RISCOS DE CONTAMINAÇÃO DA ÁGUA SUBTERRÂNEA ASSOCIADOS AO USO E COBERTURA DO SOLO URBANO EM APODI - RN

Abstract

Groundwater has been used for domestic supply in most Brazilian municipalities, in some of these, this is the only available source. The city of Apodi-RN is part of this frame, insert in the context of the semi-arid Northeast, the groundwater is a strategic resource for the urban supply, however, the lack of monitoring and effective policies to protect underground sources often put this resource at risk. This study sought to characterize the capture and use of groundwater, as well as the analysis of potential risks associated with the use and coverage of urban land. For this, data from 48 wells of the Groundwater Information System – SIAGAS/CPRM. Through them, the abstraction and use of groundwater were analyzed, as well as aspects of quality and aquifer geometry, in addition to the mapping of risks through the integration of data in the geographic information system - GIS revealed that the main potential sources of contamination are the rudimentary septic tanks, associated with the strong urban expansion in the last 30 years, without, at least, sewage collection and treatment systems. In addition to domestic effluents, cemeteries and fuel stations also pose a risk. The study contributed to the systematization of basic information for urban planning that considers protective measures for groundwater, considering the need for sustainable use of this resource as a fundamental source for local urban supply.