Análise de métodos de outorga considerando os aspectos qualitativos e quantitativos

Abstract

As an instrument of the National Water Resources Policy, the granting of the right to use water resources ensures the quantitative and qualitative control of water uses and the effective exercise of access rights to it. The granted user appropriates a certain volume of the water resource, either capturing water or discharging effluents, leaving this volume unavailable to other users. Given this, there is a difficulty in adopting a methodology that, using available data, portrays the capacity of a given water body to receive new effluent discharges. Several methods have been applied by management bodies in order to guarantee an optimal allocation of water to users without compromising the quality of water resources. This work evaluated different methods of analyzing water availability in terms of quantity and quality, in order to find the most effective and accurate methodology, with results closer to reality. The case study was carried out in the hydrographic basin of the Paraíba do Meio union, located between the states of Pernambuco and Alagoas. The results show that when considering the qualitative aspects (effluent discharge) in relation to water availability, the number of stretches compromised is significantly higher. It was also observed that the use of hydrological modeling coupled with a GIS provides more accurate results and better visualization, facilitating the decision-making process of the managing body.