Investigation of Geophysical Signatures for Successful Exploration of Groundwater in Highly Indurated Sedimentary Basins: A Look at the Nasia Basin, NE Ghana

Aliou, Abdul-Samed; Dzikunoo, Elikplim Abla; Yidana, Sandow Mark; Loh, Yvonne Sena Akosua; Chegbeleh, Larry Pax

doi:10.1007/s11053-022-10125-9

Cited by 7 publications

(6 citation statements)

References 33 publications

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“…The IPI2win divides the VES field curves into different segments by adopting a curve fitting technique to signify changing resistivity shift vs. depth [72]. The differential resistivity is attributed to lithology assigning different resistivity values based on porosity, permeability, water chemistry, depth, and thickness of subsurface geological units [20][21][22][23][24][25][26][27][28][29][30][31][32][33]. A total of 23 GELS has been drawn showing different horizons to indicate aquifer potential having maximum probability of groundwater.…”

Section: Geoelectrical Litho Section (Gels)mentioning

confidence: 99%

“…The best aquifer horizon is present in the form of sandy clay having a depth of ≥15-≤100 m for VES-11, ≥60-≤400 m for VES-10, and ≥10-≤200 m for VES-01. The shallow aquifers are present in the form of clayey sand with an average depth of ≥1.5-≤60 m. The aquifers present there are mostly unconfined having maximum discharge and recharge due to the presence of a considerable amount of sand [23,80,81].…”

Section: Pseudosection Of Apparent Resistivitymentioning

confidence: 99%

“…Geoelectrical methods are widely utilized for the exploration of groundwater resources, as the geoelectrical properties are related to groundwater properties, lithology, chemistry, and porosity [20][21][22][23]. The geoelectrical resistivity method is a cost-effective and easily accessible method for evaluating groundwater before investing in drilling [22,24].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Potential Potable Water Reserves in Islamabad, Pakistan Using Vertical Electrical Sounding Technique

Rashid,

Kamran,

Zeb

et al. 2023

Hydrology

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This study aimed to investigate the potential reserves of potable water in Islamabad, Pakistan, considering the alarming depletion of water resources. A detailed vertical electrical sounding (VES) survey was conducted in two main localities: Bara Kahu (Area 1) and Aabpara to G-13 (Area 2), based on accessibility, time, and budget constraints. A total of 23 VES measurements were performed, with 13 in Area 1 and 10 in Area 2, reaching a maximum depth of 500 m. Geologs and pseudosections were generated to assess lithological variations, aquifer conditions, and resistivity trends with depth. Statistical distribution of resistivity (SDR), hydraulic parameters, true resistivity, macroanisotropy, aquifer depth and thickness, and linear regression (R2) curves were calculated for both areas, providing insights into the aquifer conditions. The results revealed that the study areas predominantly consisted of sandy lithology as the aquifer horizon, encompassing sandstone, sandy clay, and clayey sand formations. Area 2 exhibited a higher presence of clayey horizons, and aquifers were generally deeper compared to Area 1. The aquifer thickness ranged from 10 m to 200 m, with shallow depths ranging from 10 m to 60 m and deeper aquifers exceeding 200 m. Aquifers in Area 1 were mostly semi-confined, while those in Area 2 were predominantly unconfined and susceptible to recharge and potential contamination. The northwest–southeast side of Area 1 exhibited the highest probability for ground resource estimation, while in Area 2, the northeast–southwest side displayed a dominant probability. The study identified a probable shear zone in Area 2, indicating lithological differences between the northeast and southwest sides with a reverse sequence. Based on the findings, it is recommended that the shallow aquifers in Area 1 be considered the best potential reservoir for water supply. In contrast, deeper drilling is advised in Area 2 to ensure a long-lasting, high-quality water supply. These results provide valuable information for water resource management and facilitate sustainable water supply planning and decision making in Islamabad, Pakistan.

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Section: Geoelectrical Litho Section (Gels)mentioning

confidence: 99%

Section: Pseudosection Of Apparent Resistivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment of Potential Potable Water Reserves in Islamabad, Pakistan Using Vertical Electrical Sounding Technique

Rashid,

Kamran,

Zeb

et al. 2023

Hydrology

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“…On the other hand, Geophysical well logging offers a unique opportunity to attain a more comprehensive understanding of the aquifer system as it gives a continuous estimation of the aquifer characteristics 10 – 13 . The petrophysical and hydraulic parameters can be obtained by analyzing well-logging data using deterministic and inverse modeling 14 – 17 . However, formulating the mathematical problem that relates the hydrogeological parameters to the measured geophysical data is often complex and associated with a high uncertainty 18 , 19 .…”

