Resumo

MENGUE, Vagner et al. The Analysis of urban expansion in areas susceptible to flooding using the Model HAND: the case of the Porto Alegre Metropolitan Region, Brazil. GOT [online]. 2017, n.12, pp.231-253. ISSN 2182-1267.  https://doi.org/10.17127/got/2017.12.010.

The aim of this paper is to contribute to the progress in the knowledge about the HAND Model’s potential for evaluation and monitoring of the urban expansion of the Porto Alegre’s Metropolitan Region (RMPA), in areas susceptible to flooding. As a methodological procedure, the combination of nocturnal illumination images with NDVI vegetation indices of the Landsat satellite was used. The HAND Model was applied to identify areas susceptible to flooding. An increase of 22.15% of the urban area occupied between 1985 and 2015 was identified. With the HAND Model it was possible to identify that the new urban occupations are located in quotas of up to 2 meters of elevation in relation to the nearest drainage. This data shows that the expansion areas identified are located in cities with floods problems.

Palavras-chave : Urban expansion; areas susceptible; flooding; HAND model; Metropolitan Region; Porto Alegre; Brazil.

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