Integration of Airborne Geophysical Data, and Remote Sensing, in Groundwater Potential Mapping in the Central Region of Ghana.

In the Central Region of Ghana, electromagnetic, electrical resistivity, and magnetotelluric surveys have been used extensively for groundwater exploration for specific locations in the region. In order to determine the spatial distribution of groundwater potential across the region, airborne magnetic and radiometric data, and remote sensing data was used in addition to Weighted Overlay Model in a Geographic Information System’s environment leading to identification of five groundwater potential zones: very low, low, moderate, high and very high. Assessment of the groundwater potential zones mapped, shows that approximately 0.91%, 14.03%, 56.20%, 27.53% and 1.32% of the area respectively were observed to constitutes very low (yield ≤ 0.66 m3/h), low (0.66m ³ /h < yield ≤ 2.4 m ³ /h), moderate (2.4 m ³ /h < yield ≤ 6.3 m ³ /h), high (6.3m ³ /h < yield ≤ 14.4m ³ /h) and very high (> 14.4 m ³ /h) groundwater potentials zones. Validation potential zones using modified Index of Agreement and Modified Nash-Sutcliffe Error gave 0.81 and 0.74, efficiencies respectively. These efficiencies respectively show very good and good estimates for the hydrological model, showing that the method adopted in delineating groundwater potential is very good, and can be adopted for future detailed groundwater exploration in the area.