scholarly journals Integrating Resistivity Techniques for Optimum Groundwater Exploration and Development within a Hotel Facility in Osogbo, Southwestern Nigeria

2021 ◽  
Vol 25 (2) ◽  
pp. 233-238
Author(s):  
A. Ojo ◽  
E. Babafemi ◽  
E. Faleye ◽  
O. Shado
Keyword(s):  
Groundwater Potential ◽  
Groundwater Exploration ◽  
Vertical Electrical Sounding ◽  
Computer Assisted ◽  
Curve Matching ◽  
Southwestern Nigeria ◽  
Low Resistivity ◽  
Lateritic Clay ◽  
Top Soil ◽  
Electrical Sounding

This work is an attempt to combine dipole-dipole profiling and vertical electrical sounding techniques of electrical resistivity methods to investigate the groundwater potential within the premises of a 3-star hotel facility in Osogbo, Nigeria by delineating the geoelectric layers, delineating the low resistivity layers, determining the lithologies and hence, delineating the groundwater bearing zones. The five vertical electrical sounding data were collected along two pre-surveyed dipole-dipole traverses at right angle to each other beside the fences of the premises using the ABEM SAS 300c terrameter. The observed data were interpreted quantitatively using curve matching and computer-assisted iteration method using the WinResist and Dipro software. The results of the inversion show that the lithology comprises of the top soil and an intermittent sequence of sand and lateritic clay having varying resistivity and thickness. The aquiferous layer was observed to be located at a depth of 23 m to 25 m due to the low resistivity and high thickness of the aquiferous layer. The result of the 2-D imaging closely correlates with the result of the vertical electrical sounding. Thus, combining these techniques in groundwater investigation has achieved similar result as the Werner technique and has reduced ambiguity and error in positioning for drilling. Keywords: Resistivity, Groundwater Exploration, Dipole-Dipole

scholarly journals Geoelectrical Investigation of Subsurface Structures for Mapping Groundwater Potential of Joseph Ayo Babalola University Campus Environment, Ikeji Arakeji, Osun State, Southwestern Nigeria

2019 ◽  
pp. 1-12
Author(s):  
O. E. Odeyemi ◽  
O. M. Odeyemi ◽  
S. A. Owolabi ◽  
E. A. Mamukuyomi ◽  
R. A. Salako
Keyword(s):  
Electrode Array ◽  
Groundwater Potential ◽  
Vertical Electrical Sounding ◽  
Electrode Spacing ◽  
Clayey Sand ◽  
Southwestern Nigeria ◽  
Current Electrode ◽  
Campus Environment ◽  
Lateritic Clay ◽  
Electrical Sounding

Owing to fast increase in number of staff and students of Joseph Ayo Babalola University, Ikeji Arakeji, Southwestern Nigeria, it is therefore very important to carry out this research in order to recommend the actual locations where boreholes can be sunk for good potential yields of groundwater when the time comes. The aim of this research is to carry out vertical electrical sounding geophysical survey at study area with a view to determining good aquifers that are good for the accumulation of groundwater. The study area is located between latitude 0820225 m to 0820345 m (UTM) Northings and longitude 717320 m to 717450 m (UTM) Eastings. Schlumberger electrode array was employed for the study using Ohmega Resistivity meter for the data acquisition. The geoelectric survey of the study area comprised of twelve vertical electrical soundings, with maximum current electrode spacing (AB) of 100 m. The modeled curves are mainly KH-type. The geoelectric sections generated from the sounding curves revealed 4 major layers earth models. The topsoil is made up of clay, clayey sand/lateritic sand with resistivity and thicknesses varying from 54.7 – 210.1ohm-m and 0.2 –0.8m respectively. The second layer is the lateritic clay with resistivities and thicknesses varying from 334 – 963ohm-m and 1.5 – 10.8m respectively. The third layer constitutes the clay / sandy fractured quartzite and it serves as the aquifer unit. The resistivity values lie between 71.7 and 498 ohm-m while the thicknesses vary from 2.1 – 76.3 m. The fourth layer is the fractured/presumably fresh basement bedrock with the resistivity varying from 1879 – 13991.8 ohm-m. Areas characterized with fractured basement of low resistivity with appreciable thickness are therefore recommended for the siting of boreholes. It is concluded that the vertical electrical sounding points of the study area are good aquifers for groundwater accumulation.

