MAPEAMENTO ESPAÇO-TEMPORAL DO USO E OCUPAÇÃO DA TERRA E SUA INFLUÊNCIA NA BIOMASSA DOS CORPOS HÍDRICOS

Abstract

Monitoring surface water is one of the major challenges for water resource management. The aim of this project was to map land use and land cover in the Verdão and Bois river basins and analyze their influence on algal biomass of water bodies. Land use and occupation data from the MapBiomas platform was used, covering the period from 1985 to 2021, as well as surface reflectance data obtained from the CBERS-4A sensor, made available by the United States Geological Survey and reprojected for the southern hemisphere. The indices related to the presence of algae and turbidity were calculated from the relationship between the reflectances and the observed concentrations, using models consolidated in the literature. The data was processed using QGIS software. The results showed significant changes in land use and occupation over the period analyzed, with repercussions on the quality of the water bodies. It was possible to identify temporal and longitudinal variations in the presence of algae and turbidity indices, as well as to assess the applicability of the models used for the region under study. This work has contributed to understanding the spatial and temporal dynamics associated with changes in land use and their impacts on water resources, providing input for more effective management strategies.