Cluster analysis and geochemical processes for the characterization of the aquifer system in Maracanã/São Luis/MA João Batista Almeida João Filomeno Barros Bruno Alves de Mesquita Carla Maria Salgado Vidal Silva Josué Mendes Filho Horst Frischkorn Maria Marlúcia Freitas Santiago 10.6084/m9.figshare.7507097.v1 https://scielo.figshare.com/articles/dataset/Cluster_analysis_and_geochemical_processes_for_the_characterization_of_the_aquifer_system_in_Maracan_S_o_Luis_MA/7507097 <div><p>ABSTRACT To better know the aquifer system in the Maracanã Environmental Protection Area were collected samples in four campaigns; the first during the drought season and the others in the following rainy one. The water samples were analised for eleven hydrochemical parameters, CE, Ca2+, Mg2+, Na+, K+, Cl-, SO42-, HCO3-, NO3-, Fe and P. Cluster analysis separated the wells in the area, identifing three different groups that exploit water with electrical conductivity in the ranges of 230 to 400 μS/cm, 87 to 210 μS/cm, and 22 to 64 μS/cm, respectively. Data show a predominance of sodium chlorinated water. With these results and identification of geochemical processes determined by changes in concentrations of Fe and P it was possible to develop a model that identifies the aquifer of the aquifer system exploited by each well.</p></div> 2018-12-26 02:54:25 Groundwater Iron Phosphorous Maracanã APA Aquifer system model