Avaliação quanti-qualitativa das águas subterrâneas do Município de Eusébio-Ceará

Abstract

This research is being conducted in the city of Eusébio, Ceará, located in the metropolitan area of ​​Fortaleza, northeast portion of the State of Ceará, covering an area of ​​75 km2 and 46,033 inhabitants, aiming to analyze the qualitative status of groundwater Eusébio, Ceará, through physical-chemical and bacteriological analyzes. The methodology consisted of three stages: Pre-Course (bibliographic research, preparation of registration of wells and thematic bases); Field (updating the register of wells, in situ measurements of pH, EC and TDS in 107 wells and then collecting 20 samples for the physical-chemical and bacteriological) and Postgraduate Course (processing and data integration). The Eusébio Municipality is characterized by large real estate projects, but has a sewage coverage rate of only 12.4%, affecting the quality of groundwater. The research area is part of the Hydrogeological Domain Sedimentary represented by Aquifer System Barriers and alluvial and Hydrogeological Domain Cristalino. Regarding quality characteristics, groundwater research area has an average pH of 7.0, however, there are 21 wells that present outside the potability standards concentrations established by Decree No. 2,914 / 2011 MS, since concentrations STD, are within the potability standards. 20 The analysis shows that the concentrations of turbidity, hardness, iron, fluoride, sulfate, nitrite and nitrate, are within the potability standards, with some concentrations chloride (4 samples) and sodium (5 samples) outside the box potability and for microbiological water quality, it was found that 65% of the samples for total coliforms present. The underground water has estimated total reserves of about 54.56 x 106 m3 / year being 17.36 x 106 m3 / year corresponding to renewable reserves and 37.2 x 106 m3 / year to permanent reserves. It is recommended regular monitoring of these wells in order to get a grip on their qualitative aspects, its temporal variation, planning and managing this feature, ensuring sustainable development and quality of life for the population.