Abstract
The presence of both weathered rocks and fractured crystalline bedrock aquifers makes Hydrogeology in Gbeke region of Cote d’Ivoire. Access to water in this region is not easy. This study focuses on the influence of borehole depth, weathering thickness and electrical resistivity of the geological structures on borehole productivity that exploit the crystalline aquifer system. Bivariate analysis was used to determine the relationships between these factors and specific capacity for measuring borehole productivity. The values ranged from 0.0088 to 2.20 m3∙h−1∙m−1. The analysis shows that there is no correlation between productivity and weathering thickness. However, weathering depths between 15 and 35 m provide the highest specific capacity values (Qs ≥ 1 m3∙h−1∙m−1). For hydrogeological discontinuities interest, boreholes located in KH, QH and H anomaly curve types were the most productive. As productivity diminishes with depth, a deeper borehole can be more productive if it reaches a geological structure that is favorable for groundwater flow. Those hydrogeological parameters are extremely important in borehole productivity in Gbeke region.
Highlights
This study focuses on the influence of borehole depth, weathering thickness and electrical resistivity of the geological structures on borehole productivity that exploit the crystalline aquifer system
As productivity diminishes with depth, a deeper borehole can be more productive if it reaches a geological structure that is favorable for groundwater flow
The main parameter used in this study to measure borehole productivity was the specific capacity which was grouped from the drilling depths, weathering depth and electrical resistivity anomalies
Summary
Groundwater is a vital water source of supply for drinking, agricultural and in-. Though there are other sources of water such as streams, rivers, lakes and ponds, none is as hygienic as groundwater because groundwater has excellent natural microbiological and generally adequate chemical qualities for the majority of its uses [1]. Because of their accessibility for disposal of various types of waste, surface waters are the most susceptible and vulnerable water bodies to contamination. Groundwater resources and the wise management of these resources are crucial for sustainable development in areas that need the reliable sources of urban and rural water supply
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