Cláudia Miranda et al.RESUMO: A ação antrópica ao longo dos anos, no entorno da microbacia do rio Parafuso, ocasionou impactos ambientais adversos sobre os recursos hídricos. Este estudo tem como objetivos avaliar a qualidade da água do rio Parafuso com base nos atributos físicos, químicos e microbiológicos e identificar os diferentes usos da água pela comunidade local, a fim de obter informação que possa subsidiar propostas para o manejo sustentável da microbacia. Para a avaliação da qualidade da água foram realizadas quatro campanhas, considerando a sazonalidade, com 19 pontos de amostragem. Foram realizadas entrevistas, observação direta e aplicados questionários para coletar os dados sobre os diferentes usos da água pela população local. Os resultados revelam a multifuncionalidade dos rios. Os índices do Ferro e E. coli, em alguns pontos amostrais, ultrapassam os limites exigidos pela legislação, o que denota o comprometimento da qualidade da água na referida microbacia para os diversos usos domésticos.Palavras-chave: Amazónia, ação antrópica, microbacia, recursos hídricos, qualidade da água. ABSTRACT: The anthropic action over the years on surroundings of Parafuso river microbasin caused adverse environmental impacts on water resources. This study aims to evaluate the water quality of Parafuso river and its tributary pass rote, based on physical, chemical and microbiological attributes, as well as identify the different uses of water by the local community, in order to obtain in formations to
The elaboration of a study on methods for the determination of ecological flow for the management of the water resources of the Maracaçumé River Basin is very important for the proposed use and conservation of these resources insofar as the uses of water, especially the advisory uses, have changed the flow regimes and the existing water availability. In this context, this work aims to discuss about the applicability of hydrological methods that help in the correct and sustainable management of the water resources. In this way, were applied theQ7,10 Method; the 90% and 95% Method, beyond the Tennant Method with ecological flow corresponding to 30% of the average annual flow. The main results obtained were the characterization of the Maracaçumé River Basin and the flow values obtained in each method (0.541 m3/s, 1,075 m3/s, 0,459 m3/s and 19,50 m3/s for the Q7,10; Q90%; Q95% and Tennant (30%) methods, respectively). The work indicates that for the management of water resources in the Maracaçumé river basin, the ecological flow obtained through the Q90 methodology should continue to be adopted, evaluating the possibility of adapting the maximum percentage of use.
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