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http://hdl.handle.net/10400.11/7874
Título: | Modelling interception loss from evergreen oak Mediterranean savannas: Application of a tree-based modelling approach |
Autor: | Pereira, F.L. Gash, J.H.C. David, J.S. David, T.S. Monteiro, P.R. Valente, F. |
Palavras-chave: | Rainfall interception Rainfall interception Isolated trees Savannas Quercus ilex Wet bulb temperature Gash analytical model |
Data: | 2009 |
Citação: | Pereira, F.L.; Gash, J.H.C.; David, J.S.; David, T.S.; Monteiro, P.R.; Valente, F., 2009. Modelling interception loss from evergreen oak Mediterranean savannas: Application of a tree-based modelling approach. Agricultural and Forest Meteorology, 149(3-4): 680-688. DOI: 10.1016/j.agrformet.2008.10.014 |
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. |
Peer review: | yes |
URI: | http://hdl.handle.net/10400.11/7874 |
DOI: | 10.1016/j.agrformet.2008.10.014 |
Aparece nas colecções: | ESACB - Artigos em revistas com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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PereiraFL_etal_2009_b.pdf | 512,73 kB | Adobe PDF | Ver/Abrir Acesso Restrito. Solicitar cópia ao autor! |
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