Characterization of the Fissured Layer Properties in Crystalline Bedrock Aquifers of Gbêkê Region in the Central Area of Côte D’Ivoire

Hard rock aquifers that are of prime interest for water supply lie within the weathered and fissured/fractured layers in crystalline bedrock. Their poor knowledge leads to difficulties in boreholes implementation in the central region of Cote d’Ivoire. The thrust of this study is to evaluate the properties of the fissured layers in crystalline bedrock aquifers of Gbeke region using a statistical analysis of the borehole database. The thickness of the most productive part of the fissured layer varies from 20 to 21 m. The values of the mean productivity of this zone range from 7.78 to 9.93 m3 · h−1. These properties could be of particular interest in the planning and financial evaluation of drilling campaigns.