Section: Introductionmentioning

confidence: 99%

Assessing heterogeneous groundwater systems: Geostatistical interpretation of well logging data for estimating essential hydrogeological parameters

Mohammed,

Flores,

Szabó

et al. 2024

Sci Rep

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This research presents an unsupervised learning approach for interpreting well-log data to characterize the hydrostratigraphical units within the Quaternary aquifer system in Debrecen area, Eastern Hungary. The study applied factor analysis (FA) to extract factor logs from spontaneous potential (SP), natural gamma ray (NGR), and resistivity (RS) logs and correlate it to the petrophysical and hydrogeological parameters of shale volume and hydraulic conductivity. This research indicated a significant exponential relationship between the shale volume and the scaled first factor derived through factor analysis. As a result, a universal FA-based equation for shale volume estimation is derived that shows a close agreement with the deterministic shale volume estimation. Furthermore, the first scaled factor is correlated to the decimal logarithm of hydraulic conductivity estimated with the Csókás method. Csókás method is modified from the Kozeny-Carman equation that continuously estimates the hydraulic conductivity. FA and Csókás method-based estimations showed high similarity with a correlation coefficient of 0.84. The use of factor analysis provided a new strategy for geophysical well-logs interpretation that bridges the gap between traditional and data-driven machine learning techniques. This approach is beneficial in characterizing heterogeneous aquifer systems for successful groundwater resource development.

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“…The escalation of water investigation research is attributed to its growing significance in shaping developmental strategies across various domains, including industry and agriculture (Aliou et al, 2022;Zhou et al, 2022;Liu et al, 2023). The rapid population growth has led to the evolution of groundwater exploration methodologies for the characterization of local and regional aquifer systems (Adagunodo et al, 2018;Rabeh et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Investigation of petrophysical and hydrogeological parameters of the transboundary Nubian Aquifer system using geophysical methods

Mohammed,

Mohamed,

Szabó

et al. 2024

Front. Earth Sci.

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The recent research aims to investigate the petrophysical and hydrogeological parameters of the Nubian aquifer system (NAS) in Northern Khartoum State, Sudan, using integrated geophysical methods, including surface electrical resistivity and geophysical well-logging. The Nubian aquifer is a transboundary regional aquifer that covers vast areas in Sudan, Egypt, Libya and Chad. The well-logs, including self-potential (SP), natural gamma ray (GR), and long normal resistivity (RS), are integrated with Vertical Electrical Sounding (VES) measurements to delineate the hydrostratigraphical units. As a result, two aquifers are detected. An upper aquifer comprises coarse sand with an average thickness of 50 m and a lower aquifer of sandstone with more than 200 m thickness. For a thorough evaluation of the aquifers, in the first stage, the petrophysical and hydrogeological parameters, including formation factor, total and effective porosity, shale volume, hydraulic conductivity, and transmissivity, are measured solely from geophysical well-logs. In the second step, the results of geophysical well logs are combined with VES and pumping test data to detect the spatial variation of the measured parameters over the study area. As a result, the hydraulic conductivity of the Nubian aquifers ranged from 1.9 to 7.8 m/day, while the transmissivity varied between 120 and 733 m2/day. These results indicated that the potentiality of the Nubian formation is high; however, in some regions, due to the sediment heterogeneity, the aquifers have intermediate to high potential. According to the obtained results, it can be concluded that the Nubian Aquifer in Khartoum state is ideal for groundwater development. This research discovered that geophysical approaches can be used to characterize moderately heterogeneous groundwater systems by comparing the Nubian aquifer with similar aquifer systems that have similar hydrogeological settings. This study emphasized the application of universal principles in extrapolating hydraulic parameters in hydrogeophysical surveys. This approach aims to reduce the costs and efforts associated with traditional hydrogeological approaches.

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Investigation of Geophysical Signatures for Successful Exploration of Groundwater in Highly Indurated Sedimentary Basins: A Look at the Nasia Basin, NE Ghana

Cited by 7 publications

References 33 publications

Assessment of Potential Potable Water Reserves in Islamabad, Pakistan Using Vertical Electrical Sounding Technique

Assessment of Potential Potable Water Reserves in Islamabad, Pakistan Using Vertical Electrical Sounding Technique

Assessing heterogeneous groundwater systems: Geostatistical interpretation of well logging data for estimating essential hydrogeological parameters

Investigation of petrophysical and hydrogeological parameters of the transboundary Nubian Aquifer system using geophysical methods

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