scholarly journals Resistivity investigation for well-site definition around Barika Village, Southeast Sulaimany city, Iraqi Kurdistan region.

2016 ◽  
Vol 47 (3) ◽  
pp. 1090
Author(s):  
A. F. Ghaib ◽  
H. Abdulla ◽  
H. Anwar
Keyword(s):  
Electrode Spacing ◽  
High Resistivity ◽  
Kurdistan Region ◽  
Current Electrode ◽  
Vertical Electrical Soundings ◽  
Electrical Resistivity Survey ◽  
Iraqi Kurdistan ◽  
Resistivity Survey ◽  
Maximum Current ◽  
Electrical Soundings

An electrical resistivity survey involving Vertical Electrical Soundings (VES) was carried out in the Barika collective village, southeast of Sulaimany City in the Iraqi Kurdistan Region, to study groundwater characteristics such as depth, thickness and aquifer boundaries. Vertical electrical soundings by Schlumberger array were conducted in this area. The resistivity Schlumberger soundings which have a maximum current electrode spacing (AB) of 800m were carried out at fourteen sites along lines in the NE-SW and NW-SE directions. Interpretation of these soundings showed the presence of three geoelectrical horizons. The upper one is representing the alluvialdeposits with 3Ωm to 60Ωm range of resistivity values reflecting the heterogeneity of the slope deposits. The middle one is taken to be the unconfined jointed aquifer represented by the Tanjero Formation with a resistivity range of 10Ωm to 42Ωm and a thickness range of 24m to 106m. The third horizon is representing the lower part of the TanjeroFormation with a relatively high resistivity range of 51Ωm to 556Ωm. Based on these results and upon our recommendations, a successful water well was drilled yielding quite enough amount of fresh water.

scholarly journals Geo-electrical Resistivity Survey in the High Barind for the Delineation of Aquifer Geometry

2013 ◽  
Vol 39 ◽  
pp. 27-37
Author(s):  
AHM Selim Reza ◽  
Quamrul Hasan Mazumder ◽  
Mushfique Ahmed
Keyword(s):  
Electrical Resistivity ◽  
Direct Method ◽  
Water Shortage ◽  
Current Electrode ◽  
Vertical Electrical Soundings ◽  
Electrical Resistivity Survey ◽  
Resistivity Survey ◽  
Aquifer Geometry ◽  
Electrical Soundings ◽  
Geological Section

Geo-electrical resistivity techniques have been employed in the High Barind as a reconnaissance investigation for the subsurface lithology. Out of 13 upazillas, comprising the Barind tract, Sapahar and Porsha Upazillas, situated in the High Barind are badly affected by water shortage. Vertical electrical soundings (VES) were executed using Schlumberger configuration in different areas taking the current electrode separation up to 170 meters. Direct method technique was employed to evaluate the geo-electric layer such as resistivity and thickness of the discrete layers. The results of the resistivity survey give the subsurface information consisting of three to four layers. The results of geo-electric sounding have been compared with the geological section wherever available. DOI: http://dx.doi.org/10.3329/rujs.v39i0.16540 Rajshahi University J. of Sci. 39, 27-37 (2011)

Exploration for Marble Deposit in Parts of Okpella, South-Southern Nigeria

2019 ◽  
pp. 1-7
Author(s):  
K. O. Ozegin
Keyword(s):  
Electrical Resistivity ◽  
Electrode Spacing ◽  
Clayey Sand ◽  
Current Electrode ◽  
Electrical Resistivity Survey ◽  
Resistivity Method ◽  
Resistivity Survey ◽  
Surface Measurements ◽  
Electrical Sounding ◽  
Electrical Resistivity Method

The ultimate aim of the electrical resistivity survey is to determine the resistivity distribution with depth on the basis of surface measurements of the apparent resistivity and to interpret it in terms of geology. Marble deposit was investigated with the application of electrical resistivity method using Vertical Electrical Sounding (VES) technique with the aim of characterising this deposit in parts of Okpella. Six (6) VES were acquired using the Schlumberger array for data acquisition with current electrode spacing varying from 1.0 to 150.0 m. The VES data obtained were interpreted using ipi2win Software. The results showed three layers indicating subsurface geologic sequence probed 26.4 m and beyond with clay/clayey sand (23.3 – 219.1 Ωm), sand (423 - 2040 Ωm) and marble (12661 - 404498 Ωm). The occurrence of marble deposit was revealed at VES points at 1, 2 and 5 in the studied area.  This study concluded that the study area had occurrence of the marble deposits, which would be of economic importance, if exploited.

scholarly journals INVESTIGATION OF GROUNDWATER POTENTIALS IN IMAKUN OMI COMMUNITY USING ELECTRICAL RESISTIVITY METHOD

2020 ◽  
Vol 7 ◽  
pp. 19
Author(s):  
Joseph Olakunle Coker ◽  
Akindamola Julius Agbelemoge ◽  
Stephen Oluwafemi Ariyo ◽  
Victor Makinde ◽  
Aderemi Amidu Alabi ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Groundwater Potential ◽  
High Yield ◽  
Current Electrode ◽  
Ogun State ◽  
Resistivity Method ◽  
The Earth ◽  
Maximum Current ◽  
Electrical Soundings ◽  
Electrical Resistivity Method

