Hydrogeological compartmentation of the Guarani Aquifer System in the serra geral escarpment in the northeast of RS

Published
2018-04-05
DOI: https://doi.org/10.14295/ras.v32i1.28965
Keywords: Guarani Aquifer System. Compartmentation. Hydrogeological Model. Sistema Aquífero Guarani. Compartimentação. Modelo Hidrogeológico.

    Authors

  • Alex Bortolon de Matos Universidade Federal de Roraima - UFRR Universidade Federal do Rio Grande do Sul - UFRGS
  • Pedro Antonio Roehe Reginato Universidade Federal do Rio Grande do Sul
  • Gustavo Barbosa Athayde Universidade Federal do Rio Grande do Sul

Abstract

The objective of this work was to evaluate the compartmentation of the Guarani Aquifer System (GAS) in the Serra Geral escarpment in the northeast of the RS. Therefore, the information of 276 tubular wells and the trace of morphostructural lineament at different scales were used, aiming to promote the delimitation of hydrogeological compartments and to evaluate their influence on the aquifer characteristics. The results were used in the elaboration of a conceptual hydrogeological model. It was observed that the variations of the top of the GAS present relations with the relief of the region. The groundwater flow follows from the highest regions towards the limits of the compartments, following, in general, the top of the GAS, with characteristics of unconfined aquifer. The specific capacity presented a great variation between the compartments, with the most productive wells located near the discharge areas of the aquifer. Regarding the hydrochemistry, it was verified little differentiation between waters, with variations occurring mainly due to the influence of local characteristics. Thus, the results obtained in this study demonstrate that, in the study area, the GAS is compartmentalized, and that this compartmentation has influence both in productivity, as well as in the top of the SAG and in the groundwater flow.

How to Cite
Matos, A. B. de, Reginato, P. A. R., & Athayde, G. B. (2018). Hydrogeological compartmentation of the Guarani Aquifer System in the serra geral escarpment in the northeast of RS. Águas Subterrâneas, 32(1), 130–139. https://doi.org/10.14295/ras.v32i1.28965