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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
04/07/2007 |
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Data da última atualização: |
20/10/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PARAIBA, L. C.; PULINO, P. |
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Afiliação: |
LOURIVAL COSTA PARAIBA, CNPMA; P. PULINO, IMECC-UNICAMP. |
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Título: |
Pesticide dispersion-advection equation with soil temperature effect. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Environmetrics, Sussex, v. 14, n. 3, p.323-337, 2003. |
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Idioma: |
Inglês |
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Conteúdo: |
A dispersion-advection equation, denoted as a DAPESTE model, of one-dimensional evolution to simulate pesticide leaching in soil with a sinusoidal function to describe the daily average soil temperature at different depths is presented. In numerical simulation, the finite element method (FEM) will be used for space semi-discretization and the regressive Eüler method (REM) for time discretization. It will be used as an FEM for dispersion-advection problems in which the advective transport predominates over the dispersive one. Let us suppose that the pesticide diffusivities in the gaseous and aqueous soil phases depend on the soil temperature. In this way, the effective hydrodynamic dispersion coefficient of the dispersion-advection equation will depend on the soil temperature. The pesticide air-water partition coefficient of the Henry law, varying with temperature, will be determined by the Clausius-Clapeyron equation. The van´t Hoff equation will be used to determine the temperature dependence of the pesticide soil sorption coefficient. The Arrhenius equation will be used to estimate the effect of the soil temperature on the pesticide degradation rate. These temperature dependence relationships can help comprehend the pesticide behavior in the soil under different scenarios of the soil temperatures, especially in pesticide concentration leaching and its half-life in soil. |
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Thesagro: |
Dispersão; Lixiviação; Pesticida; Solo; Sorção; Temperatura. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163811/1/Paraiba-Pesticide-6961.pdf
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Marc: |
LEADER 01949naa a2200205 a 4500
001 1015532
005 2017-10-20
008 2003 bl uuuu u00u1 u #d
100 1 $aPARAIBA, L. C.
245 $aPesticide dispersion-advection equation with soil temperature effect.$h[electronic resource]
260 $c2003
520 $aA dispersion-advection equation, denoted as a DAPESTE model, of one-dimensional evolution to simulate pesticide leaching in soil with a sinusoidal function to describe the daily average soil temperature at different depths is presented. In numerical simulation, the finite element method (FEM) will be used for space semi-discretization and the regressive Eüler method (REM) for time discretization. It will be used as an FEM for dispersion-advection problems in which the advective transport predominates over the dispersive one. Let us suppose that the pesticide diffusivities in the gaseous and aqueous soil phases depend on the soil temperature. In this way, the effective hydrodynamic dispersion coefficient of the dispersion-advection equation will depend on the soil temperature. The pesticide air-water partition coefficient of the Henry law, varying with temperature, will be determined by the Clausius-Clapeyron equation. The van´t Hoff equation will be used to determine the temperature dependence of the pesticide soil sorption coefficient. The Arrhenius equation will be used to estimate the effect of the soil temperature on the pesticide degradation rate. These temperature dependence relationships can help comprehend the pesticide behavior in the soil under different scenarios of the soil temperatures, especially in pesticide concentration leaching and its half-life in soil.
650 $aDispersão
650 $aLixiviação
650 $aPesticida
650 $aSolo
650 $aSorção
650 $aTemperatura
700 1 $aPULINO, P.
773 $tEnvironmetrics, Sussex$gv. 14, n. 3, p.323-337, 2003.
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Embrapa Meio Ambiente (CNPMA) |
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