Avaliação do Potencial Risco de Contaminação das Águas Subterrâneas na Zona Norte de Natal, RN
Keywords:
Sistema Aquífero Dunas/Barreiras; Hidrogeologia urbana; Vulnerabilidade do aquífero; Potencial de riscoAbstract
The water supply of the northern zone of the city of Natal is made by a mixed system of superficial waters (Extremoz Lagoon) and groundwater. Urban activities have been developing at high rates, and in three decades (between 1978 and 20016) the urbanized area increased from 43.3% to 78.6% of its 70 km2 area. In this work the characterization of soil use and occupation was carried out, with identification of the potential sources of contamination and then the natural vulnerability of the groundwater to be affected by the contaminating activities, with the application of the GOD method and finally the areas with potential risk of contamination of the Dunas/Barreiras Aquifer System. It was verified that 46% of the study area has a medium vulnerability to contamination of groundwater. The most vulnerable sectors are of the order of 21.6% and the most vulnerable comprise only 9.26% of the total area of 70 km2. Potential sources of contamination were mapped and characterized and then potential risks were assessed. The methodology applied in the identification of potential risks contributed to the knowledge of the impacts of urban development in the area of study, making feasible the development of management strategies aiming at the protection of groundwater.
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