Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/9065
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
isolated trees
Quercus ilex
wet bulb temperature
Gash analytical model
Data: 2009
Editora: Elsevier
Citação: "Agricultural and Forest Meteorology". ISSN 0168-1923. 149 (2009) 680-688
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/10400.5/9065
DOI: 10.1016/agrformet.2008.10.014
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