Abstract
In this study, the surface energy flux distribution within Akure city, Nigeria, was assessed using a remote sensing-based model. The Surface Energy Balance over Land (SEBAL) model was used to estimate the net radiation, soil heat flux, sensible and latent heat flux over the city. The estimated fluxes were extracted based on Local Climate Zones (LCZ) and the intensity of each component was assessed. Results showed that LCZ_3 and LCZ_6 with the highest impervious surface cover (above 50%) had higher sensible heat flux intensities, while other zones with lower percentage of impervious surface cover such as LCZ_6c and LCZ_9 had lower sensible heat flux intensities. The derived mean sensible heat flux at the built-up zones ranged between 196 W/m2 and 349 W/m2 while the latent heat flux ranged between 78 W/m2 and 295 W/m2. The latent heat flux was lower over the built-up zones compared to the zones with intense vegetation which recorded as high as 415 W/m2. The urban surface characteristics were shown to have impact on the surface energy flux distribution within the city as the components were altered differently and at dissimilar intensities at each zone.
Published Version
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