Application Of Integrated Geophysical Techniques To Map Deep Groundwater Potential Zones And Geological Structures At South-west Akaki South-east Of Addis Ababa Ethiopia

This study entitled ‘Application of Integrated Geophysical Techniques to Map DeeprnGroundwater Potential Zones and Geological Structures, South-West Akaki, South-Eastrnof Addis Ababa, Ethiopia’ was done using Vertical Electrical Sounding and Magneticrngeophysical methods. The aims of the study are to investigate the deeper high potentialrngroundwater saturated zones and linear geologic structural elements which dissect thernstudy area and could possibly act as a hydraulic barrier that impedes or enhance thernmovement of the groundwater. Further, the work is aimed at determining the depth tornwater table and identification of drilling point through interpretation of the geophysical,rngeological and borehole data. Geophysical data have been measured, processed andrninterpreted in one and two dimensions using special software. The results ofrninterpretation indicate that the study area composed of two aquifers, the first is the UpperrnBasalt aquifer which is slightly confined between alluvial deposits (upper) and MassivernBasalt and Trachytes (lower) and the second is Lower Basalt aquifer which is confined byrnthe Tarmaber Basalt. The depth of the upper aquifer is ranging from 40 to 70m while therndepth of the lower aquifer is greater than 250m. The area is dissected by fault elements ofrnNW–SE and NE–SW trend.rnKey words: Magnetic anomalies and Pseudo and Geo-electric section; Magnetic andrnelectrical properties of Earth materials

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