%0 Journal Article
%T Water quality in the lotic area of the Antas river before and after the construction of the Monte Claro hydroelectric plant, south Brazil Qualidade da 芍gua nos trechos l車ticos do rio das Antas antes e ap車s a constru  o da usina hidrel谷trica Monte Claro, sul do Brasil
%A Adriane Marques Pimenta
%A Leonardo Marques Furlanetto
%A Ed谷lti Faria Albertoni
%A Cleber Palma-Silva
%J Acta Limnologica Brasiliensia
%D 2012
%I 
%X AIM: This study characterized the water quality of the lotic areas of the Rio das Antas (Antas River)influenced by the construction of the Monte Claro hydroelectric plant (South Brazil), a run-of-the-river reservoir. METHODS: To assess the water quality, we selected four sampling points based on the results obtained in the water-quality monitoring program performed by CERAN (the Rio das Antas Energetic Company) in the pre-filling (2002-2004) and post-filling (2005-2008) periods. The river flow was monitored during both of the periods. Seasonal samplings were conducted, and alkalinity, chlorophyll a, total and fecal coliforms, conductivity, color, BOD, COD, total phosphorus, nitrate, nitrite, ammoniacal nitrogen, dissolved oxygen, pH, total dissolved solids, suspended solids, sulfates, temperature and turbidity were evaluated. The results were interpreted according to the Brazilian Environmental Council's Water Quality Index, Trophic State Index and CONAMA Resolution 357/05. To verify the occurrence of alterations before and after the plant operation, t-tests were performed. RESULTS: Significant changes in water quality were not observed after the impoundment. The permanence of the characteristics of the natural hydrography was important for maintaining the water quality. The decline of the water quality in a stretch with reduced flow was caused by Burati stream, a tributary containing high concentrations of nutrients and fecal coliforms. CONCLUSIONS:The Monte Claro hydroelectric plant did not alter the water quality of the Antas River. The small reservoir resulting from the plant project favors the maintenance of the water quality of the river and does not favor eutrophication. Attention should be given to Burati stream, a tributary of the Antas River, regarding its high nutrient and coliform content. OBJETIVOS: Este estudo caracterizou a qualidade da 芍gua nos trechos l車ticos do rio das Antas influenciados pela constru  o da usina hidrel谷trica Monte Claro, com reservat車rio tipo fio d'芍gua. M谷TODO: Foram selecionados quatro pontos do programa de monitoramento da qualidade da 芍gua executado pela CERAN - Companhia Energ谷tica rio das Antas, nos per赤odos pr谷-enchimento (2002-2004) e p車s-enchimento (2005 a 2008). Foi monitorada a vaz o do rio pr谷 e p車s-enchimento do reservat車rio. As amostragens foram sazonais, e utilizadas as vari芍veis alcalinidade, clorofila a, coliformes totais e fecais, condutividade, cor, DBO, DQO, f車sforo total, nitrato, nitrito, nitrog那nio amoniacal, oxig那nio dissolvido, pH, s車lidos dissolvidos totais, s車lidos suspensos, sulfatos, temper
%K Rio das Antas
%K barragens
%K limnologia de rios
%K IQA
%K IET
%K Antas River
%K dams
%K stream limnology
%K WQI
%K TSI
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2012000300010