ANDRADE, M. C. P. F.; http://lattes.cnpq.br/3236384640219232; ANDRADE, Maria Clara Palmeira Furtado.
Résumé:
Over the years, monitoring of the vegetation cover and climate change of the Brazilian semiarid
region should be seen as an efficient safety measure in an attempt to mitigate the effects of
droughts in the region. The safety of monitoring of the semi-arid region in the face of climatic
variability and anthropogenic actions establish the vulnerability of this region. The analysis of
space-time variation of surface albedo and Enhancement Vegetation Index, in parallel with
studies on accumulated precipitation, become effective actions for the inspection of this area,
with characteristics and environmental richness unique to Brazil. Thus, this study aims to
identify degraded areas of the semi-arid region, especially the cut-off area of the contribution
basin of the Boqueirão reservoir, from the 215/065 scene (orbit / point), using long time series
of remote sensing. To this end, satellite imagery of the Landsat family was used, in a temporal
interval of 34 years, together with meteorological data for application in the Automatic
Processing Service of SEBAL and consequent obtaining of the desired byproducts, surface
albedo and index of enhancement of the vegetation. Then, the linear correlation coefficient was
calculated between the spectral variables and the time to identify the areas of degradation. The
results obtained demonstrated importance of the orbital data processing automatic systems,
which allowed the production of a large volume of information for the study area. The variables
used proved to be efficient in the process of monitoring changes in land cover, demonstrating
the capacity of the remote sensing to monitor the spatial and temporal variability of the semiarid
vegetation.