scholarly journals Application of vertical electrical sounding (VES) for groundwater exploration in Onitsha and environs, Nigeria

2016 ◽  
Vol 4 (1) ◽  
pp. 1 ◽  
Author(s):  
Chika Osele ◽  
Ajana Onwuemesi ◽  
Emmanuel Anakwuba ◽  
Augustine Chinwuko
Keyword(s):  
Groundwater Potential ◽  
Groundwater Exploration ◽  
Vertical Electrical Sounding ◽  
Anambra State ◽  
Array Configuration ◽  
Sustainable Water Supply ◽  
Groundwater Yield ◽  
Electrical Sounding ◽  
Aquifer Characteristics ◽  
Water Saturated

<p>Surface geo-electrical survey using vertical electrical sounding (VES) method has been carried out in Onitsha and environs in southwestern part of Anambra state in order to determine the aquifer characteristics and groundwater potential of the area. Eleven vertical electrical soundings were carried out within the area of study using schlumberger array configuration. The interpretation of the vertical electrical sounding (VES) data revealed three to five geoelectric units with depth to the aquiferous layers ranging from 21 to 78m and resistivity of the saturated layers varying between 20 and 5600 ohm-m. Aquifer characteristics such as transmissivity and hydraulic conductivity calculated from interpretated VES result ranged from 2.55m2/day to 29.01m2/day and 0.03m/day to 1.37m/day respectively. This result shows that the water saturated sandstone units of the study area is hydrological good and capable of producing optimum groundwater yield. Furthermore, borehole could be drilled at depth between 40 and 110m in the area for sustainable water supply and hydrochemical study carried out to determine the water quality for domestics and municipal purposes.</p>

scholarly journals Groundwater Prospecting Using Combined Vertical Electrical Sounding and Borehole Performance

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
S.O Oyegoke ◽  
A.S Adebanjo ◽  
O.O Fayomi ◽  
O. Obot
Keyword(s):  
Specific Capacity ◽  
Electrode Array ◽  
Data Interpretation ◽  
Pumping Test ◽  
Vertical Electrical Sounding ◽  
Computer Assisted ◽  
Current Electrode ◽  
Top Soil ◽  
Weathered Layer ◽  
Electrical Sounding

This study aimed to determine the prospect of groundwater in Afe Babalola University, Ado-Ekiti(ABUAD); result of which will inform of the possibility of getting sufficient water underground. Geophysical survey was carried out in the study area and complemented with performance of an existing borehole. The survey involved 1-D Vertical Electrical Sounding (VES) utilizing the Schlumberger electrode array with half-current electrode separation (AB/2) that ranged from 1m to 50m. The VES data interpretation involved partial curve matching and computer assisted 1-D forward modeling using IPI 2 WIN software. The results showed the subsurface to have 3-layer earth strata comprising of sandy-clay top soil up to 3.26m deep, weathered/fractured basement in the next 9.06m depth and then, the fresh basement with the weathered layer constituting the main aquifer unit. The resistivity values of the weathered and fractured basement are 174 and 192 ohmm indicating relatively low potential for groundwater resource. Pumping test on a nearby borehole gave specific capacity of 7.95m2/day which depicts a low to intermediate transmissivity conforming to the VES.

scholarly journals Aeromagnetic and electrical resistivity mapping for groundwater development around Ilesha schist belt, southwestern Nigeria

2021 ◽  
Author(s):  
Cyril Chibueze Okpoli ◽  
Blessing omobolanle Akinbulejo
Keyword(s):  
Data Interpretation ◽  
Groundwater Potential ◽  
Vertical Electrical Sounding ◽  
Groundwater Prospect ◽  
Lineament Density ◽  
Geological Structures ◽  
Southwestern Nigeria ◽  
High Tendency ◽  
Electrical Sounding ◽  
Image Enhancing

