Avaliação da estimativa da clorofila-a usando algaemap em um sistema estuarino-lagunar tropical

Abstract

This study analyzes the estimation of Chlorophyll-a in water bodies using Sentinel-2 satellite images, aiming to assess the environmental quality of aquatic ecosystems. The research was conducted in the Mundaú-Manguaba Estuarine-Lagoon Complex (CELMM) in Alagoas, using the AlgaeMAp application to integrate satellite data and in situ measurements from previous studies. The objectives include evaluating the temporal compatibility between field data and satellite images, investigating the influence of these differences on the Chlorophyll-a estimation by AlgaeMAp, comparing the results with laboratory analyses, and determining the need for adjustments in the NDCI model for application in the study area. Temporal differences were not a decisive factor, as there were no significant variations in the coefficients, which remained between R2 0.52 and 0.55. However, previous studies conducted in the same region demonstrated adjusted models with superior performance, reaching R2 values greater than 0.8. Thus, the application requires adjustments to the model to improve its accuracy in the study area.