Present address: Department of Applied Physics, University of Castilla-La Mancha, Plaza de Manuel Meca, 1-13400 Almadén, Spain.
Pixel-oriented land use classification in energy balance modelling
Article first published online: 15 OCT 2012
Copyright © 2012 John Wiley & Sons, Ltd.
Volume 28, Issue 1, pages 25–36, 01 January 2014
How to Cite
Scavone, G., Sánchez, J. M., Telesca, V., Caselles, V., Copertino, V. A., Pastore, V. and Valor, E. (2014), Pixel-oriented land use classification in energy balance modelling. Hydrol. Process., 28: 25–36. doi: 10.1002/hyp.9507
- Issue published online: 16 DEC 2013
- Article first published online: 15 OCT 2012
- Accepted manuscript online: 3 AUG 2012 08:23PM EST
- Manuscript Accepted: 4 JUL 2012
- Manuscript Received: 30 JUL 2011
- pixel-oriented land use classification;
- energy balance;
- actual evapotranspiration;
- heat fluxes;
Mass and energy transfer between soil, vegetation and atmosphere is the process that allows to maintain an adequate energy and water balance in the earth–atmosphere system. However, the evaluation of the energy balance components, such as the net radiation and the sensible and latent heat fluxes, is characterized by significant uncertainties related to both the dynamic nature of heat transfer processes and surfaces heterogeneity. Therefore, a detailed land use classification and an accurate evaluation of vegetation spatial distribution are required for an accurate estimation of these variables. For this purpose, in the present article, a pixel-oriented supervised classification was applied to obtain land use maps of the Basilicata region in Southern Italy by processing three Landsat TM and ETM+ satellite images. An accuracy analysis based on the overall accuracy index and the agreement Khat of Cohen coefficient showed a good performance of the applied classification methodology and a good quality of the obtained maps. Subsequently, these maps were used in the application of a simplified two-source energy balance model for estimating the actual evapotranspiration at a regional scale. The comparison between the simulations made by applying the simplified two-source energy balance model and the measurements of evapotranspiration at a lysimetric station located in the study area showed the applicability and the validity of the proposed methodology. Copyright © 2012 John Wiley & Sons, Ltd.