Application of electrical resistivity method in estimating geohydraulic properties of a sandy hydrolithofacies: a case study of Ajali Sandstone in Ninth Mile, Enugu State, Nigeria

Aleke, C. G.; Ibuot, Johnson C.; Obiora, Daniel N.

doi:10.1007/s12517-018-3638-8

Cited by 21 publications

(7 citation statements)

References 25 publications

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“…5) shows the variation across the study area. The low values of K observed in some regions may be due to the poor communication channels and geometry of the pore spaces which can affect groundwater flow in the study area (Aleke et al 2018;George et al 2018).…”

Section: Resultsmentioning

confidence: 97%

Geohydraulic study of aquifer characteristics in parts of Enugu North Local Government Area of Enugu State using electrical resistivity soundings

2020

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Geophysical survey employing vertical electrical sounding (VES) was achieved in Enugu State College of Education (Technical). Schlumberger electrode configuration was used in acquiring the data which were interpreted using the WinResist software. Four to five geoelectric layers were delineated from the interpreted results. The hydraulic parameters (hydraulic conductivity, porosity, formation factor, tortuosity and transmissivity) were estimated from the values of resistivity and thickness which are primary geoelectric parameters. The result shows the hydraulic conductivity varying from 2.71 to 70.45 m/ day, transmissivity: 49.2288-1127.944 m 2 /day, porosity: 33.71-49.44%, formation factor: 0.0014-0.0026 and tortuosity: 0.2667-0.2935. The zones with high and low values of these parameters were delineated. The potentiality of the aquifer units show moderate to high a reflection of the heterogeneity of the subsurface which is affected by the composition and geometry of the formation. The result from this study provides some important conclusions for future groundwater exploration and management.

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Section: Resultsmentioning

confidence: 97%

Geohydraulic study of aquifer characteristics in parts of Enugu North Local Government Area of Enugu State using electrical resistivity soundings

2020

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“…The vertical electrical sounding (VES) and electrical resistivity tomography (ERT) methods have been used successfully 1 3 29 Page 2 of 11 by several researchers and authors in solving a wide range of hydrological and hydrogeophysical problems including mapping of saturated aquifer horizons from the adjoining formations, groundwater potential investigations, aquifer characterisation, assessment of infiltration rate of the vadose zone and groundwater contamination studies (Stempvoort et al 1992;Samsudin et al 2009;George et al 2015b, Obiora et al 2016Lashkaripour and Nakhaei 2005;Ibuot et al 2013;Aleke et al 2018;Putranto et al 2017Putranto et al , 2018.…”

Section: Introductionmentioning

confidence: 99%

Geophysical assessment of aquifer vulnerability and management: a case study of University of Nigeria, Nsukka, Enugu State

Obiora

Ibuot

2019

Appl Water Sci

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Seventeen vertical electrical soundings and seven electrical resistivity tomography profiles were carried out at the University of Nigeria, Nsukka, Enugu State, Nigeria. The study involves the use of Schlumberger and Wenner electrodes configuration. The thrust of this work is on determining the vulnerability of the hydrogeological units by employing the aquifer vulnerability index (AVI) method. The resistivity data measured were interpreted manually and with computer software packages, which gave the resistivity, depth and thickness for each layer within the maximum current electrodes separation. The hydraulic conductivity (K) and hydraulic resistance (C) of the protective layers estimated from the primary parameters estimated have values ranging from 0.0434 to 0.4890 m day −1 and 38.37 to 1005.84 day −1 , respectively. AVI of the study shows that the study area is characterised by low to high AVI with moderate AVI as dominant. This is to help in delineating aquifer protective zones and also possible locations, which further helps in groundwater resource exploration and management.

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“…Atkins & Smith (1961) describe a cementation factor to reflect the distinctive differences in formation geometry and pore magnitudes. It also gives information on the non-connectivity between pore spaces or rise in pore communications (Aleke et al 2018;George et al 2018). The geometry factor, a, reflects the influence of the mineral grains on current.…”

Section: Theory Methods and Data Acquisitionmentioning

confidence: 99%

“…Fractional porosity (f) is a volumetric parameter calculated according to Marotz (1968) in Equation 7. Fractional porosity, according to Aleke et al (2018), is affected by the particle composition of rocks, their mode of formation and the pressures to which they are exposed. Increase in porosity reduces the electrical resistivity of a formation and has a significant effect on the cementation factor of the propagating medium.…”

Section: Theory Methods and Data Acquisitionmentioning

confidence: 99%

“…The study of groundwater repositories is important, since the movement of contaminants in the hydrogeological units is controlled by the hydrodynamic characteristics of the subsurface formation and also the geological settings. The knowledge of the flow dynamics is necessary as it can help in reducing the risk of contamination flow and also provides information that will aid in a proper groundwater management and development strategy (Abd-Elhamid & Javidi 2011; George et al 2015;Obiora et al 2016a;Aleke et al 2018). Different geophysical processing tools are available as a result of advancement in technology, and this has aided the estimation of the subsurface hydrodynamic properties, delineation of pore space geometry and heterogeneity of the aquiferous layers through the use of electrical resistivity data (Soupios et al 2007;Niwas et al 2011;Obianwu et al 2011;Ibanga & George 2016;Obiora et al 2016b;Ekanem 2020;Ezema et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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Estimating geohydrodynamic parameters and their implications on aquifer repositories: a case study of university of Nigeria, Nsukka, Enugu State

Ibuot

Obiora

2020

Water Practice and Technology

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This study employs the surface geoelectrical resistivity method to investigate the aquifer repositories by estimating the geohydrodynamic parameters; aquifer quality index (AQI), flow zone indicator (FZI), permeability, hydraulic conductivity, fractional porosity, formation factor, normalized porosity index, and tortuosity. The data were obtained from vertical electrical sounding (VES) employing Schlumberger electrode configuration across seventeen locations within the study area. The interpretation of the field data was done using computer software package known as the WINRESIST and the results gave the values of resistivity, depth and thickness of each geoelectric layer at each VES point. The values of aquifer resistivity and thickness were used to estimate the geohydrodynamic parameters, and their variation trends are shown in the contour maps. It was delineated that high permeability zone have high porosity, AQI, FZI, and hydraulic conductivity but low formation factor and tortuosity. This is a reflection of high pore connectivity and groundwater transmissibility in the aquifer repositories. The various plots illustrate the interrelationship between the parameters and gave unique information which could be employed in groundwater contamination modeling, management and abstraction.

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Application of electrical resistivity method in estimating geohydraulic properties of a sandy hydrolithofacies: a case study of Ajali Sandstone in Ninth Mile, Enugu State, Nigeria

Cited by 21 publications

References 25 publications

Geohydraulic study of aquifer characteristics in parts of Enugu North Local Government Area of Enugu State using electrical resistivity soundings

Geohydraulic study of aquifer characteristics in parts of Enugu North Local Government Area of Enugu State using electrical resistivity soundings

Geophysical assessment of aquifer vulnerability and management: a case study of University of Nigeria, Nsukka, Enugu State

Estimating geohydrodynamic parameters and their implications on aquifer repositories: a case study of university of Nigeria, Nsukka, Enugu State

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