Relaciones agua-suelo-vegetación.-Influence of soil moisture on the modelling of evapotranspiration in sparse vegetation

Sánchez Navarro, Antonio; Fernández-Delgado Juárez, M.; Gil Vázquez, J.M.; García González, M.; Blanco Bernardeau, M.A.

Publication:
Relaciones agua-suelo-vegetación.-Influence of soil moisture on the modelling of evapotranspiration in sparse vegetation

dc.contributor.author	Sánchez Navarro, Antonio
dc.contributor.author	Fernández-Delgado Juárez, M.
dc.contributor.author	Gil Vázquez, J.M.
dc.contributor.author	García González, M.
dc.contributor.author	Blanco Bernardeau, M.A.
dc.contributor.other	Universidad de Murcia	es
dc.date.accessioned	2020-10-29T09:51:11Z
dc.date.available	2020-10-29T09:51:11Z
dc.date.created	2009-09
dc.description.abstract	ABSTRACT This work analyses the relevance of soil water content (θ) on the estimation of actual evapotranspiration (λE) in sparse vegetated areas. This importance is evaluated through the effect of the θ heterogeneity, both vertical and horizontal (differentiating between bare soil (bs) and soil under vegetation (s)), on λE estimates. A clumped evapotranspiration model (CM) that considers vegetation (p), bs and s as sources of evaporation, was used. This model estimates λE of the whole vegetated area, as well as the contribution of each source. The field site is a sparse-vegetated patch of Anthyllis cytisoides (L.) located in the instrumental area of Rambla Honda in Tabernas (Almería), run by the Arid Zones Experimental Station (CSIC). Values of θ measured at three depths (0.02 m, 0.05 m and 0.15 m) and the averaged for the whole 0.15 m soil profile were used to calculate parametric equations of surface soil resistances bs rs and s rs and the surface leaf conductance ls g . The parametric equations were introduced in the CM and the λE estimates obtained were compared with measured values from an Eddy covariance system. Results showed that θ has an important effect on the estimates of bs and s contributions. The modelled λE that provided the best results were obtained when bs rs and s rs were parameterised with θ measured at the surface at 0.02 m (RMSE = 0.2 mm day-1), while the worst estimates were obtained when using θ measured deeper (RMSE = 0.75 mm day-1).	es
dc.format	application/pdf	es
dc.format.extent	4	es
dc.identifier.uri	http://hdl.handle.net/10201/97827
dc.language	eng	es
dc.relation	Sin financiación externa a la Universidad de Murcia	es
dc.relation.ispartof	Congreso Internacional sobre desertificación	es
dc.rights	info:eu-repo/semantics/openAccess	es
dc.rights	Attribution-NonCommercial-NoDerivatives 4.0 International	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/	*
dc.subject	Clumped model	es
dc.subject	surface resistances parameterization	es
dc.subject	soil water content	es
dc.subject.other	CDU::5 - Ciencias puras y naturales::55 - Geología. Meteorología	es
dc.title	Relaciones agua-suelo-vegetación.-Influence of soil moisture on the modelling of evapotranspiration in sparse vegetation	es
dc.type	info:eu-repo/semantics/other	es
dspace.entity.type	Publication	es

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