Browsing by Author "Mehari Sisay"

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    Integrated Geophysical Investigation for Mapping Groundwater Potential Zones of the Mersa-Girana Sub Basin, North Wollo Zone, Ethiopia
    (Addis Ababa University, 2024-06) Mehari Sisay; Mebatseyon Shawel; Behailu Birhanu
    This study was conducted in the Mersa-Girana sub basin in north wollo zone, Ethiopia. It aims to map the groundwater potential zones in the area. VES and magnetic geophysical methods were employed to achieve this objective. As part of the geophysical survey, 293 magnetic data were collected at 100 meter intervals along east-west profiles and 10 VES points were acquired along four east –west profiles with an interval of 500 meter between the VES points. In addition to the primary VES data, ten (10) VES data were collected from secondary sources. The VES data were acquired using a Schlumberger array and a maximum current electrode spacing of 1000 m. The results reveal the main aquifer depth is between 43 and 351 meters in the area. Furthermore, the analysis of Dar- Zarrouk parameters in the research area shows that 35% of the aquifers exhibit high productivity, while 65% of the aquifers demonstrate moderate productivity. The estimated hydraulic conductivity and transmissivity values are high in the central and eastern region of the research area. The results of electrical resistivity and magnetic measurements also demonstrates the region is strongly affected by faulting, which is believed to regulate the groundwater movement in the underlying volcanic series.