O crescimento espontâneo das áreas urbanas sem o planejamento adequado, a precariedade do saneamento básico e sujidades carreadas por meio das chuvas são fatores prejudiciais para a qualidade ambiental das praias, que podem se tornar ambientes propícios à dispersão de doenças. O presente trabalho tem como objetivo analisar a qualidade microbiológica das areias de três praias urbanas do município de Ilhéus, Bahia. Fornece informações úteis para a delimitação de padrões referentes às condições da areia das praias e auxilia na tomada de decisão em relação ao contato dos frequentadores da praia com a faixa de areia. Foi analisado o quantitativo de Escherichia coli nas praias, por meio do método de filtração por membrana, os dados foram comparados entre as áreas secas e úmidas, admitindo como padrões a legislação do município do Rio de Janeiro e de Portugal, que possui uma política nacional sobre monitoramento de areia de praias. Os resultados encontrados nas áreas secas apresentaram-se superiores aos admitidos pelas legislações consultadas, e o inverso foi constatado nas áreas úmidas, onde encontravam-se majoritariamente dentro do permitido por ambas as legislações.
The drainage system of a hydrographic basin is formed by integrated functional systems, which provide ideal conditions for studies aimed at conserving and preserving ecosystems. Given the need to protect remnants of native vegetation in the Atlantic Forest, this study identified the terrain systems of Una River Basin (BHRU), Bahia, through the technical application of terrain assessment and multi-criteria methodological approach. In addition, the identified systems were evaluated for their levels of potential and emerging frailty. The results showed that the BHRU is subdivided into 8 (eight) terrain systems. Considering the relationship between the natural dynamics of the environment and the pressures exerted by anthropogenic activities, it was found that alluvial and coastal systems have areas with high degree of emerging fragility (8.20% of the BHRU). This high degree of emerging fragility is due to its natural characteristics, allied to the increase of anthropized environments that contrast the Buerarema and pre-coast systems, which have more excellent environmental protection due to extensive vegetation cover on their slopes. The study's methodology was shown to be adequate for the identification and characterization of terrain systems in the BHRU and can be replicated in other ecoregions in the country.
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