Determination of water table depths using ground penetrating radar- A case study of Knust campus

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The Ground penetrating radar (GPR) is a geophysical technique that is fast becoming a preferred geophysical method for detecting water table. It operates on the principle of transmission and reflection of electromagnetic waves through the ground. In this project thesis, the GPR was used to locate the depth to the water table on the KNUST campus during the dry season (from 10th to 14th January, 2014). The results showed that the elevations of the water table on the entire KNUST campus ranged from 227.0 m to 266.0 m above mean sea level. These corresponded to 22.0 m to 29.0 m in terms of depth. A water table elevation contour map constructed showed that the northern part of KNUST had the highest elevation of water table of 266.0 m (29.0 m depth) level while the south-eastern part of KNUST had the lowest of 227.0 m (22.0 m depth). Thus, the probability of finding groundwater at depth between 22.0 and 29.0 m on KNUST is very high. The water table elevation contour map provides a guiding framework for future drilling of boreholes on the KNUST campus.
A thesis submitted to the Department of Physics, Kwame Nkrumah University of Science and Technology, Kumasi in partial fulfilment of the requirements for the degree of MASTER OF PHILOSOPHY (GEOPHYSICS) . 2015