Estimation of Water Table Depths and Local Groundwater Flow Pattern using the Ground Penetrating Radar

Abstract- Estimation of groundwater table by hydrogeologists in Ghana over the past decades has proven to be difficult due to the dearth of data on piezometric heads from the very few boreholes present to access this data. The importance of this information in infrastructure planning therefore calls for the need to establish a precise geophysical method that can predict the depth to the water table at a relatively lower cost and higher efficiency as compared with prevailing conventional methods. This paper demonstrates how the ground based ground penetrating radar (GPR) has been successfully used to delineate water table depths and possible ground water flow directions. The MALA GPR equipment with unshielded rough terrain antenna of 25 MHz central frequency in the common offset mode was employed for the data collection. Data was taken along 21 profiles with inter-profile separation of 50 m over the study site of areal extent