Efficacy of Geophysical Techniques for Groundwater Exploration in the Volta Basin, Northern Region of Ghana

Ewusi, Anthony; Seidu, Jamel

doi:10.4314/gm.v20i1.2

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…The Vs 30 values are then calculated using the Vs within the first 30 m depth of the traverse. Essential geotechnical parameters that aid in estimating the ability of the ground to withstand seismic impacts are then computed [24].…”

Section: Geophysical Investigation 41 Shear Wave Velocity Data Collec...mentioning

confidence: 99%

Looming Earthquake Threat in Ghana

Kafui Klu,

Nana Asare,

Seidu

et al. 2024

Earthquake Ground Motion

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The earthquake catalogue of Ghana since the first recorded earthquake and recently collected seismic data in earthquake-prone locations of the Greater Accra Region, Ghana’s capital, are covered in this chapter. This study lists the locations, periods, magnitudes, and intensities of 44 earthquakes and tremors from the past 408 years using the country’s seismic inventory. The HoliSurface approach was also utilised to conduct Multichannel Analysis of Surface Wave (MASW) surveys to collect seismic data from 22 sites in the southern Greater Accra Region’s seismically active zones. The earthquake catalogue data and geophysical data will help determine if Ghana is facing a major earthquake. This analysis shows that consistent earth tremors over the previous few years increase the risk of a devastating earthquake. The Gutenberg-Richter relations further emphasise the probabilities of a looming earthquake threat in the Ghana. The geophysical investigations also revealed areas with relatively weak subsurface materials that might contribute to more destruction in the event of an earthquake. The fundamental periods of the sites being in resonance with the buildings is also another disaster in waiting.

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Section: Geophysical Investigation 41 Shear Wave Velocity Data Collec...mentioning

confidence: 99%

Looming Earthquake Threat in Ghana

Kafui Klu,

Nana Asare,

Seidu

et al. 2024

Earthquake Ground Motion

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“…As a result of the leachate present in the subsurface, it is necessary to investigate the aquifer protective capacity, so as to know if the aquifer is strong enough to prevent the leachate from seeping through it and thereby contaminate it. The extreme efficacy and effectiveness of geophysical methods have been confirmed in areas such as groundwater probing, engineering site investigation, delineating subsurface components, archeological survey, evaluation of topsoil hydrological characteristics and foundation stability evaluation [24][25][26][27][28][29][30][31][32][33][34][35][36]. However, in this context the combined use of geophysical techniques provides an indispensable device in the profiling and assessment of leachate pollutants caused by urban landfills (domestic and/or industrial) [37][38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Investigation of subsurface contaminants leachate within Ansaru-Islam Secondary School, Ilorin, Nigeria

Suleman,

Adagunodo,

Ogunmola

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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This study adopts the use of Vertical Electrical Sounding (VES) and 2-D resistivity imaging (employing Schlumberger and Wenner array configurations) to investigate and map the extent of leachate’s migration and its possible impacts on groundwater within Abata Asunkere dumpsite, Ilorin, Kwara State. This study was inspired by the unrestrained manner of garbage dumping in the area over time, which poses great threat to the availability of clean water for the increasing populace. To delineate the subsurface, 2-D resistivity imaging data were acquired along two traverses, while the VES data were randomly acquired along the established traverses. The 2-D resistivity imaging and VES data were processed using Res2D and IPI2Win software respectively. The results of the 2-D and VES revealed five (5) geoelectric sections, which correspond to the topsoil, clayey sand, weathered basement, fractured basement and fresh basement rocks with H, QH and KH sounding signature curve types. The topsoil has layer thickness of 0.5 - 1.7 m and resistivity values ranging from 11.9 - 165 Ωm. The clayey sand has layer thicknesses between 0.7 - 2.8 m and resistivity values ranging from 20.1 - 56 Ωm. The weathered basement has thickness of 0.9 - 16.3 m and resistivity values ranging from 2.09 - 5.25 Ωm. The fractured to fresh basement has resistivity values ranging from 26.8 - 3000 Ωm with thickness ranging from 5.3 m to infinity. The third layer with low resistivity values of 2.09 - 3.52 Ωm at depth range 0.9 - 10 m is suggestive of leachate contamination. The outcome of this study indicates that some regions around the dumpsite are susceptible to leachate’s contamination, which has tendencies to permeate the unconfined aquifers in the study area if not properly monitored and controlled.

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