Effect of pollution on physical and chemical water data: a multivariate statistical analysis - Fonseca, Dangelys; Correa, Marcus Paulo de Oliveira; Santos, Ramona Rodrigues; Cardoso, Ronald Palandi; Reis, José Salvador da Motta; Sampaio, Nilo Antonio de Souza (GeSec : Revista de Gestão e Secretariado, 2023)