Passig F H, Lima S B, Carvalho K Q, Halmeman M C R, Souza P C, Gusmão L K
Departamento Acadêmico de Química e Biologia, Universidade Tecnológica Federal do Paraná, Curitiba, PR, Brazil.
Departamento Acadêmico de Ambiental, Universidade Tecnológica Federal do Paraná, Campo Mourão, PR, Brazil.
Braz J Biol. 2015 Dec;75(4 Suppl 2):S158-64. doi: 10.1590/1519-6984.01213suppl. Epub 2015 Nov 27.
The Mourão River basin is located on the central western region of the Paraná State - Brazil, between coordinates 23º 44' - 24º 25 South latitude and 52º 12' - 52º 30' West longitude, between 270 and 820 m above sea level, and 1,648.21 km2 drainage area. Water quality was evaluated by monitoring physical, chemical and microbiological parameters. Monthly samplings were performed for a year at five sites in the basin for analysis of: pH, temperature, dissolved oxygen, biochemical oxygen demand, total nitrogen, ammoniacal nitrogen, nitrite, nitrate, total phosphorus, turbidity, total solids, volatile solids and fecal coliforms. The results of the evaluated parameters showed higher values than the limits set by CONAMA Resolution 357 from 2005 for Class 2 in some samples. The Water Quality Index (WQI) indicated that 72% of samples had average quality and 28% had good quality for the Mourão River basin. Higher values of WQI were observed after rainfall period with median of 75 compared to the dry period with median of 62. The source of the Mourão River is contaminated with fecal coliforms, evidencing the real need to treat sewage in rural areas.
莫朗河流域位于巴西巴拉那州中西部地区，南纬23°44′至24°25′、西经52°12′至52°30′之间，海拔270至820米，流域面积1648.21平方公里。通过监测物理、化学和微生物参数对水质进行评估。一年内每月在该流域的五个地点进行采样，以分析以下指标：pH值、温度、溶解氧、生化需氧量、总氮、氨氮、亚硝酸盐、硝酸盐、总磷、浊度、总固体、挥发性固体和粪大肠菌群。部分样本的评估参数结果高于2005年巴西国家环境委员会第357号决议规定的2类水质限值。水质指数（WQI）表明，莫朗河流域72%的样本水质为中等，28%的样本水质良好。降雨期后的WQI值较高，中位数为75，而干旱期的中位数为62。莫朗河源头受到粪大肠菌群污染，这表明农村地区确实需要处理污水。
