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Study of environmental degradation of the Bodocongó Watershed, at Campina Grande, State of Paraiba, Brazil

Author(s): Silvana Silva de Medeiros | João Miguel de Moraes Neto

Journal: Engenharia Ambiental : Pesquisa e Tecnologia
ISSN 1678-2178

Volume: 5;
Issue: 3;
Start page: 94;
Date: 2008;
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Keywords: Bodocongó stream | Vegetation | degradation | Digital processing

The study area is located in the western region paraiban marsh at the county of Campina Grande. The study aimed to develop thematic maps that depict the expansion space-temporal of the vegetation and degradation of the Bodocongó stream basin, for the period from 1989 to 2007, through the analysis of TM/Landsat-5, CCD / CBERS - 2 images and data from fieldwork. The digital processing of Landsat imagery was conducted at SPRING - 4.3. The results showed that the area presented classes of dense vegetation ranging from the exposed soil and levels of degradation ranging from very low to severe. In the period between the years 1989 and 2007, the classes of semi-dense vegetation, semi-sparse and sparse had this areas of occurrence decreased to 23.6%, 3.22% and 25.3% of the total area of the basin, respectively. From opposite way, the classes of dense vegetation and soil exposed increased in the period, and will occupy 7.13% and 39.9% of the total area of the basin, respectively. The levels of degradation low, moderate and moderately severe had their areas of occurrence decreased to 13.8%, 10.24% and 40.24% of the total area of the basin. From opposite way, the areas of low and very serious degradation increased in the period, going to occupy, respectively, 5.15% and 29.81% of the total area of the basin.
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