APPLICATION OF VEGETATION INDICES IN THE SPATIAL ASSESSMENT OF VEGETATION OF THE VILA VELHA STATE PARK

Abstract

This research presents the application of the Normalized Difference Vegetation Index (NDVI) and the Soil-Adjusted Vegetation Index (SAVI), in the Vila Velha State Park, located in the municipality of Ponta Grossa, Paraná, Brazil. In this sense, the research aimed to assess the vegetation cover, with the purpose of verifying whether there was degradation of vegetation, regeneration or even any alteration based on Lansat images corresponding to July 2007, 2013 and 2019. The methodological procedures were based on the acquisition images from Lansat 5 and 8 satellites in surface reflectance; generate NDVI and SAVI indices; perform statistical test to confirm the spatial analysis; verification of occurrence of vegetation change between the listed scenes. It should be noted that this study took into account the days without rain before the scenes were obtained. The results show specific differences in vegetation, mainly in the planted forest area where Eucalyptus spp. is planted. There was a rise in the development of the Araucariaceae family in the west part of the PEVV. In the area scored as Steppe-Savana in the management plan, minimal variations were observed, indicating natural development of vegetation cover. The eastern part of the Conservation Unit was more stable. In the conclusions, it is recommended that the spatial evaluations be continued to verify the alterations and the development of the vegetation, both of the herbaceous stratum and of the superior strata, which include a diversity of families influencing Araucariaceae that presented development in the western part of the PEVV, approximately 2 km from the extensive Steppe-Savannah transition area.