Identificação de áreas propícias à pesquisa de água subterrânea através de imagens TM/LANDSAT-5 nas microrregiões homogêneas curimataú (MRH91) e seridó paraibano (MRH90).

Abstract

The main goal of this work, based on a TM/LANDSAT-5 imagery set and on field work data, is to provide a source of information about ground water resources of the study area. It was accomplished a land use, a drainage and water reservoirs survey, as well as a structural study of the geology of the area, aiming to delimit a set of subareas most favorable to ground water research. According to the drainage analysis, the predominant drainage pattern of the area is dendritic. One right-handed shearing system were identified is parallel-subparallel to the lineament of Patos and Pernambuco. 25 most favourable areas to the ground water investigation were identified. They are related to opened structures crossings, defined by an analysis of shearing systems, fracture sheaves and lineaments Most of these areas are related to structures N65°E±5°, N35°E±5° and EW±5°-oriented. Comparative analysis of these results with additional data about deep wells were accomplished, aiming checks on the accuracy of the identification process. Four (04) low potential areas were identified to illustrate the validation of the ground water identification strategy adopted here. Conventional representation techniques were adopted for the most of the analysis and interpretation results. Eight (08) maps were generated. A part of the data set, corresponding to 39,2 % of the study area, was converted to the digital format and processed to generate 11 digital maps.