Centre de documentation
scientifique

Dépouillements

Estimation of regional evapotranspiration by TM/ETM+ data over heterogeneous surfaces / S. Liu in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 10 (October 2007)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 10 (October 2007) . - pp 1169 - 1178 Titre : Estimation of regional evapotranspiration by TM/ETM+ data over heterogeneous surfaces Type de document : Article/Communication Auteurs : S. Liu, Auteur ; G. Hu, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 1169 - 1178 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse diachronique [Termes IGN] bilan hydrique [Termes IGN] données météorologiques [Termes IGN] estimation quantitative [Termes IGN] évapotranspiration [Termes IGN] image Landsat-ETM+ [Termes IGN] image Landsat-TM [Termes IGN] Pékin (Chine) [Termes IGN] surface hétérogène Résumé : (Auteur) Evapotranspiration is an important part in surface energy balance and water balance. Compared with other methods (micrometeorological, climatological, or hydrological method), the remote sensing model has obvious superiority to estimate regional evapotranspiration over heterogeneous surfaces. In this study, based on Landsat TM/ETM+ data and meteorological data, evapotranspiration in Beijing area on 17 April 2001, 12 April 2002, 06 July 2004, 06 May 2005, and 22 May 2005 were calculated by an estimation model of regional evapotranspiration. Comparisons of energy balance components (net radiation, soil heat flux, sensible and latent heat flux) with measured fluxes were made integrating the remotely sensed fluxes by the footprint model. Results show that latent heat flux estimates (adjusted for closure) with errors (MBE1RMSE) 26.47142.54 Wm-2, sensible heat flux error of -8.56123.79 Wm-2, net radiation error of 25.16150.87 Wm-2 and soil heat flux error of 10.68122.81 Wm-2. The better agreement between the estimates and the measurements indicates that the remote sensing model is appropriate for estimating regional evapotranspiration over heterogeneous surfaces. Furthermore, the spatial distribution of evapotranspiration in Beijing area was analyzed. Copyright ASPRS Numéro de notice : A2007-477 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.73.10.1169 En ligne : https://doi.org/10.14358/PERS.73.10.1169 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28840 [article]