Análise da eficiência do monitoramento de qualidade das águas superficiais : caso da bacia hidrográfica do Rio Cuiabá - MT

Abstract

In nowadays the water bodies degradation is a global problem. Its control is one of the great challenges of water resources management. Monitoring is the only way we have for assessing water quality and making water conservation decisions. To standardize water quality monitoring at the national level, the National Water Agency (ANA) created on July 2013 the Resolution ANA N° 903 (Res-ANA-903) which establishes the National Water Quality Network (RNQA) and its operating structure. The network main goal is to monitor and generate information to support water resources management and make available to society information about surface water quality. The network's objective is to monitor and generate information to support the management of water resources and provide society with information on the quality of Brazilian surface waters. Thus, the objective of this work is to analyze the data quality and the usefulness of the information produced by the surface water quality monitoring program in the Cuiabá River hydrographic basin, in order to verify the adequacy of the data generated during field sampling and subsequent analysis. laboratory with the information possible to be generated from these. An analysis was carried out from the perspective of the time series to verify whether it is possible to extract some information that allows inferring about the long-term trend and from the perspective of statistical inference to quantify the confidence intervals of the mean value with a certain degree of statistical and scientific significance. observed of the quality variables sampled in each of the twenty active stations located in the area of the Cuiabá River Hydrographic Basin. The practices of field sampling, laboratory analysis and storage of records in a database, which although they are advancing towards integrating a network, still need to be improved so that the products generated as a result of this costly operation can in fact give conditions to the manager in make decisions regarding water, its effective quality and in sufficient quantity for multiple uses and the maintenance of the environmental system.