AbstractAeromagnetic and vertical electrical sounding around Ijano, southwestern Nigeria, was investigated for groundwater potential. Aeromagnetic dataset and vertical electrical sounding were acquired and used to investigate the study area. Oasis Montaj, Microsoft Excel and Arc GIS were used to present the results in maps, images and profiles. In order to map out the geological structures of the study area, magnetic image enhancing filters applied to the total magnetic intensity using Geosoft (Oasis Montaj) are reduction to equator, vertical derivative, total horizontal derivative and upward continuation. These filters helped define the lithological boundaries, geological structures, faults, folds and contacts. The lineament of aeromagnetic map was generated from derived field intensity gradients and solutions of Euler deconvolution carried out on the aeromagnetic data using structural index of 0.5 and 1. The processed image shows the lineaments trends majorly towards NE–SW directions. From these combined results of the study area, consistent aeromagnetic lineament map was generated showing the probable positions and trends of the suspected fractured/faulted zone as well as other basement structures. Hydro-lineament density maps based on lineament were produced from the generalized structure trends in the area. The result from the depth sounding data interpretation indicates three curve types which are H, HA and KH, where curve type H has the highest occurrence. The results from the vertical electrical sounding data revealed that the areas with the highest hydro-lineament density are good for groundwater prospect and development. The study has led to the delineation of areas where groundwater occurrences are most promising for sustainable supply, suggesting that an area with high concentrations of lineament density has a high tendency for groundwater prospecting. The results from the study show that the aeromagnetic technique is capable of extracting lineament trends in an inaccessible tropical forest.

scholarly journals Modeling of Groundwater Potential Using Vertical Electrical Sounding (VES) and Multi-caterial Analysis at Omitogun Housing Estate, Akure, Southwestern Nigeria

2018 ◽  
pp. 1-11
Author(s):  
Adebo A. Babatunde ◽  
Ilugbo Stephen Olubusola ◽  
Oladetan Folorunso Emmanuel
Keyword(s):  
Structural Features ◽  
Groundwater Potential ◽  
Vertical Electrical Sounding ◽  
Groundwater Prospect ◽  
Groundwater Potential Zones ◽  
Southwestern Nigeria ◽  
Entire Study ◽  
Potential Map ◽  
Electrical Sounding ◽  
Groundwater Potential Map

A geoelectric investigation of groundwater prospect at Omitogun Estate, along Benin/Ilesha express way Akure, within the basement complex of southwestern Nigeria was carried out with a view to providing information on the geoelectric characteristic of the subsurface sequence, bedrock topography, subsurface structural features and their hydrogeologic significance, in order to identify aquifer units and determine possible areas for groundwater potential zones. The study involved the use of Schlumberger vertical electrical sounding data at thirty (30) stations. The vertical electrical sounding data presented as field curves were interpreted quantitatively by partial curve matching method and computer iteration technique. Fracture resistivity map, aquifer resistivity map, aquifer thickness map and overburden thickness map were generated from the results. Groundwater potential map was also generated from the integration of these maps using multi-criteria decision analysis (MCDA). The study area has been classified into low, medium, high groundwater potential zones and the results from well data across the entire study area were used to validate the accuracy of the groundwater potential map. From the results obtained, it could be concluded that the study area is generalized to be of low groundwater potential.  

scholarly journals Groundwater exploration using Vertical Electrical Sounding (VES) Method at Toro Jaya, Langgam, Riau

2018 ◽  
Vol 3 (4) ◽  
pp. 226
Author(s):  
Adi Suryadi ◽  
Dewandra Bagus Eka Putra ◽  
Husnul Kausarian ◽  
Budi Prayitno ◽  
Reza Fahlepi
Keyword(s):  
Data Acquisition ◽  
Research Area ◽  
Unconfined Aquifer ◽  
Groundwater Exploration ◽  
Vertical Electrical Sounding ◽  
Confined Aquifer ◽  
Low Resistivity ◽  
Value Range ◽  
Electrical Sounding ◽  
Clay Layers

Vertical Electrical Sounding (VES) method is one of many methods in geophysics that was conducted in this research at Toro Jaya, Langgam, Riau. The aim of this research is to investigate and locate the depth of groundwater layer (aquifer). Data acquisition of VES was carried out using GEOCIST with Schlumburger configuration of electrode. There are four VES point in this research with various length of cable ranging from 135 m up to 200 m. From four VES point shown two different of resistivity value range. Very low resistivity value with range 0,34 – 0,9 Ωm interpreted as aquifer layer. The aquifer layer of research area divided into two types which are unconfined aquifer and confined aquifer. Meanwhile, another resistivity value ranging from 1,69 – 7  Ωm was interpreted as clay layers.

scholarly journals GEOPHYSICAL INVESTIGATION OF GROUNDWATER POTENTIAL OF A SITE IN OBALE AREA OF AKURE, NIGERIA.

