Análise da Degradação Ambiental do Município de Cabaceiras-PB (Analysis of Environmental Degradation in the City of Cabaceiras-PB)
DOI:
https://doi.org/10.26848/rbgf.v6.2.p287-300Keywords:
desertificação, vulnerabilidade, semiáridoAbstract
O processo histórico do algodão e sisal, a retirada e o uso indiscriminado de lenha e carvão, o pastoreio intensivo das terras em região semiárida ocasiona a degradação ambiental. Este trabalho objetivou o estudo da degradação utilizando técnicas de processamento digital e análise espaço-temporal da cobertura do solo. Utilizando técnicas de geoprocessamento e imagens de satélite de média resolução pôde-se gerar imagen índice de vegetação e através de uma análise espaço-temporal da cobertura do solo, identificar e avaliar as principais causas e consequências da degradação. Observou-se que correu uma recuperação da vegetação na classe densa e semi-rala com aumento de 0,49% e 21,01%, pela introdução da algaroba e pelo abandono das terras, respectivamente. Houve uma diminuição de área da classe baixa de degradação em 11,42% e da classe moderada grave em 10,06%, ocorrendo aumento na classe moderada de degradação, ocasionada pela retirada de lenha e pelo abandono das terras, respectivamente.
A B S T R A C T
The historical process of cotton and sisal, withdrawal and indiscriminate use of firewood and charcoal, intensive grazing land in semiarid region causes environmental degradation. This work aimed to study the degradation using digital processing techniques and spatio-temporal analysis of land cover. Using GIS techniques and satellite images of medium resolution could be generated vegetation index image and through a space-time analysis of ground cover, identify and assess the main causes and consequences of degradation. It was observed that ran a vegetation recovery class semi-thin and dense with increased 0.49% to 21.01%, by inserting the algaroba and the abandonment of land, respectively. There was a decrease in area of the lower class of degradation in 11.42% and severe in the moderate 10.06%, there was an increase in class moderate degradation, caused by the removal of firewood and the abandonment of land, respectively.
Keywords: Desertification, vulnerability, semiarid.
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Copyright (c) 2013 Maria da Conceição Marcelino Patrício, Paulo Roberto Megna Francisco
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