Variabilidade espectral da penetração da luz na coluna d''''água na região de confluência entre os rios Tibagi e Paranapanema - PR
Remote sensing products applied in aquatic environments represent the interaction of electromagnetic radiation with the optically active components along the euphotic zone of the water column. Understand the light attenuation processes along the water column can be useful for the construction and improvement of bio-optics models. In this work we present a study focused on the energy behavior along the water column with the objective of comparing relationships between the spatial variation of light availability with the spatial distribution of the optically active components concentrations in a region of confluence between the Tibagi and Paranapanema Rivers, Paraná, Brazil. The results showed considerable homogeneity in the characteristics of water bodies, indicating predominance of dissolved materials. We cannot identify regions with significant variability in concentrations of optical active components so, we not be able to infer the validity of the hypothesis that the spectral range that defines the euphotic zone limit is variable and dependent on the water composition and distribution of its optically active components.