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- Title
Utilização do NDVI na análise da vegetação após ocorrência de incêndio.
- Authors
Assis LEAL, Fabrício; de SOUZA, Cátia Menezes; da Silva Almeida LEAL, Glória; Pereira MIGUEL, Eder
- Abstract
The objective of this work was to evaluate the vegetation of Emas' PARNA before and after the occurrence of fire, through NDVI. In order to obtain the NDVI, we used images from the ResourceSat-1 satellite, in July/2010 (before) and September/2010 (after). Sampling points in the most representative PARNA vegetation classes were randomized: 60 points in the Campo class, 45 points in the Cerrado class, 35 points in the Várzea class and 35 points in the Mata class. The NDVI values found in the sampled sites, before and after the occurrence of the fire, were compared statistically by the chi-square test (χ²). To quantify biomass loss after fire, the NDVI image before the fire was subtracted from the NDVI image after the fire, thus generating an image of the difference. This image was classified into five classes: low, moderate, medium, high and very high. The results showed that there was a significant difference in the NDVI values before and after the fire, for all types. In relation to the loss of biomass, the Upper class was the most representative among all mapped, representing 41.1%, followed by the middle class (40.6%) and the most extreme class Very High with 7.4%.
- Publication
Nativa, 2019, Vol 7, Issue 2, p226
- ISSN
2318-7670
- Publication type
Article
- DOI
10.31413/nativa.v7i2.6664