Mapeamento de vulnerabilidade dos aquíferos dunas, barreiras e fissural na porção norte do Complexo Industrial e Portuário do Pecém, Estado do Ceará

Abstract

This work presents the natural vulnerability evaluation of the Dunes, Barreiras and Fissural aquifers from the northern Pecém Industrial and Harbor Complex, Ceará, Brazil, by using the DRASTIC and GOD methods. It aims to provide subsidies for environmental planning, in order to guide a management of the local groundwater. The mentioned methods use distinct parameters, being the DRASTIC more robust, restrictive and accurate. The DRASTIC exhibits indices between very low and very high, with predominance of high vulnerability (25%) and very high vulnerability (24.7%). The GOD presents indices between moderate (59%) and high vulnerability (41%). Both methods indicate the Dunes Aquifer as the most vulnerable aquifer on the site, precisely where a steel plant and sites for urban expansion are built. Therefore, actions to prevent possible contamination should be implemented. Both Fissural and Barreiras aquifers deserve equal attention and monitoring, despite less vulnerable. This work is presented as a tool for more effective groundwater management by the responsible public and private sector.