The use of electrical resistivity method for groundwater exploration in Sool and Gebiley regions in Somaliland

In this thesis study, hydrogeological and geophysical studies were conducted to determine the groundwater potential of Somaliland. The aim of the study is to identify suitable aquifer areas for groundwater drilling in selected cities and villages. In this thesis study, groundwater research was conducted in three different regions of Somaliland. Geophysical studies were carried out in Sool Region, Togdheer Region, and Awdal Region. In this thesis study, the Vertical Electrical Sounding method was used in groundwater research. Resistivity measurements were carried out using the Schlumberger electrode opening at 19 VES measurement points in four different regions. AB / 2 expansion has been taken at a maximum of 700 meters in the study area. Using the apparent resistivity values obtained from the study area in the Surfer program were prepared apparent resistivity floor maps of underground for AB / 2 100 m, 150 m, 200 m, and 400 meters. With these maps, lateral and vertical changes in the apparent resistivity values in the study area have been clearly identified. IPI2Win computer program was used to evaluate the VES data obtained from the study area. As a result of the evaluation, it was determined that the real resistivity values of underground layers ranged from a minimum of 0.24 ohms to a maximum of 5574 ohms. It was determined that the thickness of the underground layers varied from a minimum of 0.14 m to a maximum of 342 m. Geoelectric maps of the underground were created using the resistivity values and thickness values obtained. By correlating these geoelectric maps with the geology of the region, areas with suitable groundwater potential in the study area were determined. Areas with groundwater potential are designated as VES 2 in the Godalo region, VES 2 in the Gambadho region, VES 1 in the Qoryale region, and VES 4 in the Magalo'ad region. The maximum drilling depth in the study area was determined as 350 meters. A sufficient amount of groundwater was obtained by drilling afterward at the proposed measurement points. The drinking water requirement of the region was provided.