Analise dos impactos ambientais na vegetação de caatinga causados pela urbanização no município de Pombal - PB.

Abstract

The objective of this work was to determine whether changes occurred in the local microclimate of the city of Pombal with the increase in urbanization. The Normalized Difference Vegetation Index, Soil-Adjusted Vegetation Index, Land Surface Temperature and Radiation Balance for the urban perimeter of Pombal for different years were analyzed, seeking to identify the increase in urbanization and the possible impact on the microclimate place. To obtain these indexes, images from the Landsat 8 satellite, from the OLI (Operational Land Imager) and TIRS (Thermal Infrared Sensor) sensors were used in the months of March and October of the years 2014 and 2021. Images were used in the format, GEOTIFF (TIFF ), vectors in Shapefile format (SHP), Digital Elevation Model (DEM) captured through the TOPODATA system and the SEBAL algorithm applied to GRASS 7.2.0 and QGIS 2.14.11 software was used. The results of the indices showed loss of vegetation over the years, pointing to changes in soil cover, as a result of which there was an increase in temperature at the selected points, thus corroborating changes in the local microclimate confirmed by changes in the radiation balance.