Investigation of aquifer storage properties and groundwater contamination risk potential using an electrical resistivity technique: a sedimentary environment case study DOI Creative Commons
Aniekan M. Ekanem, Nyakno J. George,

Jewel E. Thomas

и другие.

Water Practice & Technology, Год журнала: 2024, Номер 19(8), С. 3350 - 3372

Опубликована: Авг. 1, 2024

ABSTRACT There are growing worries regarding sufficient supplies of safe water in Obot Akara and Ikot Ekpene Local Government Areas Akwa Ibom State. Thus, this study aims to investigate aquifer storage properties contamination risk potential using electrical resistivity techniques the two counties. The counties shown comprise 3–4 lithological successions sandy gravelly layers with slight clay intercalations. Groundwater abstraction takes place third fourth area at depths between 5.4 121.4 m. results demonstrate that aquifer's prolificacy requires a specific yield larger than 0.15 or retention less 0.15. 94% region is revealed have good groundwater for sustainability boreholes. Furthermore, show 87.5% has weak/poor protection while 12.5% moderate against infiltrating contaminants. In terms susceptibility rating, 21.9% rating remaining 78.1% low rating. identified areas adjudged moderate/high potential. These findings provide valuable guidelines formulating sustainable utilization management strategies area.

Язык: Английский

Modeling of aquifer geo-hydraulic characteristics with geo-electrical methods at a major coastal aquifer system in Uyo, southern Nigeria DOI Creative Commons
Ndifreke I. Udosen, Aniekan M. Ekanem, Nyakno J. George

и другие.

Water Practice & Technology, Год журнала: 2024, Номер 19(2), С. 611 - 628

Опубликована: Янв. 31, 2024

Abstract Characterization of aquifer geo-hydraulic properties is essential for groundwater management and conservation. This work demonstrates the use electrical resistivity surveying data in characterization important within a major coastal southern Nigeria. Geo-electrical acquired along profile lines with Schlumberger array configuration were used to determine parameters such as ρb, water ρw, porosity Φ, formation factor F, hydraulic conductivity K, transmissivity T, permeability Kp, tortuosity τ. The inversion models delineated occurrence four lithological layers, geo-layers ranging from 2.4 4,393 Ω m. Contour maps created show distribution various geo-electrical over study area. Regression curves showing relationship between generated generate empirical relationships parameters. formulas developed these will aid future seeking characterize zones model units. In all, was found be noninvasive, cost-effective, efficient method characterizing via nonpoint collected earth's surface.

Язык: Английский

Процитировано

14

Geophysical exploration to assess leachate percolation and aquifer protectivity within hydrogeological units at a major open dump in Eket, Nigeria DOI Creative Commons
Ndifreke I. Udosen, Aniekan M. Ekanem, Nyakno J. George

и другие.

Results in Earth Sciences, Год журнала: 2024, Номер 2, С. 100022 - 100022

Опубликована: Апрель 4, 2024

Leachate contamination was investigated with geo-electrical methodologies at a major open dump in Eket, Southern Nigeria. The is heavily polluted, degrades the environment, and has released toxins into atmosphere. To model leachate percolation, vertical electrical soundings (VES) resistivity tomography (ERT) surveys, constrained by well lithological information, were undertaken site. field equipment used for investigations ABEM Terrameter SAS 1000 its accessories. WINRESIST software employed to process sounding data RES2DINV generate 2D tomograms indicating subsurface heterogeneity. Results obtained from showed that had three units (motley topsoil, fine sand coarse sand), being main hydrogeological unit comprising water-bearing formations. first layer's ranged 84.9 – 625.4 Ωm mean of 360.4 Ωm; second 7.5 1008.1 142.9 Ωm, third values 11.6 745.6 205.5 Ωm. indicated percolated groundwater resources. This concerning as water resource within area. Measures Dar-Zarrouk indices reflection co-efficient highly heterogenous region moderate aquifer protective capacity potentiality. mitigate site, sanitary landfills, phyto-remediation, impermeable liners, or earth materials should be diminish rate percolation.

Язык: Английский

Процитировано

10

Geo-electrostratigraphic assessment of aquifer potential, protectivity, and pliable level of vulnerability within a coastal milieu DOI Creative Commons
Ndifreke I. Udosen, Aniekan M. Ekanem, Nyakno J. George

и другие.

Water Practice & Technology, Год журнала: 2024, Номер 19(5), С. 2010 - 2031

Опубликована: Май 1, 2024

ABSTRACT Geo-electro stratigraphic assessments of aquifer potentiality, protectivity, and pliable level vulnerability within a coastal milieu were undertaken with geo-electrical technology. The vertical electrical soundings at 20 locations the 2D resistivity tomography surveys five study area. Results obtained from these coupled hydro-geophysical investigations area indicated presence four geo-electric layers: motley topsoil, sandy clay, fine sand, coarse sand. geo-stratigraphic data assessed groundwater to contamination measures transverse resistance, hydraulic conductivity, transmissivity, diffusivity, storativity, longitudinal conductance. Geo-hydraulic characterization mean 554.6 Ωm, conductivity 0.0004 S/m, conductance 0.67 Ω−1, resistance 5601.7 Ωm2, 3.5 m/day, transmissivity 283 m2/day, storativity 0.0002, diffusivity 1 × 105 m2/day. results that region's potential ranged medium high. Longitudinal values protective capacity moderate poor. Geo-electrical technology was therefore found be an effective methodology for delineating vulnerable system.

