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Kwame Nkrumah University of Science and Technology (2003)

Prospecting for Groundwater In The Voltaian Sedimentary Basin Of Gushiegu-Karaga District In The Northern Region Of Ghana, Using The Electromagnetic (EM) Method

Noye, Reginald Mensah

Titre : Prospecting for Groundwater In The Voltaian Sedimentary Basin Of Gushiegu-Karaga District In The Northern Region Of Ghana, Using The Electromagnetic (EM) Method

Auteur : Noye, Reginald Mensah

Université de soutenance : Kwame Nkrumah University of Science and Technology

Grade : ?? 2003

Résumé
Water supply problems in Gushigu-Karaga District in the Voltaian Sedimentary Basin have attracted the attention of government, non-governmental organizations and private sector agencies. The policy of government has been to solve the acute water problem to enhance the socio-economic life of the people. The district is one of the most deprived in the Northern Region of Ghana in terms of water supply. Only about 15% of the population have access to potable water, and has a chronic water supply problem. In this study a ground geophysical technique such as the EM method employing GEONICS EM 34-3 has been used with only a 20-metre cable to delineate and locate water-bearing zones. The EM data obtained along traverse lines have been plotted and presented in profiles with a microcomputer. The profiles of interest have been analysed and interpreted qualitatively to locate suitable and potential sites to drill boreholes for groundwater abstraction. Drilling results and findings from typical drill logs show that the mean depths of productive and unproductive boreholes were respectively 41.0 m and 64.0 m. The groundwater producing zones were found to be between 30.0 m and 60.0 m. However, 60% success rate was achieved out of 100 boreholes drilled. When compared with the success rate of existing boreholes, the 60% success achieved was 20% higher. To a very large extent, the results agree with those of previous groundwater exploration projects. Therefore, to increase potable water supply to the district through the groundwater option a geophysical technique such as the EM method, which is fast method, which is fast, efficient, less laborious and cost effective can be depended upon for accelerated rural water supply programme in the district.

Présentation

Page publiée le 27 septembre 2010, mise à jour le 13 juillet 2018