Modelling interception loss from evergreen oak Mediterranean savannas: application of a tree-based modelling approach
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.5/9065 |
Resumo: | In a previous study, it was shown that an isolated, fully saturated tree-crown behaves like a wet bulb, allowing evaporation of intercepted rainfall to be estimated by a simple diffusion equation for water vapour. This observation was taken as the basis for a new approach in modelling interception loss fromsavanna-type woodland, whereby the ecosystem evaporation is derived by scaling up the evaporation from individual trees, rather than by considering a homogeneous forest cover. Interception loss from isolated trees was estimated by combining the aforementioned equation for water vapour flux with Gash’s analytical model. A new methodology, which avoids the subjectivity inherent in the Leyton method, was used for estimating the crown storage capacity. Modelling performance was evaluated against data from two Mediterranean savanna-type oak woodlands (montados) in southern Portugal. Interception loss estimates were in good agreement with observations in both sites. The proposed modelling approach is physically based, requires only a limited amount of data and should be suitable for the modelling of interception loss in isolated trees and savannatype ecosystems |
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Modelling interception loss from evergreen oak Mediterranean savannas: application of a tree-based modelling approachrainfall interceptionisolated treessavannasQuercus ilexwet bulb temperatureGash analytical modelIn a previous study, it was shown that an isolated, fully saturated tree-crown behaves like a wet bulb, allowing evaporation of intercepted rainfall to be estimated by a simple diffusion equation for water vapour. This observation was taken as the basis for a new approach in modelling interception loss fromsavanna-type woodland, whereby the ecosystem evaporation is derived by scaling up the evaporation from individual trees, rather than by considering a homogeneous forest cover. Interception loss from isolated trees was estimated by combining the aforementioned equation for water vapour flux with Gash’s analytical model. A new methodology, which avoids the subjectivity inherent in the Leyton method, was used for estimating the crown storage capacity. Modelling performance was evaluated against data from two Mediterranean savanna-type oak woodlands (montados) in southern Portugal. Interception loss estimates were in good agreement with observations in both sites. The proposed modelling approach is physically based, requires only a limited amount of data and should be suitable for the modelling of interception loss in isolated trees and savannatype ecosystemsElsevierRepositório da Universidade de LisboaPereira, F.L.Gash, J.H.C.David, J.S.David, T.S.Monteiro, P.R.Valente, F.2015-07-24T14:35:24Z20092009-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/9065eng"Agricultural and Forest Meteorology". ISSN 0168-1923. 149 (2009) 680-68810.1016/agrformet.2008.10.014info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:39:35Zoai:www.repository.utl.pt:10400.5/9065Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:55:54.385516Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Modelling interception loss from evergreen oak Mediterranean savannas: application of a tree-based modelling approach |
title |
Modelling interception loss from evergreen oak Mediterranean savannas: application of a tree-based modelling approach |
spellingShingle |
Modelling interception loss from evergreen oak Mediterranean savannas: application of a tree-based modelling approach Pereira, F.L. rainfall interception isolated trees savannas Quercus ilex wet bulb temperature Gash analytical model |
title_short |
Modelling interception loss from evergreen oak Mediterranean savannas: application of a tree-based modelling approach |
title_full |
Modelling interception loss from evergreen oak Mediterranean savannas: application of a tree-based modelling approach |
title_fullStr |
Modelling interception loss from evergreen oak Mediterranean savannas: application of a tree-based modelling approach |
title_full_unstemmed |
Modelling interception loss from evergreen oak Mediterranean savannas: application of a tree-based modelling approach |
title_sort |
Modelling interception loss from evergreen oak Mediterranean savannas: application of a tree-based modelling approach |
author |
Pereira, F.L. |
author_facet |
Pereira, F.L. Gash, J.H.C. David, J.S. David, T.S. Monteiro, P.R. Valente, F. |
author_role |
author |
author2 |
Gash, J.H.C. David, J.S. David, T.S. Monteiro, P.R. Valente, F. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Pereira, F.L. Gash, J.H.C. David, J.S. David, T.S. Monteiro, P.R. Valente, F. |
dc.subject.por.fl_str_mv |
rainfall interception isolated trees savannas Quercus ilex wet bulb temperature Gash analytical model |
topic |
rainfall interception isolated trees savannas Quercus ilex wet bulb temperature Gash analytical model |
description |
In a previous study, it was shown that an isolated, fully saturated tree-crown behaves like a wet bulb, allowing evaporation of intercepted rainfall to be estimated by a simple diffusion equation for water vapour. This observation was taken as the basis for a new approach in modelling interception loss fromsavanna-type woodland, whereby the ecosystem evaporation is derived by scaling up the evaporation from individual trees, rather than by considering a homogeneous forest cover. Interception loss from isolated trees was estimated by combining the aforementioned equation for water vapour flux with Gash’s analytical model. A new methodology, which avoids the subjectivity inherent in the Leyton method, was used for estimating the crown storage capacity. Modelling performance was evaluated against data from two Mediterranean savanna-type oak woodlands (montados) in southern Portugal. Interception loss estimates were in good agreement with observations in both sites. The proposed modelling approach is physically based, requires only a limited amount of data and should be suitable for the modelling of interception loss in isolated trees and savannatype ecosystems |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009 2009-01-01T00:00:00Z 2015-07-24T14:35:24Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.5/9065 |
url |
http://hdl.handle.net/10400.5/9065 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Agricultural and Forest Meteorology". ISSN 0168-1923. 149 (2009) 680-688 10.1016/agrformet.2008.10.014 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799131041246478336 |