scholarly journals INTEGRATED GEOPHYSICAL MAPPING OF GROUNDWATER AQUIFER FOR SPATIAL DISTRIBUTION OF GROUNDWATER DEVELOPMENT IN IPERINDO AND ITS ENVIRONS, SOUTHWESTERN NIGERIA

2021 ◽  
Vol 5 (2) ◽  
pp. 59-66
Author(s):  
Kazeem O.Olomo ◽  
Oluwatoyin K. Olaleye ◽  
Temitayo O. Ale ◽  
Michael T. Asubiojo ◽  
Oluyemi E. Faseki
Keyword(s):  
Spatial Distribution ◽  
Groundwater Potential ◽  
Groundwater Development ◽  
Groundwater Prospect ◽  
Southwestern Nigeria ◽  
Groundwater Availability ◽  
Subsurface Structures ◽  
Groundwater Aquifer ◽  
Depth To Water Table ◽  
Electrical Sounding

Assessment of groundwater potential of Iperindo area, Southwestern Nigeria was conducted by mapping spatial distribution of groundwater availability within the area and consequently locating areas of groundwater reserve to serve the community and its environs. This was achieved by integrating geophysical techniques involving landsat ETM-7 satellite data, aeromagnetic data, VLF-EM and electrical resistivity methods to delineate subsurface structures, understand the direction of groundwater flow, and detect the depth to groundwater aquifer. The result of landsat and aeromagnetic revealed some lineament intersection approximately NE-SW direction and interpreted to be potential sites for groundwater development. VLF-EM revealed geologic structures of significant hydrogeological importance at depths of 40 m to 200 m. Vertical electrical sounding (VES) confirmed high groundwater prospect in the areas with estimated depth to water table between 30 m and 100 m. The integrated results of the study revealed adequate groundwater spatial distribution for effective groundwater development in the area.

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.  

Hydrogeophysical investigation for the aquifers in part of Ilorin, Central Nigeria: Implication on groundwater prospect

2021 ◽  
Vol 47 (2) ◽  
pp. 520-534
Author(s):  
Ayodele Kehinde Olawuyi
Keyword(s):  
Groundwater Resources ◽  
Groundwater Potential ◽  
Mean Value ◽  
Groundwater Prospect ◽  
Basement Complex ◽  
Type Curves ◽  
Lateritic Clay ◽  
Overburden Thickness ◽  
Weathered Layer ◽  
Electrical Sounding

Hydrogeophysical study involving the use of Vertical Electrical Sounding (VES) was carried out in part of the basement complex rocks of Ilorin, central Nigeria, with the aim of determining its geoelectric parameters and groundwater potential. A total of thirty (30) VES were carried out using Schlumberger electrode configuration, with half electrode separation (AB/2) varying from 1m to 100m. Information on the subsurface lithologies, overburden thickness and aquiferous layers were obtained from the different VES locations in the study area. From the quantitative interpretations of the data collected, using the method of curve matching with the Orellana-Mooney master curves and 1-D forward modeling with WinResist 1.0 version software, three to five lithologic units were identified in the study. These include: the topsoil, sandy/lateritic clay/laterite, the weathered basement, the fractured basement and the fresh bedrock which are predominantly of the ‘KH’ curve type (30%), followed by ‘H’ type (26.7%), other type curves include ‘QH’ (16.7%), ‘HKH’, ‘HA’ and ‘A’ (6.7% each) and KQ and KQH (3.3% each). The weathered layer and the fractured basement constitute the main aquifer units. The aquifers are of generally low resistivity values (mostly below 100 Ω-m). The depths to dry bedrock at the chosen VES locations vary from 2.7 to 62.7 m with a mean value of 13.02 m in the study area. The geoelectrical interpretations of data obtained in these areas have permitted the delineation of the study area into low and moderate groundwater potential zones. This study is expected to assist in future planning for groundwater resources. Keywords: Hydrogeophysical, Basement Complex, Groundwater, Electrical Soundings, Weathered, Fractured

Groundwater prospect mapping using remote sensing, GIS and resistivity survey techniques in Chhokra Nala Raipur district, Chhattisgarh, India

2019 ◽  
Vol 68 (7) ◽  
pp. 595-606 ◽  
Author(s):  
K. Indhulekha ◽  
Kamalesh Chandra Mondal ◽  
D. C. Jhariya
Keyword(s):  
Remote Sensing ◽  
Industrial Area ◽  
Groundwater Potential ◽  
Groundwater Potential Zone ◽  
Groundwater Prospect ◽  
Potential Zone ◽  
Time Saving ◽  
Thematic Layers ◽  
Groundwater Availability ◽  
Resistivity Survey

