Definição de parâmetros prioritários para o enquadramento de bacias hidrográficas em processo de urbanização

Abstract

The framework of water bodies in classes according to the predominant uses is one of the instruments of the National Water Resources Policy (PNRH) that through the achievement or maintenance of goals is possible in a segment of a water body. The evaluation of the physical-chemical and biological parameters established in the legislation characterizes the quality of the water and, thereafter, the necessary actions are defined to achieve the framework. However, financial and logistic limitations can make the monitoring essential to achieve the intermediate and final goals of the desired water quality unfeasible. In this way, the selection of priority parameters is vital to meet demands and understand the relationship between land use and occupation and pollution sources. Therefore, this work aims to define a minimum set of priority parameters for framing watersheds in urbanization processes. For this, the characterization of the Riacho Doce watershed was carried out, through the mapping of land use and occupation and the uses of water, and quali-quantitative evaluation with the use of statistical analysis, the self-depuration capacity and application of ICE for the validation of the set of parameters. It was perceived that the set of methodologies used can support the decision makers in setting the priority parameters to be monitored and achieving the goals of the water body framework.