Geophysical model of geological discontinuities in a granitic aquifer: Analyzing small scale variability of electrical resistivity for groundwater occurrences

Chandra, Subash; Dewandel, Benoı̂t; Dutta, Subhrajit; Ahmed, Shakeel

doi:10.1016/j.jappgeo.2010.06.003

Cited by 59 publications

(17 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ratnakumari et al (2012) suggested that potential aquifers in weathered/fractured zones are mostly found within the traps or below it. Chandra et al (2010) explained that the geological discontinuity provides a lot of information about groundwater flow pattern and quartz reefs may provide potential groundwater zone. Muchingami et al (2012) combined VES and 2D electrical resistivity tomography to evaluate the groundwater potential in the basaltic-greenstone formations.…”

Section: Introductionmentioning

confidence: 99%

2D Electrical Resistivity Imaging for Delineation of Crystalline Basement Aquifer in Northern Ghana

Aning¹,

Sarfo²,

Mainoo³

et al. 2019

GEP

View full text Add to dashboard Cite

Lack of access to potable and adequate water is a major problem for sustainable development in northern Ghana. Developing groundwater resource is the best option for safe, reliable, and cost-efficient water supplies to these dispersed communities. In this study, nine 2D ERI profiles were carried out with the Schlumberger array in eight communities underlain by the crystalline basement rocks in the Bole District of the Savannah Region of Ghana. The aim was to delineate the aquifer zones and select points for groundwater extraction. Nine boreholes were drilled from the selected points. The yield was found to vary from 12 to 180 l/min with a depth range of 50 to 70 m. The weathered and fractured zones together with the bedrock topography were clearly marked. It is evident that the 2D electrical resistivity technique is useful tool in determining the availability of groundwater in weathered and fractured crystalline environment.

show abstract

Section: Introductionmentioning

confidence: 99%

2D Electrical Resistivity Imaging for Delineation of Crystalline Basement Aquifer in Northern Ghana

Aning¹,

Sarfo²,

Mainoo³

et al. 2019

GEP

View full text Add to dashboard Cite

show abstract

“…ERT has been extensively applied in various geological, environmental, and engineering studies to obtain 2D and 3D high-resolution images of the subsurface resistivity in complex geology at relatively shallow depths (Balakrishna et al, 2014;Chambers et al, 2010;Chandra et al, 2010;Collella et al, 2004;Pellerin, 2001;Rizzo et al, 2004). ERT involves injecting a direct or quasi-direct current into the ground through two current electrodes and measuring the resulting potentials between a separate electrode pair along the traverse, allowing the apparent resistivity measurements of the subsurface material to be obtained by using Ohm's Law (Colella et al 2004;Suski et al, 2010;Telford et al, 1990;Zhou et al, 2000).…”

Section: Ert Surveymentioning

confidence: 99%

Hydrogeological characterisation of regional faults and dolerite dykes in the Precambrian Basement and Karoo Supergroup (Tete Province, Mozambique)

Minnaar

Dippenaar

2019

South African Journal of Geology

View full text Add to dashboard Cite

Faults and dolerite dykes within Basement- and Karoo-aquifers in northern Mozambique may increase groundwater occurrence but may also be barriers to groundwater flow. Should observation boreholes drilled into regional and local faults as well as dykes show a response to aquifer testing, it would be deduced that these hydrogeological discontinuities are not barriers to groundwater flow. The approach adopted for this study included a sequential process involving data acquisition through a hydrogeological fieldwork programme consisting of geophysical surveys, borehole drilling, aquifer testing, and groundwater level monitoring. The Zambezi Border and geological contact faults were characterised by high variability in hydraulic properties. Aquifer testing resulted in drawdown in observation boreholes as well as a reduction in piezometric surface in the installed vibrating wire piezometers located in different aquifer units, indicating the Zambezi Border- and geological contact-faults were not barriers to groundwater flow. Not all the northwest-southeast trending dykes acted as barriers to groundwater flow, as there were discreet intervals with relatively high permeability present.

show abstract

“…In this research we use the geoelectric resistivity technique among other geophysical tools as it is the most relevant exploring tool for studying and depicting the subsurface aquifer in arid areas (Asfahani 2007;Yadav and Singh 2007;Chandra et al 2010). The geoelectrical resistivity techniques are depending on measuring the electrical resistivity of the subsurface substances, which give information about the different geological layers, structures and sometimes the conditions of the associated groundwater (Stewart 1982;Van Overmeeren 1989;Repsold 1990;El-Waheidi et al 1992;Nowroozi et al 1999;Meju 2005;Ibraheem et al 2016;Othman et al 2019, Ibraheem andEl-Qady 2017).…”

Section: Introductionmentioning

confidence: 99%

Hydrogeophysical study at an arid area: case study at Ayun Musa hot springs, Sinai, Egypt

El-Qady

Shanab

Omran

et al. 2020

NRIAG Journal of Astronomy and Geophysics

View full text Add to dashboard Cite

A geoelectrical resistivity survey supported by hydrochemical analysis was managed in Ayun Musa area to detect the groundwater aquifer, differentiate the subsurface layers and estimate the groundwater quality of Ayun Musa springs. A suit of 29 vertical electrical soundings (VES) of AB/2 varying from 1 up to 1000 metres were measured in the study area to achieve the goals. Water samples were collected from ten localities in the study area. Interpretation of the VESes using 1D and 2D algorithms indicates the presence of five geoelectric units of different resistivities. The main water bearing formation related to the Lower Cretaceous represented by the fifth layer and located at depth range from 205 to 256 m below the surface. On the other hand, Interpretation of hydrochemical analysis reveals that the groundwater in Ayun Musa area is brackish in nature. The sequence of the abundance of the major ions is in the following order Na + > Mg +2 > Ca +2 and Cl − > SO 4 −2 > HCO 3 −. This suggests active dissolution and ion exchange processes and the high chloride and sodium concentrations indicate a major influence by seawater. Generally, the groundwater samples in the study area are not suitable for domestic purposes.

show abstract

Geophysical model of geological discontinuities in a granitic aquifer: Analyzing small scale variability of electrical resistivity for groundwater occurrences

Cited by 59 publications

References 38 publications

2D Electrical Resistivity Imaging for Delineation of Crystalline Basement Aquifer in Northern Ghana

2D Electrical Resistivity Imaging for Delineation of Crystalline Basement Aquifer in Northern Ghana

Hydrogeological characterisation of regional faults and dolerite dykes in the Precambrian Basement and Karoo Supergroup (Tete Province, Mozambique)

Hydrogeophysical study at an arid area: case study at Ayun Musa hot springs, Sinai, Egypt

Contact Info

Product

Resources

About