Abstract Groundwater availability in urbanized areas is under high demand due to overconsumption and lack of recharge area. It is important to consider the groundwater scenario of the cities and industrial areas for its safe consumption and management. In this framework, remote sensing, geographic information system (GIS), is a tool which plays a vital role to map groundwater prospect zones due to its convenience and time-saving nature. The present study area, the watershed of Chhokra Nala, covers an area which consists partly of an industrial area and also Raipur city. The current study has utilized satellite imagery, along with other data sets, to develop different thematic layers such as geology, land use land cover, drainage and drainage density, lineament, geomorphology, rainfall, slope, groundwater depth and soil types. Integration of all these thematic layers through GIS analysis delineated the groundwater prospect zones by the application of a weighted index overlay method. A Resistivity Survey was also performed to locate groundwater potential zones. The groundwater potential zone map of the study area is categorized into five different zones, namely very low, low, moderate, high and very high.

scholarly journals Evaluation of Topsoil Competence, Aquifer Types, Groundwater Prospect and Flow Pattern using Geoelectric Characterization for Part of Ogbomoso, Nigeria

2021 ◽  
Vol 7 (2) ◽  
Author(s):  
O. G. Bayowa
Keyword(s):  
Groundwater Flow ◽  
Flow Pattern ◽  
Flow Direction ◽  
Groundwater Potential ◽  
Water Levels ◽  
Groundwater Prospect ◽  
Southwestern Nigeria ◽  
Fractured Bedrock ◽  
Resistivity Method ◽  
Weathered Layer

Part of Ogbomoso Southwestern Nigeria was assessed using electrical resistivity method with a view to obtaining the subsurface geoelectric parameters (resistivities and thicknesses), categorizes the topsoil into different competence zones and evaluates the aquifer types, groundwater prospect and flow pattern. Fifty-four Vertical Electrical Sounding (VES) data were quantitatively interpreted using the partial curve matching technique to obtain the preliminary layer parameters which were further refined through 1-D forward modelling WinResist software package. The resulting final layer parameters were used to generate 2D geoelectric sections, isopach and isoresistivity maps and subsequently used to categorize the study area into different topsoil Competence, Aquifer types and Groundwater Potential zones. Static water levels of hand-dug wells in the area were used to generate the groundwater flow pattern. Four subsurface geoelectric layers were delineated. These were the topsoil, laterite, weathered/partly weathered layer (main aquifer) and fractured/fresh bedrock. The resistivities and thicknesses of the layers were 76-1858, 649-2021, 17-880 and 260-33385 Ωm and 0.4-4, 0.7-1.9 and 1.9-25.2 m respectively. The groundwater flow pattern in the area was NE-SW. The study concluded that incompetent to highly competent topsoil, weathered bedrock (main) aquifer unit/partly weathered/fractured bedrock aquifer and generally low groundwater potential with NE-SW flow direction underlay the study area.

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 geological and electrical resistivity methods for groundwater studies at Tatiko, North Central Nigeria

2020 ◽  
Vol 18 ◽  
pp. 15-22
Author(s):  
Abdulwahid Kolawole Aweda ◽  
Ibrahim Kagara Shehu ◽  
Olusegun Omoniyi Ige ◽  
Mohammed Umar Umar ◽  
Joseph Barde David
Keyword(s):  
Structural Control ◽  
Success Probability ◽  
Crystalline Rock ◽  
Groundwater Potential ◽  
North Central ◽  
Groundwater Availability ◽  
Basement Rocks ◽  
Water Wells ◽  
Electrical Sounding ◽  
Geoelectric Data

The success probability of water wells constructed in crystalline rock terrains is largely dependent on the size, location and interconnectivity of the fractures present in them as well as the amount and nature of the material that may clog the fractures. Geological and geoelectrical studies were proposed and conducted at Tatiko to determine the structures in the underlying basement rocks and evaluate their groundwater potential. Geological study was used to delineate the structural control on groundwater availability while the geoelectrical study (Vertical Electrical Sounding) was used to investigate the properties of the subsurface materials and determine their potential to host sufficient quantity of groundwater.Structural data were plotted on a rosset diagram and showed major structural control trending in the NW – SE direction. Quantitative interpretation of the geoelectric data indicates that the major fractures are within the weathered to competent basement indicating good hydraulic connection between the weathered and fresh basement. The fractures are deepest within the region that showed thicker weathering and are as shallow as 7 meters in other regions. Apparent resistivity of the fractures ranges between 100Ωm and 1200Ωm in most parts of the area with the highest values in the west. An integration of the result clearly showed that the NW and SW parts of the study area are the most favourable for drilling and further groundwater studies and drilling is recommended to a depth of 40m to 50m. Keywords: Groundwater, Geoelectrical study, Fractures, Tatiko, Resistivity, Basement Complex.

