Utilização do índice de qualidade da água (iqa-ccme) para verificação de conformidade ao enquadramento no ribeirão São João em Porto Nacional - TO

Abstract

In Brazil, rivers are the main sources of clean drinkable water. Considering that, these resources are highly exposed to many different human interferences. This have been affecting both its availability and quality. Facing this situation urges the necessity of having tools and management instruments pointing in an efficient and objective way to the protection and sustainable use of this heritage. In Brazil, the law 9.433 from 1997 establishes the management tools for strengthening the multiple uses of these resources; among these instruments, we have the class framework that considers current and future uses. However, for doing a framework it is necessary, above all, determine the quality of these hydric resources, but this is hard and expensive. Facing these conditions the indexes arose and they can communicate with a high number of information in a brief and accessible way. In this work, index was used as instrument for assessment of conformity of quality of water São João River in Porto Nacional – Brazil to the framing. For this purpose, the water quality was monitored in three site through analysis of physical, chemical and biological parameters according to APHA (1995) standard. The methodological process also includes an identification of uses, photographic records and on-site visit held in 2015 and 2016. The results showed that, for the specific case of São João River, we could see WQICCME describes in a holistic and suitable way the water quality; and has evidenced being a good tool for monitoring and evaluating when it comes to framework.