This study aimed to make an integrated study of the hydrogeological and neotectonic aspects in the area of Salinópolis, northeast of Pará, Brazil, on a scale of 1: 125,000, involving the sheets SA-VAV, SA-VA-IV-2 and SA-VA -IV-4. For this, it was made an analysis of the main features of relief and drainage network, in order to determinate the influence of neotectonic processes in the configuration of these elements. Drainage maps were generated in Arc Map version 10.2, using the vector base provided by the Instituto Brasileiro de Geografia e Estatística, which was refined with the use of GeoEye images and anaglyphs, that were generate through the softwares Google Earth Pro and Zoner Photo Studio. The relief maps were created in the softwares Global Mapper v14.0 and Arc Map version 10.2, which was used in digital elevation models with a spatial resolution of 30 meters obtained by the Shuttle Radar Topography Mission. The results show the presence of two distinct structural domains of dextral features: one in the western portion, where there are transtrative faults in N-S direction and strike-slip structures in NE-SW, and another domain in the eastern portion, marked by normal faults in NW-SE direction interconnected by transcurrences in NE-SE and E-W, along with N-S transtrative structures. These structures have changed the geometric arrangement of the aquifers in the region, and have modified the standards of underground hydraulic flow. In the case of trative/ transtrative features, these also define recharge areas to the deeper aquifers, which acquire semi-confined features and interact more intensely with the surface water bodies.
|
