Análise Multitemporal da Cobertura Vegetal Utilizando Sensoriamento Remoto na Reserva Particular do Patrimônio Nacional Santa Cecília II (Corumbá, MS)

Multi-Temporal Analysis Of The Landcover Using Remote Sensing At Private Natural Heritage Reserve Santa Cecília II (Corumba, MS)

Abstract

The Private Natural Heritage Reserve (RPPN) Fazenda Santa Cecília II State, established in Corumbá - MS, in 1998, covers an area of ​​87.29 km². Aiming to evaluate the performance of its ecological function, this study verified the evolution of the reserve's land cover, through the multitemporal analysis of the Normalized Difference Vegetation Index (NDVI) between the years 1996 and 2020. The analysis was performed in QGIS and free images from the Landsat 5 and 8 satellites, TM and OLI sensors respectively, allowing high replicability of the method. By visual inspection of images, 4 types of cover were identified: water, exposed soil, undergrowth and tree-shrub vegetation. Based on ranges of NDVI values ​​collected in samples of each type, the images were automatically classified according to land cover. This procedure allowed quantifying the variation of each cover in the period addressed. The results showed the effectiveness of the RPPN due to the increase in tree and shrub vegetation, from 55.85% of the RPPN area to 70.83%. In addition to the implementation of the reserve, a process of avulsion of the Taquari River recorded in this period by the images contributed to this result, resulting in a significant increase in water availability.