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- Title
Análise espaço-temporal da cobertura vegetal em uma bacia hidrográfica na região do MATOPIBA, Brasil.
- Authors
de Jesus FRANÇA, Luciano Cavalcante; da SILVA, João Batista Lopes; dos Santos LISBOA, Gerson; Piuzana MUCIDA, Danielle; Lima CERQUEIRA, Clebson; Lima SANTOS, Elyzama
- Abstract
The hydrographic basin of the Uruçuí-Preto river, Piauí, with an area of 15.777 km²,, has been characterized over the last 30 years by agricultural expansion, integrating the agricultural frontier of MATOPIBA, composed of the states of Maranhão, Tocantins, Piauí and Bahia. The objective of this study was to evaluate the change in the vegetation cover in this basin from 1984 to 2015. Images of the TM and OLI sensors of the Landsat 5 and 8 satellites, respectively, were used to elaborate mosaics and vegetation enhancement through the Vegetation Index (IVDN), to obtain the evolution of the change in land cover. The supervised classification (Maximum Likelihood) was carried out in five classes: exposed soil, anthropic area, sparse vegetation, sparse vegetation and dense vegetation. The results showed intense anthropization in the analyzed area. In 1984, the exposed soil class corresponded to 390.3 km², of the total basin area, with an increase in 2015 to 1,498.20 km²,. In 1984 there were 7,743.2 km², of original vegetation cover, reduced in 2015, to 3,487.40 km²,, with a reduction of 45.03% of the class of dense vegetation. This study can aid in strategies for the performance of state environmental agencies and environmental planning in order to reconcile the development of agribusiness with the conservation of natural resources.
- Publication
Nativa, 2018, Vol 6, p737
- ISSN
2318-7670
- Publication type
Article
- DOI
10.31413/nativa.v6i0.5843