RAMOS, Dijaneide Gonçalves.; OLIVEIRA, Aureo Silva de.; SAMPAIO, Claudia Bloisi Vaz.; PEREIRA, Francisco Adriano de C.
Résumé:
When the solar radiation reaches the planet surface three processes can take place, that
is, radiation is reflected, absorbed or transmitted. The reflected fraction is important for imaging of
targets at the surface by remote sensors on orbit. Remote sensing techniques has been largely applied
in water management research, including the estimation of latent heat transfer to the atmosphere from
vegetated and non-vegetated surfaces, as in irrigated areas. The objective of this work is to
demonstrate the application of the SEBAL algorithm (Surface Energy Balance Algorithm for Land)
for the estimation of the albedo in the upper region of the Itapicuru river basin, northeast of Bahia. The
area includes the Ponto Novo Irrigation District, with a total area of 3000 ha from which 400 ha are
actually under irrigation. A Landsat 5 TM image of the region taken on 04/11/13 was used. Minimum
and maximum value of albedo was 3,6% and 40,0%, respectively, with an average of 21,6%. A
frequency histogram is also presented.
