Multitemporal analysis of estuarine islands in the Formoso River basin – South Coast of Pernambuco – Brazil

Abstract

The studied basin of small coastal rivers is located in an area of the Atlantic Forest biome, encompassing four municipalities along the coast of Pernambuco. Four specific dates were chosen for the study: 1989, 1996, 2008, and 2018, aiming to analyze morphometric parameters of the insular space within the highlighted hydrographic basin. Additionally, land use and land cover were discriminated to determine their influence on local morphological processes. The methodological procedures involved data from TM and OLI sensors for the morphometric analysis, while land use and land cover data were obtained from MapBiomas. The results of the areal analysis of the islands showed a decrease in area from the initial year to the subsequent two years of the study. However, in the last year, there was an increase in square kilometers. Regarding local vegetation, there was not a significant differentiation among the analyzed years. The discussion of these findings contributed to a deeper understanding of the hydrosedimentary characteristics of the coastal basins in the Pernambuco region.