Assessment of aquifer vulnerability in fractured rocks in the Abakaliki area, southeastern Nigeria, using geophysical and geological data

Ahmed, Jamilu Bala; Anakwuba, Emmanuel; Aigbadon, Godwin Okumagbe; Akudo, Ernest Orji; Onwa, Nneka M.

doi:10.1007/s12665-023-10851-0

Cited by 6 publications

(4 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The degree of water saturation could also influence aquifer zone resistivity (Uhlemann et al, 2017). Hence, the low resistivity in the Southwest part of the study location could also imply higher aquifer saturation in that region (Obasi et al, 2023). The aquifer thickness (Figure 3b) did not follow a definite pattern as the aquifer resistivity.…”

Section: Resultsmentioning

confidence: 89%

Estimation of aquifer parameters from electrical resistivity data and lithologs in Idah area, Northern Anambra basin, Nigeria

Obasi,

Aigbadon,

Chinyem

et al. 2024

ijs

View full text Add to dashboard Cite

The parameters of the aquifers in Idah area were characterized by integrating resistivity and litholog data. To achieve this, a total of twenty-three (23) Soundings were conducted by applying the 1-D Schlumberger resistivity array and integrating it with borehole lithologs to empirically determine the aquifer parameters in the Idah area, Northern Anambra Basin, Nigeria. The results of the analyses indicate that the aquifer zone resistivity ranges from 36.65 – 2065.31 Ωm while the aquifer thickness is between 15.60 m and 66.66 m. Its values of the longitudinal conductance (S), transverse resistance (TR), and hydraulic conductivity (k) are 0.01-1.13 mhos, 1518.90-90265.88 Ωm2 , and 0.31-13.44 m/day, respectively. The transmissivity (T) values vary from 4.88 to 2 557.78 m /day. T is inversely proportional to TR with a correlation coefficient of 0.28. The result of the reflection coefficient is in the range of -0.79 to 0.66, while that of the fractured contrast is between 0.11 and 5.06. The results suggest that an aquifer system that is predominantly fracture-based is underlying the region. Lithification and diagenesis influence the hydrological properties. The northern–central portions of the map are more suitable for groundwater exploration /exploitation than the southern/eastern ends.

show abstract

Section: Resultsmentioning

confidence: 89%

Estimation of aquifer parameters from electrical resistivity data and lithologs in Idah area, Northern Anambra basin, Nigeria

Obasi,

Aigbadon,

Chinyem

et al. 2024

ijs

View full text Add to dashboard Cite

show abstract

“…The mudstone test blocks used in the testing are gray mudstone from a certain mine, which is pure and delicate in texture, brittle in nature, with a grayish black color and a natural density of 2.02 g/cm 3 . The specific mudstone sample is as shown in Figure 1.…”

Section: Extraction Of the Parameters Of Mudstone Fissuresmentioning

confidence: 99%

“…The interaction between rocks and water has always been a hot topic of research both domestically and internationally, such as the mechanical properties of water-bearing rocks [3][4][5], the water-rock coupling seepage characteristics [6,7] and the softening mechanism of rocks when encountering water [8][9][10]. Mudstone is a common special soft rock system, and has a certain water absorption ability because its mineral composition contains a large amount of clay minerals such as kaolinite, illite and montmorillonite, and due to capillary phenomenon and the presence of internal fissures in mudstone, the fissured mudstone exhibits strong water absorption [11].…”

Section: Introductionmentioning

confidence: 99%

Study on Seepage Characteristics of Grouting Slurry for Water-Absorbing Mudstone with Rough Fissure

