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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
10/07/1997 |
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Data da última atualização: |
10/07/1997 |
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Autoria: |
COELHO, E. F.; OR, D. |
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Afiliação: |
EMBRAPA-CPAMN; Utah State University, Logan, UT. |
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Título: |
Semi-analytical model for soil water distribution in the wetted volumewith plant uptake |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Jaguariuna, SP: EMBRAPA-CNPMA, 1997 |
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Páginas: |
p.40-45 |
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Idioma: |
Português |
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Notas: |
In: WORKSHOP ON SPECIAL TOPICS ABOUT SOIL PHYSICS AND CROP MODELING AND SIMULATION, 1997, Piracicaba, SP. Anais... Jaguariuna, SP: 1997 |
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Conteúdo: |
Advances in drip irrigation management rely on knowledge of the distribution and dynamics of soil water within the wetted soil volume. Part of the information can be obtained from numerical or analytical models for water flow from point or lime sources. However, a more complete picture of soil water dynamics in cropped fields requires explicit consideration of plant water extraction patterns. In this study we propose to combine an analytical solution for transient flow from cyclic point sources representing drippers with a parametric model for uptake by plant roots. A point apppppproximation is proposed (for monitoring purposes) based on a localized water balance which considers changes in water content due to transient flow from the dripper coupled with plantuptake only from the soil volume under consideration. Comparisons with grenhouse measurements show very good agreement with the localized approximation for two-day irrigation intervals. The method offers reasonable mean to describe soil water dynamics within wetted soil volumes under cropped conditions for various irrigation management scenarios. |
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Palavras-Chave: |
Analytical models; Congresso; Drip; Gotejamento; Modelo analitico. |
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Thesagro: |
Água; Irrigação; Solo. |
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Thesaurus Nal: |
irrigation; soil; water. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01946naa a2200289 a 4500
001 1644887
005 1997-07-10
008 1997 bl uuuu u00u1 u #d
100 1 $aCOELHO, E. F.
245 $aSemi-analytical model for soil water distribution in the wetted volumewith plant uptake
260 $c1997
300 $ap.40-45
500 $aIn: WORKSHOP ON SPECIAL TOPICS ABOUT SOIL PHYSICS AND CROP MODELING AND SIMULATION, 1997, Piracicaba, SP. Anais... Jaguariuna, SP: 1997
520 $aAdvances in drip irrigation management rely on knowledge of the distribution and dynamics of soil water within the wetted soil volume. Part of the information can be obtained from numerical or analytical models for water flow from point or lime sources. However, a more complete picture of soil water dynamics in cropped fields requires explicit consideration of plant water extraction patterns. In this study we propose to combine an analytical solution for transient flow from cyclic point sources representing drippers with a parametric model for uptake by plant roots. A point apppppproximation is proposed (for monitoring purposes) based on a localized water balance which considers changes in water content due to transient flow from the dripper coupled with plantuptake only from the soil volume under consideration. Comparisons with grenhouse measurements show very good agreement with the localized approximation for two-day irrigation intervals. The method offers reasonable mean to describe soil water dynamics within wetted soil volumes under cropped conditions for various irrigation management scenarios.
650 $airrigation
650 $asoil
650 $awater
650 $aÁgua
650 $aIrrigação
650 $aSolo
653 $aAnalytical models
653 $aCongresso
653 $aDrip
653 $aGotejamento
653 $aModelo analitico
700 1 $aOR, D.
773 $tJaguariuna, SP: EMBRAPA-CNPMA, 1997
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Embrapa Mandioca e Fruticultura (CNPMF) |
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