Modelling interception loss from evergreen oak Mediterranean savannas: Application of a tree-based modelling approach
Type
article
Identifier
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
10.1016/j.agrformet.2008.10.014
Title
Modelling interception loss from evergreen oak Mediterranean savannas: Application of a tree-based modelling approach
Subject
Rainfall interception
Rainfall interception
Isolated trees
Savannas
Quercus ilex
Wet bulb temperature
Gash analytical model
Rainfall interception
Isolated trees
Savannas
Quercus ilex
Wet bulb temperature
Gash analytical model
Relation
This study was supported by research project SAPIENS/FCT No. POCTI/AGG/ 39220/2001 funded by the Fundação para a Ciência e Tecnologia. Funding was also provided by the Conselho de Reitores das Universidades Portuguesas and the British Council under the Treaty of Windsor Programme 2007/08-U27.
Date
2022-02-01T11:18:31Z
2022-02-01T11:18:31Z
2009
2022-02-01T11:18:31Z
2009
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.
info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/publishedVersion
Access restrictions
restrictedAccess
Language
eng
Comments