Impacto de incêndios florestais na conectividade no semiárido

Abstract

Forest fires are, as a result of human actions, becoming environmental disasters affecting biomes that are not naturally adapted to fire, such as the caatinga. As a result of climate change and the increase in the number of fires, there is a need to understand their impact on the overall environmental dynamics. One way to analyze these changes is by the concept of sedimentological connectivity, which can be explained as the physical links for the potential transfer of sediments along the channel. To this end, the present work aims at analyzing the impacts of wildfires on sedimentological connectivity using remote sensing images from before and after wildfires, and applying connectivity and vegetation indexes. The results show an increase in the dynamics of connectivity in the area, being proportional to the level of fire intensity. The images with application of the vegetation index show a difficulty in the recovery of the area. Finally, the limitations of using the roughness input values proposed for fires were observed.