Estimation of actual evapotranspiration by numerical modelling of water flow in the unsaturated zone

Autores
Guarracino, Luis; Cesanelli, Andrés
Año de publicación
2007
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The objective of this paper is to present a model to estimate actual evapotranspiration ETA from reference evapotranspiration ET0 by numerical modelling of water flow in the unsaturated zone of the soil. Water flow is described by the highly non-linear Richards equation with a sink term representing the root water uptake. Evaporation is included in the model as a Neumann boundary condition at the soil surface. Richards equation is solved in a one-dimensional domain using a mixed finite element method. The values of ETA are obtained by applying a water stress factor to ET0 to account for soil moisture changes during simulation period. The proposed numerical model is used to estimate ETA in an experimental plot located in a flatland area in Buenos Aires (Argentina). Numerical results show that the proposed model is a useful tool for evaluating evapotranspiration under different scenarios.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Geofísica
Recursos Hídricos
evapotranspiración
Aguas Subterráneas
zona no saturada
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nd/2.5/ar/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/26558
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/26558
network_acronym_str SEDICI
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network_name_str SEDICI (UNLP)
spelling Estimation of actual evapotranspiration by numerical modelling of water flow in the unsaturated zoneGuarracino, LuisCesanelli, AndrésGeofísicaRecursos HídricosevapotranspiraciónAguas Subterráneaszona no saturadaThe objective of this paper is to present a model to estimate actual evapotranspiration ETA from reference evapotranspiration ET0 by numerical modelling of water flow in the unsaturated zone of the soil. Water flow is described by the highly non-linear Richards equation with a sink term representing the root water uptake. Evaporation is included in the model as a Neumann boundary condition at the soil surface. Richards equation is solved in a one-dimensional domain using a mixed finite element method. The values of ETA are obtained by applying a water stress factor to ET0 to account for soil moisture changes during simulation period. The proposed numerical model is used to estimate ETA in an experimental plot located in a flatland area in Buenos Aires (Argentina). Numerical results show that the proposed model is a useful tool for evaluating evapotranspiration under different scenarios.Facultad de Ciencias Astronómicas y Geofísicas2007-09-17info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionObjeto de conferenciahttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/26558enginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nd/2.5/ar/Creative Commons Attribution-NoDerivs 2.5 Argentina (CC BY-ND 2.5)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T10:29:20Zoai:sedici.unlp.edu.ar:10915/26558Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:29:20.975SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Estimation of actual evapotranspiration by numerical modelling of water flow in the unsaturated zone
title Estimation of actual evapotranspiration by numerical modelling of water flow in the unsaturated zone
spellingShingle Estimation of actual evapotranspiration by numerical modelling of water flow in the unsaturated zone
Guarracino, Luis
Geofísica
Recursos Hídricos
evapotranspiración
Aguas Subterráneas
zona no saturada
title_short Estimation of actual evapotranspiration by numerical modelling of water flow in the unsaturated zone
title_full Estimation of actual evapotranspiration by numerical modelling of water flow in the unsaturated zone
title_fullStr Estimation of actual evapotranspiration by numerical modelling of water flow in the unsaturated zone
title_full_unstemmed Estimation of actual evapotranspiration by numerical modelling of water flow in the unsaturated zone
title_sort Estimation of actual evapotranspiration by numerical modelling of water flow in the unsaturated zone
dc.creator.none.fl_str_mv Guarracino, Luis
Cesanelli, Andrés
author Guarracino, Luis
author_facet Guarracino, Luis
Cesanelli, Andrés
author_role author
author2 Cesanelli, Andrés
author2_role author
dc.subject.none.fl_str_mv Geofísica
Recursos Hídricos
evapotranspiración
Aguas Subterráneas
zona no saturada
topic Geofísica
Recursos Hídricos
evapotranspiración
Aguas Subterráneas
zona no saturada
dc.description.none.fl_txt_mv The objective of this paper is to present a model to estimate actual evapotranspiration ETA from reference evapotranspiration ET0 by numerical modelling of water flow in the unsaturated zone of the soil. Water flow is described by the highly non-linear Richards equation with a sink term representing the root water uptake. Evaporation is included in the model as a Neumann boundary condition at the soil surface. Richards equation is solved in a one-dimensional domain using a mixed finite element method. The values of ETA are obtained by applying a water stress factor to ET0 to account for soil moisture changes during simulation period. The proposed numerical model is used to estimate ETA in an experimental plot located in a flatland area in Buenos Aires (Argentina). Numerical results show that the proposed model is a useful tool for evaluating evapotranspiration under different scenarios.
Facultad de Ciencias Astronómicas y Geofísicas
description The objective of this paper is to present a model to estimate actual evapotranspiration ETA from reference evapotranspiration ET0 by numerical modelling of water flow in the unsaturated zone of the soil. Water flow is described by the highly non-linear Richards equation with a sink term representing the root water uptake. Evaporation is included in the model as a Neumann boundary condition at the soil surface. Richards equation is solved in a one-dimensional domain using a mixed finite element method. The values of ETA are obtained by applying a water stress factor to ET0 to account for soil moisture changes during simulation period. The proposed numerical model is used to estimate ETA in an experimental plot located in a flatland area in Buenos Aires (Argentina). Numerical results show that the proposed model is a useful tool for evaluating evapotranspiration under different scenarios.
publishDate 2007
dc.date.none.fl_str_mv 2007-09-17
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
info:eu-repo/semantics/publishedVersion
Objeto de conferencia
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
format conferenceObject
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/26558
url http://sedici.unlp.edu.ar/handle/10915/26558
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nd/2.5/ar/
Creative Commons Attribution-NoDerivs 2.5 Argentina (CC BY-ND 2.5)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nd/2.5/ar/
Creative Commons Attribution-NoDerivs 2.5 Argentina (CC BY-ND 2.5)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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