Spatial and Seasonal Characterization of Water Quality in Guanabara Bay (Rio de Janeiro, Brazil)
Journal Title: American journal of Engineering Research - Year 2018, Vol 7, Issue 9
Abstract
This study aimed at the spatial and seasonal characterization of the water quality in Guanabara Bay, an estuarine system in southeastern Brazil from 2010 to 2016, to identify the main factors that contribute to the pollution of these waters. Fourteen monitoring stations were assessed, and seven physical-chemical parameters (BOD, total phosphorus, total ammonia nitrogen, dissolved orthophosphate, turbidity, electrical conductivity and salinity) were statistically analyzed. The northwest area is the most polluted, due to organic load and nutrients from the improper disposal of domestic and industrial effluents. The main indicator for the spatial characterization of the estuary is salinity, since its concentration is inversely proportional to pollution levels. The influence of seasonality on the water quality of the estuary was assessed and worse conditions were observed in the wet season in almost all the monitoring stations.
Authors and Affiliations
Raquel Emerick Pereira Mencarini, Maria José de Oliveira Cavalcanti Guimarães1 ,, LidiaYokoyama1 .
Keywords
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