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Eebo Festus Olusola ◽  
Yusuf Gbenga Ayodele
Keyword(s):  
Soil Layer ◽  
Groundwater Potential ◽  
Clay Layer ◽  
Geophysical Investigation ◽  
Southwestern Nigeria ◽  
Geoelectric Section ◽  
Lateritic Clay ◽  
Top Soil ◽  
Geoelectric Layer ◽  
A Site

Electrical Resistivity method using Vertical Electrical Soundings (VES) were carried out at a site in Aba-Oyo area FUTA Southgate area, Akure, Nigeria, with the aim to access groundwater potential of the site. The study area is underlain by crystalline rocks of the Precambrian basement complex of the Southwestern Nigeria. Twelve (12) VES were carried out using Schlumberger electrode array configuration with AB/2from 1 to 65m. The VES data generated were processed and interpreted using partial curve matching method and computer iteration techniques. The interpreted data revealed three to four geoelectric sections with varied thicknesses and resistivity. The top soil layer ranges from 44 to 181?m, lateritic clay layer ranges from 20 to 174?m, the weathered horizon resistivity ranges from 20.0 to 424.0?m while the competent rock/fresh rock has resistivity values greater than 424.0.3?m. The top soil layer resistivity and thickness ranges from 44 to 181?m and 0.4 to 2m, the lateritic clay layer resistivity and thickness range from 20 to 174?m and 1.7 to 6.0m respectively, the weathered horizon resistivity ranges from 20.0 to 424.0?m and 1.4 to 7.4m respectively while the competent rock has resistivity values greater than 424.0?m and ?m respectively. The third geoelectric layer constitutes the aquiferous zone in the 4-layer geoelectric section while the second geoelectric layer is the aquiferous zone in all the 3- layer geoelectric sections. VES station 2, 7, 9 stations shows good groundwater potential as revealed by the thick overburden and weathered layer with low resistivity values. VES stations 1, 4, 5, 6, 8, 10 and 12 shows moderate groundwater potentials while VES stations 3 and 11 are non-aquifereous in nature.

EVALUATION OF GROUNDWATER POTENTIAL OF ODEDA LOCAL GOVERNMENT AREA, OGUN STATE, SOUTHWEST NIGERIA

2017 ◽  
Vol 15 (1) ◽  
pp. 70-81
Author(s):  
V MAKINDE ◽  
A O ERUOLA ◽  
S A GANIYU ◽  
O T OLURIN ◽  
O O ADELEKE ◽  
...  
Keyword(s):  
Local Government ◽  
Electrode Array ◽  
Groundwater Potential ◽  
Local Government Area ◽  
Vertical Electrical Sounding ◽  
Groundwater Potential Zone ◽  
Potential Zone ◽  
Southwestern Nigeria ◽  
Ogun State ◽  
Electrical Sounding

Evaluation of groundwater potential in Odeda Local Government Area, Ogun State, Southwestern Nigeria, has been carried out in this study using Vertical Electrical Sounding method. The study area is underlain by Precambrian Basement Complex rocks of Southwestern Nigeria. These rocks are inher-ently characterized by low porosity and permeability. The interpretation of thirty (30) vertical electrical sounding (VES) conducted using the Schlumberger electrode array shows four geo-electric layers in the subsurface within the study area. The overburden thickness varies from 5.9 to 39 m across the study area. This was used to prepare the groundwater potential map which assisted in the zoning of the area into low, medium and high groundwater potential zones. The study showed that about 60% of the study area falls within the low/medium rated groundwater potential zone while the remaining 40% constituted the high groundwater potential zone. Hence, the groundwater potential rating of the area is generally low.

