Diagnóstico ambiental da bacia hidrográfica do córrego do Bugre em Alumínio - SP

• Autor(a) principal: Tersariol, Pedro Paulo dos Santos [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/124024; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/15-05-2014/000830243.pdf
• topic: Bacias hidrograficas; Água - Qualidade; Alumínio (SP)

The human growth that has occurred after the Industrial Revolution and the postwar period has been drastically pressing natural resources. Alumínio - SP, the major urban area of this municipality is condensed in the sub-basin of the Bugre stream, rather compromising the quality of its waters, especially in the urban area. In this sense, the environmental assessment is key to monitoring and understanding of the status and quality of exploited natural resources and aid decision making. This work conducted over a seasonal year, the diagnosis of water quality in three Bugre Stream points via parameters contemplated in IVA (the Water Quality Index for the Aquatic Life Protection and Water Communities) and IQA (Index Quality of the Waters) CETESB. The first point is located at the source (the area with native vegetation) the second and third are situated in urban area. Parameter data were statistically analyzed according to the Principal Component Analysis (PCA). According to the evaluations of points were notable variations in water quality between the three points analyzed, which occurred due to their geographical locations as well as the influence of seasonality in the concentration of pollutants. The second and third point showed very high levels of various contaminants, highlighting the phosphorus and total nitrogen, surfactants, fecal coliforms and chlorophyll-a as well as certain types of metals such as copper and lead. The ACP indicated that the IET (Trophic State Index) was related mainly with phosphorus, IQA (Water Quality Index) with the OD and IPMCA (Minimum Variable Index for the Protection of Aquatic Life) with the presence of surfactants. The results highlight the need for recovery of their physicochemical and microbiological characteristics in urban area. Solutions such as sewage treatment are essential for this recovery. Environmental planning (supported by environmental zoning) within the decision-making by the government ...