Язык: Английский

Процитировано

8

Enhanced Contamination Risk Assessment for Aquifer Management Using the Geo-resistivity and DRASTIC Model in Alluvial Settings DOI Creative Commons
Nyakno J. George, Okechukwu Ebuka Agbasi,

A.J Umoh

и другие.

Cleaner Water, Год журнала: 2024, Номер unknown, С. 100060 - 100060

Опубликована: Дек. 1, 2024

Язык: Английский

Процитировано

6

Aquifer vulnerability valorization via DRASTIC index-based assessment within litho-facies of a coastal environment DOI Creative Commons
Ndifreke I. Udosen, Nyakno J. George, Aniekan M. Ekanem

и другие.

Results in Earth Sciences, Год журнала: 2024, Номер 2, С. 100033 - 100033

Опубликована: Июль 9, 2024

Determining the degree of an aquifer's susceptibility to pollutants is important tool for policy planning in subterranean water administration and conservation. In this work, vulnerability was appraised with use DRASTIC methodology, which employs seven parameters: depth groundwater (D); net recharge (R); aquifer media (A); soil (S); topography (T); influence vadose zone (I); hydraulic conductivity (C). Different ratings were given each parameter based on hydro-geological geo-electrical information obtained from study area. Geo-electrostratigraphic data acquired vertical electrical soundings resistivity tomography surveys. The results demonstrated existence geoelectrical layers variable resistivities ranging high low, curve types. Longitudinal conductance measures indicated moderate protective capacity. Analysis indices showed that contamination. Vulnerability maps generated indicate locations vulnerability, goal being prevent indiscriminate haphazard wildcat abstraction such locations. quality category index (QCI) model underground susceptivity dependent all 7 parameters employed model, most critical determinants (D), (R), (A), impact (I). work recommends anthropogenic activities could contaminate resource be halted as by models vulnerable.

Язык: Английский

Процитировано

3

Geophysical assessment of aquifer protectivity, groundwater potential and flow dynamics in Northern Akwa Ibom State, Nigeria: Implications for sustainable freshwater management DOI Creative Commons
Emem O. Ikpe, Aniekan M. Ekanem, Nyakno J. George

и другие.

Geosystems and Geoenvironment, Год журнала: 2025, Номер unknown, С. 100401 - 100401

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0

Zonation of coastal geo-electrostratigraphic units via Stratigraphic Modified Lorenz Plots and rock typing DOI Creative Commons
Ndifreke I. Udosen

Results in Earth Sciences, Год журнала: 2025, Номер unknown, С. 100099 - 100099

Опубликована: Май 1, 2025

Язык: Английский

Процитировано

0

Georesistivity assessment of lithological and hydrodynamic factors in groundwater sanitation of Akwa Ibom river channel aquifer system DOI Creative Commons
Nyakno J. George,

KufreRichard Ekanem,

Aniekan M. Ekanem

и другие.

Geosystems and Geoenvironment, Год журнала: 2025, Номер unknown, С. 100411 - 100411

Опубликована: Май 1, 2025

Язык: Английский

Процитировано

0

GOD - and DRASTIC - based valuation of groundwater vulnerability to contamination of hinterland aquifers of northern part of Akwa Ibom State, Nigeria DOI Creative Commons
Emem O. Ikpe, Aniekan M. Ekanem, Nyakno J. George

и другие.

Results in Earth Sciences, Год журнала: 2025, Номер unknown, С. 100104 - 100104

Опубликована: Май 1, 2025

Язык: Английский

Процитировано

0

Litho-stratigraphic characterization of hydrogeological and hydraulic flow units via electrical resistivity, Stratigraphic Modified Lorenz Plots, and flow zone indicator models DOI Creative Commons
Ndifreke I. Udosen, Aniekan M. Ekanem, Nyakno J. George

и другие.

Solid Earth Sciences, Год журнала: 2024, Номер 9(3), С. 100191 - 100191

Опубликована: Июль 30, 2024

Litho-stratigraphic characterization within hydrogeological units of a major aquifer system in Southern Nigeria was carried out using Electrical Resistivity (ER), Stratigraphic Modified Lorenz Plots (SMLP), and Flow Zone Indicator (FZI) algorithms. The aim integrating these technologies to generate hydraulic flow (HFU) that would describe the speed efficiency aquifer's stratigraphic units. technology delineated four geoelectric layers study area: motley topsoil, coarse sand, fine sandy clay, with aquiferous formation being third layer. Via measures obtained from geo-electrical data, geo-hydraulic parameters were estimated. conductivity ranged 3.1 x 10−5 9.3 m/s, effective porosity 0.33 0.54, permeability 4362.9 13143.4 mD, tortuosity 0.85 0.97, Aquifer Quality Index (AQI) values 3.57 4.88 4.11 7.00. presence three region. first zone superconductor good ranking; second zones conductors having fair rankings. Results employed Discrete Rock Typing (DRT) results which indicated two distinct rock matrix types. Dykstra-Parson co-efficient, evaluation heterogeneity, gave value unity, indicating perfect heterogeneity aquifer.

Язык: Английский

Процитировано

3