Chen,

Zhou,

Zhang

et al. 2024

Materials

View full text Add to dashboard Cite

Based on the computed tomography scanning, which abbreviation is CT scanning, and fractal theory, geometric parameters of mudstone fissures are obtained. The physical model of a single fissured channel is obtained in combination with Barton standard curves and 3D printing technology, and similar materials of mudstone are developed based on the water absorption of natural mudstone to prepare single fissured water-absorbing grouting test blocks with different roughness levels for the grouting simulation testing. By analyzing the viscosity change characteristics of grouting slurry before and after grouting, the seepage characteristics of the grouting slurry in the rough fissures of the water-absorbing mudstone are revealed. The results show that when the roughness is small, the grouting slurry will have an obvious water loss effect after passing through mudstone fissures. However, with the flow of the slurry, the water loss effect of the subsequent grouting slurry will be weakened. For fissures with high roughness, the water absorption properties of the rough surfaces and the walls of the mudstone fissures work together, leading to the sedimentation and blockage of the fissure channels, thereby hindering the flow of slurry.

show abstract

“…By analyzing the velocity and refraction patterns of the seismic waves, it is possible to identify geological layers and interfaces, as well as fractures, faults, and other features that affect the propagation of the waves. In fractured basalt rocks, seismic imaging can help identify the orientation and connectivity of fractures, as well as the thickness and properties of the surrounding rock (Shebl et al, 2019; Oudeika et al, 2020; Jia et al, 2023;Obasi et al, 2023). This information can be used to infer the hydraulic properties of the fractures and the surrounding rock, which are critical for understanding the ow and transport processes in the aquifer.…”

mentioning

confidence: 99%

Unraveling Flow Pathways in Fractured Basalt under Challenging Environmental Conditions: A Synergistic Approach of Electrical Resistivity Tomography and Seismic Refraction Imaging

Gemail,

Ghoneimi,

Shebl

et al. 2023

Preprint

View full text Add to dashboard Cite

The understanding of the site conceptual flow model in fractured-controlled aquifers near landfills and open dumpsites is a challenge for monitoring groundwater pollution as it answers several key issues related to environmental processes. In such hazardous environments, it is essential to define the hydrogeological processes and identify the potential pathways for contamination migration near the dumping sites. Thus, the understanding of fractured basalt characterization with suitable spatial resolution is one of the interesting issues and still open areas of research. This study investigates the potential of combining Electrical Resistivity Tomography (ERT) and Seismic Refraction Imaging (SRI) techniques for understanding a site conceptual flow model in fractured basalt under a hazardous environment. The research was conducted in an area with a history of environmental contamination, where fractured basalt serves as a major pathway for the migration of pollutants. In the considered case study, the SRI identifies a shallow water table and attests that the contact of the saturated fractured basalt (1200–1850 m/s) and the massive basalts (>3000m/s) is highly heterogeneous. In addition, the presence of NW conductive and interflow zones (5-10 Ωm) at depths of 5 to 12 m, which could provide a vertical hydraulic connection with the lower aquifer, allows the local percolation of the leachate in the area around the dumpsites. These results show the advantage of the applied approach for delineating the strikes of the prevailing fracture patterns and clarifying the pollution situation at typical composite landfills worldwide. Accordingly, the site conceptual flow model is critical for improving the understanding of hydrogeological and transport processes in such hazardous environments to achieve sustainable management of groundwater resources, as well as for the monitoring of remediation performance.

show abstract

Assessment of aquifer vulnerability in fractured rocks in the Abakaliki area, southeastern Nigeria, using geophysical and geological data

Cited by 6 publications

References 36 publications

Estimation of aquifer parameters from electrical resistivity data and lithologs in Idah area, Northern Anambra basin, Nigeria

Estimation of aquifer parameters from electrical resistivity data and lithologs in Idah area, Northern Anambra basin, Nigeria

Study on Seepage Characteristics of Grouting Slurry for Water-Absorbing Mudstone with Rough Fissure

Unraveling Flow Pathways in Fractured Basalt under Challenging Environmental Conditions: A Synergistic Approach of Electrical Resistivity Tomography and Seismic Refraction Imaging

Contact Info

Product

Resources

About