Geotecnologias e análises das transformações ambientais da bacia hidrográfica do Córrego Narciso: Porto Nacional, Brejinho de Nazaré – Tocantins.

Abstract

The present work refers to geotechnology and analysis of environmental transformations in the Córrego Narciso hydrographic basin: Porto Nacional, Brejinho de Nazaré - Tocantins. Emphasizing the aspects of Land Use and Occupation between the years 1990 and 2023. In this sense, the main objective is to verify the transformations that occurred in the environment around the Hydrographic Basin, in question related to the different modes of Use and Occupation of the Earth. As a method, we opted for Remote Sensing techniques, using images from Landsat 5 satellites, TM sensor (Thematic Mapper) from the years 1990 and 2000 and sensor 8, OLI (Operational Land Imager) from 2010 and 2023, with a spatial resolution of 30 meters, obtained free of charge via the USGS - United States Geological Survey and INPE – National Institute for Space Research websites. The software used was QGIS version 3.22.5 and version 3.16. In general, the results provided the observation of significant environmental transformations that occurred around the Hydrographic Basin as a result of Land Use and Occupation, highlighting mainly the reduction of vegetation in favor of the agricultural activities carried out. The importance of using Remote Sensing techniques to analyze the evolution of environmental transformations and aspects of Land Use and Occupation as a tool for environmental management and use planning is also highlighted.