Hidrogeologia costeira: Aspectos comparativos em área de sedimento recente do Quaternário Holoceno-litoral do Paraná

Abstract

The coastal hydrogeology has peculiar characteristics, both in quantitative and qualitative points of view. In this study, we present the comparative results between two studies in two areas of the coastline of Paraná. One area is located in Valadares Island and the other is in an area located in Pontal do Sul. The results showed that even though the geological features are similar and approximately 17 km, apart the hydrogeological results show considerable variations. The Valadares Island, displayed the effects of the tidal in the groundwater level influences the quality of water and the underground flux which not observed in Pontal do Sul. The hydraulic conductivity variation is close to 102 cm/s. The electric conductivity in Pontal do Sul is considerably lower than Valadares Island, indicating an unconfined aquifer of continental origin and without influence of tidal. The recharge in both areas are mainly related to rainfall. The discharge in Valadares Island is related to the wells that serve the population in the form of supply while in the study of the Pontal do Sul the discharge flows into the Perêque river and its mangrove area in a very narrow and near the beach.