scholarly journals Applications of Aeromagnetic and Electrical Resistivity Data for Mapping Spatial Distribution of Groundwater Potentials of Dutse, Jigawa State, Nigeria

2019 ◽  
Vol 13 (2) ◽  
pp. 11 ◽  
Author(s):  
Chifu E. Ndikilar ◽  
B. Y. Idi ◽  
B.S. Terhemba ◽  
I. I. Idowu ◽  
S.S. Abdullahi
Keyword(s):  
Electrical Resistivity ◽  
Spatial Distribution ◽  
Management Strategies ◽  
Groundwater Potential ◽  
Mean Value ◽  
Aeromagnetic Data ◽  
Groundwater Exploitation ◽  
Groundwater Availability ◽  
Vertical Electric Sounding ◽  
Integrated Geophysical Survey

Optimal mapping of groundwater resource is usually accomplished using integrated geophysical survey in which two or more techniques are applied. In this work, spectral analysis of aeromagnetic data was used to map the topography of the magnetic crystalline fresh basement underlying the water bearing aquifer of Dutse, Jigawa State Nigeria. Vertical electric sounding technique was used to detect the spatial distribution of the depths to the top of the aquifer within the same area.  The overall goal of the work is to determine the groundwater potential of the area by mapping the spatial distribution of groundwater availability based on aquifer thickness and basement topography. The aquifer depth was found to be within the range of 5 to 15 m with a mean value of 10 m. The basement was found to be highly undulating having depths ranging from 6 to 69 m with a mean value of 24 m. The existence of isolated deep depressions within the basement which appears to be filled by water bearing sediments was thought to be favorable structures for groundwater accumulation. The spatial distribution of groundwater potential was therefore mapped in a reclassified image of three zones, high, moderate and low. The study therefore provides a vital tool for groundwater exploitation and management strategies.

scholarly journals GEOELECTRIC PARAMETERS AND ELEMENTAL COMPOSITIONS OF THE TOP SOIL OF CAMP AREA, ABEOKUTA, SOUTH WESTERN NIGERIA

2016 ◽  
Vol 14 (1) ◽  
pp. 74-88
Author(s):  
V. MAKINDE ◽  
I. C OKEYODE ◽  
J. O. COKER ◽  
F. G. AKINBORO ◽  
J. O. AINA ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Trace Elements ◽  
Elemental Composition ◽  
Underground Water ◽  
Major Elements ◽  
Groundwater Potential ◽  
Soil Samples ◽  
Human Consumption ◽  
Southwestern Nigeria ◽  
Electrical Sounding

Vertical Electrical Sounding (VES) and elemental composition surveys were carried out at twenty-two (22) sites atª¤? Camp Area, Alabata Road, Abeokuta, Southwestern Nigeria. This was with a view to determining depth to water«¤??bearing zones and extent of soil contamination thereby saving residents not just the pain of recurrent losses incurred for investing in dry wells, but also not to invest in contaminated waters. The study area is underlain by associated rock suites which includes pegmatite and quartz veins. Field data obtained was modeled and interpreted to obtain the geophysical parameters of the area and delineate the groundwater potential zones. Soil samples were also collected at the 22 VES points, at depths of 10 cm and 100 cm; the Global Positioning Satellite (GPS) equipment was used to obtain the geographical position of each sample point. Determination of the elemental composition of soil samples collected at the 10 cm and 100 cm depths was made using Atomic Absorption Spectrophotometer. Two heavy metals (Pb, and Cr), five major elements (K, Ca, N, P and Mg) and five trace elements (Zn, Mn, Cu, Al and Fe) were detected. It was observed that the values, representing the amount of the heavy metals, the major elements, and the trace elements were far less, mostly insignificant, at the 100 cm depth representing about the interface between the first and second layers in majority of the VES stations sampled, than at the 10 cm depth, representing the topsoil of the first layer. The implication of this is that the elements are not strictly domiciled within the area studied but may be due to runoffs as the area slopes down. Moreover, going by the values at the 100 cm depth, the elements may not be capable of percolating into the underground water zones in the area of study, and thus might not have contaminated the underground water. Thus, at the current level, the underground water can be adjudged safe for human consumption.ª¤?

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.

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