Relationship between boreholes productivity and major fractures extracted from satellite images of katiola region

The hard rock systems of crystalline basement are now much more under consideration as they may actually constitute viable groundwater resources. The area of katiola is located in the North-Center part of Côte d'Ivoire and belongs to Paleoproterozoic domain, where fractures constitute preferential of flow and accumulation groundwater. This study aims to establish the relationship between the wells efficiency and the structural lineaments detected. The map of major fractures was carried using a 50 x 50 cm radar image processing. A total of 323 major fractures were carried out with a dominant direction N90-100. The flow map was surimposed to those of major fractures to show the relationship between the wells efficiency and the structural lineaments detected. Several boreholes with low flows (0 < Q < 2.5 m3/h) are not superimposed on the major structural lineaments detected and seem have to be implanted using simple geomorphological characteristics. Whoever, more of wells with high flow (Q ≥ 5 m3/h) are match and overlap with open and interconnected fractures. There is an influence of distance between boreholes and major accidents on the productivity of the works. This result show that fractures arrangement and interconnection degree take an important role in storage and conduct properties of hard rock systems in Katiola area. This approach may be used as an indirect mean of fracture network validation which can be used during the future drilling campaigns.