masterThesis
Frequência de coliformes termotolerantes em praias do litoral potiguar (Rio Grande do Norte, Brasil)
Fecha
2019-03-21Registro en:
ROCHA, Amanda Carla Batista Querino da. Frequência de coliformes termotolerantes em praias do litoral potiguar (Rio Grande do Norte, Brasil). 2019. 26f. Dissertação (Mestrado em Engenharia Sanitária e Ambiental) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2019.
Autor
Rocha, Amanda Carla Batista Querino da
Resumen
Development of tourism in Brazil is related to natural resources and landscapes, including
the Brazilian Northeast littoral beaches, where there is a huge concerning about water
quality for recreation (balneability). In Brazil, impacts on the coastal environments are
caused by lack of basic sanitation and disordered land use, dispersing pollutants on the
sea, affecting public health especially because thermotolerant coliforms spreading, the
main indicators of balneability to beaches. In this work, we analyzed the dynamics of on
the 48 beach spots of Rio Grande do Norte State (Brazil) between 2010 and 2016,
proposing also a Balneability Index (BALI) that summarizes, based on visual and
physical aspects, the beaches sanitary and environmental conditions. Results appointed
that: i) 7% of the samplings has thermotolerant coliforms above to the maximum accepted
limit (1000 NMP/100ml); ii) there is none pattern in coliforms temporal dynamic; iii) all
the points have high variation in relation to mean values; iv) beaches close rivers’ mouth
have greater frequency of coliforms, especially in Potengi River which have, 25% of the
samplings above accepted limit; v) correlations between precipitation and coliforms
concentration are not high (r < 0,369), nonetheless are significant; vi) the proposed index
(BALI) had low values only for the Natal city and in general also it shows low correlation
to coliforms concentrations. Our main conclusion is that beaches close rivers should be
avoided. Moreover, it is necessary more investments on sanitation, inclusive waste care,
especially in Ponta Negra, Praia dos Artistas e Redinha beaches (all in Natal City).