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Titre :
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Estimation of the available energy for evapotranspiration with the use of remote sensing : a simple modelling approach
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Auteurs :
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P. Van Oevelen ;
W. Kustas ;
WAGENINGEN AGRICULTURAL UNIVERSITY NLD DEPARTMENT OF WATER RESOURCES ;
C. Daughtry ;
USDA-ARS HYDROLOGY LABORATORY BELTSVILLE USA ;
USDA-ARS REMOTE SENSING RESEARCH LABORATORY BELTSVILLE USA
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Type de document :
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article/chapitre/communication
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Année de publication :
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1993
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Format :
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p. 100-109
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Langues:
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= Anglais
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Catégories :
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TELEDETECTION
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Mots-clés:
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EVAPOTRANSPIRATION
;
ENERGIE
;
MODELISATION
;
TELEDETECTION
;
RAYONNEMENT SOLAIRE
;
TRANSFERT DE CHALEUR
;
MESURE
;
DONNEE DE SATELLITE
;
INDICE DE VEGETATION
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Résumé :
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The objective of this study was to test the feasibility of estimating the available energy for evapotranspiration, expressed as net radiation plus soil heat flux on a daily time step. For estimating daily net radiation, incorporating a vegetation index was only useful for days with mostly sunny skies and dry soil conditions. Thus, employing ground-based meteorological data and remote sensing data in a simple model can give reliable estimates of the daily and daytime total available energy. With satellite based sensors, it may be feasible to map this quantity over large areas.
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Source :
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EARseL advances in remote sensing, vol. 2, n° 2
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