Pesticide dispersion-advection equation with soil temperature effect.
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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Format: | Artigo de periódico biblioteca |
Language: | English eng |
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2007-07-04
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Subjects: | Sorção, Temperatura, Pesticida, Lixiviação, Solo, Dispersão., |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/15532 |
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dig-alice-doc-155322017-09-19T00:13:35Z Pesticide dispersion-advection equation with soil temperature effect. PARAIBA, L. C. PULINO, P. LOURIVAL COSTA PARAIBA, CNPMA; P. PULINO, IMECC-UNICAMP. Sorção Temperatura Pesticida Lixiviação Solo Dispersão. 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. 2017-09-19T00:13:35Z 2017-09-19T00:13:35Z 2007-07-04 2003 2017-10-20T11:11:11Z Artigo de periódico Environmetrics, Sussex, v. 14, n. 3, p.323-337, 2003. http://www.alice.cnptia.embrapa.br/alice/handle/doc/15532 en eng openAccess |
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Sorção Temperatura Pesticida Lixiviação Solo Dispersão. Sorção Temperatura Pesticida Lixiviação Solo Dispersão. |
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Sorção Temperatura Pesticida Lixiviação Solo Dispersão. Sorção Temperatura Pesticida Lixiviação Solo Dispersão. PARAIBA, L. C. PULINO, P. Pesticide dispersion-advection equation with soil temperature effect. |
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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. |
author2 |
LOURIVAL COSTA PARAIBA, CNPMA; P. PULINO, IMECC-UNICAMP. |
author_facet |
LOURIVAL COSTA PARAIBA, CNPMA; P. PULINO, IMECC-UNICAMP. PARAIBA, L. C. PULINO, P. |
format |
Artigo de periódico |
topic_facet |
Sorção Temperatura Pesticida Lixiviação Solo Dispersão. |
author |
PARAIBA, L. C. PULINO, P. |
author_sort |
PARAIBA, L. C. |
title |
Pesticide dispersion-advection equation with soil temperature effect. |
title_short |
Pesticide dispersion-advection equation with soil temperature effect. |
title_full |
Pesticide dispersion-advection equation with soil temperature effect. |
title_fullStr |
Pesticide dispersion-advection equation with soil temperature effect. |
title_full_unstemmed |
Pesticide dispersion-advection equation with soil temperature effect. |
title_sort |
pesticide dispersion-advection equation with soil temperature effect. |
publishDate |
2007-07-04 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/15532 |
work_keys_str_mv |
AT paraibalc pesticidedispersionadvectionequationwithsoiltemperatureeffect AT pulinop pesticidedispersionadvectionequationwithsoiltemperatureeffect |
_version_ |
1756023760658366464 |