scholarly journals Groundwater prospecting using the dipole-dipole configuration for vertical electrical sounding: prediction of major aquifer depth in the Tolon-Kumbungu district of Northern Ghana

2019 ◽  
Vol 37 (2) ◽  
pp. 43-58
Author(s):  
A. N. Mumuni ◽  
J. S. Bayor
Keyword(s):  
Low Cost ◽  
Groundwater Potential ◽  
Groundwater Exploration ◽  
Vertical Electrical Sounding ◽  
Northern Ghana ◽  
Fracture Zones ◽  
Geophysical Investigation ◽  
Electrical Sounding ◽  
Dipole Configuration ◽  
Groundwater Prospecting

A geophysical investigation in groundwater prospecting, using the vertical electrical sounding (VES) method in resistivity surveying, was undertaken in the Tolon-Kumbungu district of Northern Ghana. The aim was to evaluate the effectiveness of the VES technique as a low-cost groundwater exploration method. Using the dipole-dipole VES technique, fracture zones that held good prospects for groundwater location were prospectively identified at 15 sites in the Gbullung and Wayamba communities of the district. In addition, retrospective VES data for 6 sites were obtained from previous studies. Geophysical VES data and available drill logs for 3 sites in the prospective study and all 6 sites in the retrospective study (a total of 9 sites) were then evaluated by the VES log-log graph interpretation method to establish a correlation with the groundwater characteristics of the study area. The analyses of the VES curves indicated the presence of anomalous fracture zones occurring within hard sandstone formations that had high groundwater potential. Weathered zones or fresh rock aquifers however did not show potential for groundwater. The dominant formations in the area were found to be thin-bedded sequences of sandstone, mudstone, shale, siltstone and their intercalations. Groundwater was confined to between the depths of 25.0 m and 40.0 m, with major aquifers occurring approximately between the depths of 34.0 m and 45.0 m. These predictions were confirmed by the available drill logs. Using the VES curve interpretation as a means of selecting promising water-bearing sites, 8 out of the 9 sites drilled were successful wells, recording water yields ranging from 14 L/min to 250 L/min, with an average yield of 87.3 L/min. The study thus showed that the dipole-dipole VES technique in groundwater prospecting is effective for the geology of the study area. Keywords: Tolon-Kumbungu; vertical electrical sounding; aquifer; groundwater; apparent resistivity 

scholarly journals Geoelectric Investigation of the Groundwater Potential of the Federal Housing Estate, Eastern Part of Ado-Ekiti, Southwestern Nigeria

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Olayiwola G Olaseeni ◽  
Ajibola Oyebamiji ◽  
Oluwaseun Olaoye ◽  
Bosede Ojo ◽  
Ayokunle Akinlalu
Keyword(s):  
Subsurface Layer ◽  
Groundwater Potential ◽  
Vertical Electrical Sounding ◽  
Southeastern Part ◽  
Southwestern Nigeria ◽  
Type Curves ◽  
Overburden Thickness ◽  
Weathered Layer ◽  
Electrical Sounding ◽  
Matching Techniques

This study aimed at evaluating the potential for groundwater development in the eastern part of Ado-Ekiti, Southwestern Nigeria using Vertical Electrical Sounding (VES). Data were acquired with ABEM SAS 300 and processed through partial curve matching techniques and assisted with 1-D forward modelling. Geoelectric parameters were determined from the VES interpreted result. Seven (7) different VES type curves (H, A, HA, KH, HK, QH and HKH) indicating inhomogeneity of the subsurface layer beneath the study area were observed. Weathered layer resistivity map having values ranging from 3.2 – 272 Ωm, overburden thickness of value vary between 0 and 28m and  bedrock relief values range from 360 – 480 m were delineated. It was estimated from the result that the northwestern and southeastern part which constituted about 15%of the study area possess high groundwater potential while the remaining 85% of the study area exhibit low/moderate potentials for yielding substantial water. Hence, the groundwater potential rating of the area was considered generally low.Keywords- Geoelectric, Groundwater potential, Overburden thickness, Vertical Electrical Sounding

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