| One of the key problems associated with potable groundwater development in northern Ghana is the hydrogeology of the Voltaian. Data from 332 boreholes, EM 34 ground conductivity data, aerial photographs, and Landsat thematic mapper imagery from the Gushiegu-Karaga, Savelugu-Nanton and West Mamprusi districts were evaluated to help understand fracturing patterns. The majority of the fractures trend NW-SE and NE-SW directions, and the NE-SW fractures are more intense and favor groundwater occurrence. Soils are generally more clayey in the valleys than the uplands. Thick soil areas have low well yield and success rates. The lowland areas act as groundwater recharge areas and upland areas contain the highest yielding wells. High fracture density correlates positively with well yield. Correspondence data analysis indicates well yield is inversely related with soil thickness, static water level, and dynamic water level; aquifer thickness and yield have a positive correlation with ground elevation and well location. |
