Contribution of electrical prospecting and spatiotemporal variations to groundwater potential in coastal hydro-sand beds: a case study of Akwa Ibom State, Southern Nigeria

George, N. J.; Agbasi, Okechukwu Ebuka; Umoh, James Anthony; Ekanem, A. M.; Ejepu, Jude Steven; Thomas, Jewel E.; Udoinyang, I. E.

doi:10.1007/s11600-022-00994-2

Cited by 13 publications

(3 citation statements)

References 69 publications

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“…These figures also include the accompanying Schlumberger array. Apparent resistivity serves as an indication when compared to the actual resistivity of the subsurface being studied (George et al, 2022). The iso-resistivity distribution refers to the resistivity distribution seen at a specific depth or electrode spacing, as depicted in these pictures.…”

Section: Resultsmentioning

confidence: 99%

Using VES and GIS-Based DRASTIC Analysis to Evaluate Groundwater Aquifer Contamination Vulnerability in Owerri, Southeastern Nigeria

Okoli,

Akaolisa,

Ubechu

et al. 2024

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This study assesses groundwater vulnerability in Owerri, Nigeria, using Vertical Electrical Sounding (VES) and Geographic Information System (GIS)-based DRASTIC modeling. The research methodology includes literature review, field survey, geological feature mapping, hydrogeological assessment, geo-electrical sounding, and data interpretation. Owerri, a rapidly developing city with flat topography and a growing population, uses the DRASTIC model to construct a groundwater vulnerability map. The model evaluates the risk of groundwater contamination using seven critical criteria, including depth to water table, net recharge, aquifer media, soil media, topography, vadose zone impact, and hydraulic conductivity. Each parameter was given a weight and rating, and the DRASTIC Index (DI) was calculated by summing the products of the weights and ratings for each factor. The results of the vulnerability assessment indicated that approximately 49% of the study area falls into the high vulnerability category, around 45% is classified as moderate vulnerability, and the remaining 6% is labeled as low vulnerability. The study reveals moderate to high vulnerability zones in Owerri, Nigeria, due to factors like lower slope terrain, permeable aquifer media, and vadose zone impact. The use of VES and GIS-based DRASTIC mapping techniques provides insights into groundwater vulnerability, aiding in sustainable resource management and environmental protection. The findings emphasize the importance of understanding potential risks and the need for effective management strategies to safeguard clean water supplies. Further research and mitigation efforts should focus on highly vulnerable areas.

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Section: Resultsmentioning

confidence: 99%

Using VES and GIS-Based DRASTIC Analysis to Evaluate Groundwater Aquifer Contamination Vulnerability in Owerri, Southeastern Nigeria

Okoli,

Akaolisa,

Ubechu

et al. 2024

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“…The VES approach was chosen for this study because it uses basic equipment, has simpler field logistics, and requires less time and resources to analyze data (Asfahani and Al-Fares 2021;de Almeida et al 2021). Several works have been documented in the literature on the effective use of the VES technique to delineate potential groundwater zones and model groundwater aquifer characteristics (Soomro et al 2019;Arunbose et al 2021;Omeje et al 2021;Oudeika et al 2021;Alarifi et al 2022;El Makrini et al 2022;George et al 2022;Gyeltshen et al 2022). In this study, the geophysical and hydrogeological parameters are interconnected since these parameters depend on the petrophysical characteristics of the aquifers.…”

Section: Introductionmentioning

confidence: 96%

“…These parameters are directly connected to aquifer parameters based on the analogy between groundwater and electrical current flow. Dar Zarrouk parameters are widely used in the hydrogeological investigation (Ait Bahammou et al 2021;Asfahani and Al-Fares 2021;Gaikwad et al 2021;Oli et al 2021;George et al 2022;Tepoule et al 2022). For instance, Rao et al (2022) combined remote sensing and Dar Zarrouk parameters to estimate the aquifer characteristics in basement terrains where fractures and weathering profiles are the only water-bearing formations.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Nubian aquifer characteristics by combining geoelectrical and pumping test methods in the Omdurman area, Sudan

Mohammed

Szabó

Szűcs

2023

Model. Earth Syst. Environ.

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The recent research is carried out to model the characteristics and productivity of the groundwater aquifer in the Omdurman area, Sudan, by combining electrical resistivity and pumping test methods. Omdurman is the most populous city known as the traditional capital of Sudan. Vertical electrical sounding (VES) survey using Schlumberger array is carried out along four profiles to delineate the potential groundwater zones. Application of 1D geophysical inversion revealed five geoelectric layers, including recent deposits, clay, silicified and ferruginous sandstone, and sandstone. Additionally, based on the outcome of VES inversion, Dar Zarrouk parameters, including transverse resistance and longitudinal conductance, were calculated to model the aquifer characteristics. The transverse resistance ranged from 5587 to 309,853 Ωm2, while the longitudinal conductance varied between 0.14 and 2.5 Ω−1. The hydraulic conductivity and transmissivity are further measured using the VES data, ranging from 1.4 to 5.2 m/d and 435 to 1564 m2/day, respectively. The step-drawdown pumping tests were performed to evaluate the aquifer characteristics and thus validate the result of the geoelectrical method. The transmissivity obtained from the step test varied between 583 and 1226 m2/day, showing an acceptable agreement with those of geoelectrical data. Based on the measured parameters, the aquifer is classified as highly productive and ideal for groundwater development. The step drawdown test was further used to assess the performance of groundwater wells. The results indicated that faulty well design and inappropriate pumping rates influence some wells in the study area, resulting in high drawdown and low well efficiency. Overall, the objectives of the study were successfully achieved; nonetheless, detailed hydrogeological and geophysical investigations are recommended for comprehensive evaluation of the groundwater aquifer.

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Groundwater potential and quality assessments of a coastal environment: a case study of the location of Federal University of Technology Ikot Abasi (FUTIA), Akwa Ibom State, Nigeria

George

Thomas

2023

J Coast Conserv

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Contribution of electrical prospecting and spatiotemporal variations to groundwater potential in coastal hydro-sand beds: a case study of Akwa Ibom State, Southern Nigeria

Cited by 13 publications

References 69 publications

Using VES and GIS-Based DRASTIC Analysis to Evaluate Groundwater Aquifer Contamination Vulnerability in Owerri, Southeastern Nigeria

Using VES and GIS-Based DRASTIC Analysis to Evaluate Groundwater Aquifer Contamination Vulnerability in Owerri, Southeastern Nigeria

Assessment of the Nubian aquifer characteristics by combining geoelectrical and pumping test methods in the Omdurman area, Sudan

Groundwater potential and quality assessments of a coastal environment: a case study of the location of Federal University of Technology Ikot Abasi (FUTIA), Akwa Ibom State, Nigeria

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