Aplicação de dados de sensores remotos de baixa resolução espacial, na pesquisa de água subterrânea: bacia do rio do Peixe e adjacências (PB, CE e RN).

Abstract

Most of Paraíba territory is located in a region of semi-arid climate domain, characterized by the scarcity of water resources. The area of ​​the Rio do Peixe Basin and adjacent orographic systems, consisting of gneiss and granitic rocks of the crystalline basement, although economically important for the State, have not yet been evaluated for their water and soil resources. The present work, carried out on a scale of 1: 250,000, aimed to make a geological-structural survey in order to delimit areas most conducive to groundwater research. In the area of ​​the Rio do Peixe Sedimentary Basin and in the crystalline basement, a study of the fracture was made. As a result of this study, eight efforts directions were defined, which may indicate genetic and relative age relationships of evolutionary events in the region. The qualitative and quantitative analyzes showed that the definite failures are contemporary, very old and polytensive, which played an important role in the entire evolutionary history of the region, from the Precambrian to the Phanerozoic. In addition, two shear systems were identified in the region. The first one, of right-handed character, parallel to the sub-parallel to the Patos lineament, and the second, of sinestral character, has general direction N60ºw. Regarding the most favorable areas for groundwater research, these are related to open structure intersections, defined from the analysis of shear systems, such as fracture and lineament beams. Thus, 28 areas most conducive to groundwater research in the crystalline basement and 8 in the Rio do Peixe Basin were identified. Most of these areas were found to be related to structures arranged in the directions N60ºE and N35 ° W.