Distribuição espacial de diferentes classes de Lagoas no Pantanal da Nhecolândia, MS, a partir de dados vetoriais e SRTM: uma contribuição ao estudo de sua compartimentação e gênese

Abstract

This paper presents the application of proportional convolution filters with large size kernels on rasterized thematic maps of saline and hyposaline lagoons, and all lagoons in the Pantanal of Nhecolândia. The filtered images show the spatial distribution of the saline and hyposaline lagoons as well as the relative predominance of each lagoon type. The results demonstrate a relative independence between such distributions, indicating the presence of subtle environment differences during the recent stages of formation of the most peculiar elements of Nhecolândia. These data are crossed with topographical profiles elaborated from SRTM data rendered operational for this plain region after filtering with low-pass mobile average filters. The hypothesis that Nhecolândia is topographically higher in relation to neighboring plains was confirmed after profile filtering. Another hypothesis, related to the predominance of saline lagoons in relatively uplifted areas, was also at least partially confirmed.