Aspectos físicos, químicos e microbiológicos das águas dos rios Prainha e Uraim, Paragominas, Pará, Brasil

Abstract

14Physical, chemical and microbiological aspects on the Prainha and Uraim Rivers water, ABSTRACT The quality of water bodies currently involves laboratory analysis of physical, chemical and microbiological aspects that are altered as a result of urbanization. The objective of this research was to analyze three occurring aspects of two urban rivers: Prainha and Uraim, in the municipality of Paragominas -PA. This method used presented quantitative and qualitative coverage and exploratory character. Water sampling occurred at six different points (three in each of the two water bodies analyzed) according to the recommendations of the National Water Agency and the National Health Foundation. The laboratory analysis of physical parameters (electrical conductivity, temperature, turbidity, total solids, luminosity, wind speed and depth); chemical (hydrogen ionic potential, biological oxygen demand, phosphorus, nitrogen, dissolved oxygen, ox reduction potential); microbiological (term tolerant coliforms). All data obtained and analyzed indicated that the electrical conductivity and variations are associated with the seasonal period analyzed; the tendency of temperature increase in the Prainha River (27 °C) was more effective due to absence of marginal vegetation; in relation to the chemical, the pH is slightly acidic (5.0 to 5.9), and the microbiological, the concentration of thermos tolerant coliforms show a tendency of increase in the rainy period (+ 41.5%) due to the surface runoff during the rainy period in the Prainha river, which do not occur in the Uraim river. KEYWORDS: ciliar forest; hydrogen ionic potential; sediments RESUMO Atualmente, a qualidade dos corpos hídricos envolve análises laboratoriais de aspectos físicos, químicos e microbiológicos que são alterados em função da urbanização. O objetivo dessa pesquisa foi analisar três aspectos ocorrentes de dois rios urbanos: Prainha e Uraim, no município de Paragominas -PA. O método utilizado apresentou abrangência quantiqualitativa e caráter exploratório. As amostragens da água ocorreram em seis pontos distintos (três em cada um dos dois corpos hídricos analisados) de acordo com o preconizado pela Agência Nacional de Águas e Fundação Nacional de Saúde. A análise laboratório dos parâmetros físicos (condutividade elétrica, temperatura, turbidez, sólidos totais, luminosidade, velocidade do vento e profundidade); químicos (potencial hidrogeniônico, demanda biológica de oxigênio, fósforo, nitrogênio, oxigênio dissolvido, potencial de oxirredução); microbiológicos (coliformes termotolerantes). Os dados obtidos e analisados indicaram que a condutividade elétrica as variações estão associadas ao período sazonal analisado; a tendência de elevação da temperatura no rio Prainha (27 °C) foi mais efetiva devido à ausência de vegetação marginal. Em relação ao químico, o pH encontra-se ligeiramente ácido (5,0 a 5,9), e ao microbiológico, a concentração dos coliformes termotolerantes apresentam tendência de elevação no período chuvoso (+ 41,5%), devido o escoamento superficial ...

Characterization of water quality and the effects of land use and seasonality on springs in eastern Amazonia

“…The drainage system, which extends throughout the municipality, has the Capim River and Gurupi River Basins as the main ones, which are subdivided along 54% and 46%, respectively, of the entire area of the municipality of Paragominas (Pereira Jr. et al, 2019).…”

“…Understanding how these land-use changes will affect the water functions of Amazonian rivers is important for minimizing or mitigating any potential adverse impacts and for the purposes of governmental environmental planning and regulations. Moreover, springs are important hydrologic and biogeochemical elements in landscapes because they connect the terrestrial environment with larger rivers (Figueiredo et al, 2010) and more information on water quality in springs is needed (Hunke et al, 2015;Pereira Jr. et al, 2019).…”