Evaluation of natural vulnerability to contamination of Serra Geral aquifer system In Paraná – Brazil

• Main Authors: Vinícius Menezes Borges, Gustavo Barbosa Athayde, Pedro Antônio Roehe Reginato
• Format: Article
• Language: English
• Published: Associação Brasileira de Águas Subterrâneas 2017-10-01
• Series: Revista Águas Subterrâneas
• Subjects: Vulnerabilidade. DRASTIC. GOD. Sistema Aquífero Serra Geral.
• Online Access: https://aguassubterraneas.abas.org/asubterraneas/article/view/28857

Groundwater is an important source for human supply, however, it is more and more exposed to contamination due to urbanization, industrial and agricultural expansion. This paper presents a study in regional scale about the natural vulnerability of groundwater in the Serra Geral Aquifer System in Paraná. DRASTIC and GOD methods with adaptations for fractured aquifers were used and compared through normalization of vulnerability values. The map obtained by DRASTIC method presented the following levels of vulnerability: low (5,01%), moderate (83,13%) and high (11,85%). GOD method presented low (66,21%), moderate (0,67%), high (14,32%) and extreme (18,81) vulnerability. DRASTIC method presented better spatial detail and more intermediate values, while GOD showed abrupt due to the simple parameterization. Although the DRASTIC method presented better results, the choice for a method must be conditioned to the data, human and financial availability.