Qualidade da Água Oriunda do Escoamento Superficial Simulado em Bacia Hidrográfica
DOI:
https://doi.org/10.5902/2179460X12568Abstract
Dentre as principais fontes de contaminação dos recursos hídricos tanto superficiais quando subterrâneos, o escoamento superficial destaca-se principalmente no carreamento de substancias contaminantes, acarretando em alterações prejudiciais na qualidade da água. O presente trabalho tem como objetivo a determinação das características físicas e químicas da água oriunda do escoamento superficial da bacia hidrográfica do Rio Vacacaí-Mirim. Para a realização do presente estudo foi utilizado o método o método “Cornell Sprinkle Infiltrometer”, que promove uma chuva simulada, com três coletas da água proveniente do escoamento superficial, aos 3, 30 e 60 minutos. Após a coleta, foram realizadas testes em laboratório para a determinação dos parâmetros (Cloretos, Condutividade Elétrica, Cor, Flúor, Oxigênio Dissolvido, pH, Potássio, Sódio, Sólidos Sedimentáveis). Os valores de Cloro variaram de 0,05 a 0,59 mg L-1, Condutividade Elétrica variaram de 31,1 a 188,1 µS cm-1, a Cor oscilou entre 0,9 e 523 uC, as concentrações de Flúor variaram de 0 a 2,1 mg L-1, o Oxigênio Dissolvido variou de 0,9 a 8,4 mg L-1, o pH variou de 5,7 a 7,41, a concentração de Potássio variou entre 0 e 20 mg L-1, os valores de Sódio variaram de 2 a 171 mg L-1, a concentração de Sólidos Sedimentáveis variaram de 0,01 a 5.6 mg L-1. Os resultados das análises da variância, não revelaram interações entre os fatores uso e manejo do solo no início do escoamento superficial para nenhuma das variáveis estudadas, enquanto que as alterações químicas na água em função do período do início do escoamento superficial verificou-se efeito significativo apenas na cor da água.
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