Integração de dados geológicos e geofísicos em área de construção de barragem no sul do Rio Grande do Sul

Abstract

The study area is located in the municipality of Bagé, in the state of Rio Grande do Sul, near the Camaquã River, and is subject to severe droughts that cause many social problems. Bagé is supplied by three main dams, which are not sufficient to supply the municipality's population. The construction of the Arvorezinha Dam is the alternative for the definitive resolution of the lack of supply for the city's population. However, for a good use of the dam and to avoid possible associated problems, the geological, geotechnical and structural knowledge of the site are fundamental. The monitoring of a dam can be carried out through direct and indirect investigation methodologies in order to qualify and evaluate its real conditions. In this context, this work aims to characterize the subsurface environment of the Arvorezinha dam body, as well as the recognition and structural analysis of the massif, from the application of the geophysical method of Resistivity Electrodes. The data of simple reconnaissance drilling (SPT) were performed and made available by a private company in order to aggregate the interpretation of geophysical methods enabling more informed assessments based on scientific criteria that can be correlated, for a more accurate interpretation of the results.