Groundwater is described as the water found beneath the surface of the earth in underground streams and aquifers and has become popular as a source of drinking potable water in Nigeria due to its quality when compared to other water sources. The Electrical resistivity method was employed in Imakun Omi Community, a coastal town in Ogun Waterside Local government area of  Ogun State with the aim of determining the groundwater potential of the area. A total of twenty (20) Vertical Electrical Soundings (VES) points were carried out in the area using the Schlumberger configuration with maximum current electrode separation (AB) of 300m using the ABEM SAS 1000 Terrameter. The results obtained were interpreted quantitatively and qualitatively using partial curve matching and computer iteration programs WINRESIST and SURFER 11 for the interpretation from which the reflection coefficient was computed. The groundwater potential of the rock units were evaluated and  40% of the stations show  high yield, 50% of the stations show medium yield and 10% of the stations was observed to have low yield. The aquifer thicknesses are very thick with values ranging from 6.9 m to 79.3 m, hence an average of 43.1mand overburden thicknesses ranging from 9.7m to 96.5 m, with an average of 53.1m

scholarly journals Estimation of Aquifer Characteristics in Parts of Oru Lga of Imo State Nigeria Using Resistivity Data

2019 ◽  
Vol 4 (2) ◽  
pp. 70-84
Author(s):  
I.I.C. Agbodike
Keyword(s):  
Southeastern Nigeria ◽  
Current Electrode ◽  
Imo State ◽  
Transverse Resistance ◽  
Depth To Water Table ◽  
Maximum Current ◽  
Electrical Soundings ◽  
Aquifer Characteristics ◽  
Using Data ◽  
Made In

This paper estimates aquifer characteristics in parts of Oru Area Imo State of Southeastern Nigeria using data from surface electrical soundings. Eighteen vertical electrical soundings were made in the study Area using a maximum current electrode separation of 1.0km.The Abem terrameter SAS 3000B was used in acquiring data. The Schlumberger electrode configuration was adopted in the survey. The result obtained show that the depth to water table varied from 27m to about 205m. Aquifer thickness varied from 24m to about 140m.The aquiferous zones have resistivity range of between 182Wm to about 3934Wm. Aquifer conductivity varied from 0.000254Siemens at Nempi to 0.01036Siemens at Akuma .Transverse resistance varied from 249809Wm2 at Nempi to 3956.5Wm2 at Akuma. Longitudinal conductance varied from 0.01614mho at Nempi to 0.55656mho at Umuoji

A DEEP SCHLUMBERGER SOUNDING TO INVESTIGATE THE ELECTRICAL STRUCTURE OF THE CRUST AND UPPER MANTLE IN SOUTH AFRICA

Geophysics ◽  
1969 ◽  
Vol 34 (3) ◽  
pp. 450-462 ◽  
Author(s):  
J. S. V. Van Zijl
Keyword(s):  
Upper Mantle ◽  
Granite Gneiss ◽  
High Resistivity ◽  
Crust And Upper Mantle ◽  
Current Electrode ◽  
Gneiss Complex ◽  
Final Layer ◽  
Maximum Current ◽  
Electrical Sounding ◽  
Schlumberger Sounding

A deep Schlumberger electrical sounding on the Namaqualand Granite‐Gneiss Complex has been carried out. The sounding center is situated near the middle of this body which measures approximately 500 km by 150 km. Whereas in previous investigations of a similar nature, current electrode spacings have generally been limited to less than 100 km, the use of a telephone line as an emission line has made it possible to extend the maximum current electrode separation to 270 km. Factors which may have influenced the reliability of the measurements include leakage tests, measuring accuracy, lateral effects, and surface electrode effects. The interpretation of the sounding curve which shows the existence of six layers was carried out with the aid of a computer. Some comments are made about the range of the principle of equivalence in the interpretation from the computed results. In particular the results suggest that the lower crust has an extremely high resistivity of approximately 40,000 ohm‐m supposedly due to dehydration. The final layer is conductive.

Geoelectric sounding for the determination of aquifer characteristics in parts of the Umuahia area of Nigeria

Geophysics ◽  
1991 ◽  
Vol 56 (2) ◽  
pp. 284-291 ◽  
Author(s):  
P. D. C. Mbonu ◽  
J. O. Ebeniro ◽  
C. O. Ofoegbu ◽  
A. S. Ekine
Keyword(s):  
Hydraulic Conductivity ◽  
Test Data ◽  
Pumping Test ◽  
Model Parameters ◽  
Current Electrode ◽  
Entire Area ◽  
Maximum Current ◽  
Electrical Soundings ◽  
Aquifer Characteristics

Seventeen Schlumberger vertical electrical soundings (VES) were carried out in parts of the Umuahia area of Nigeria, using a maximum current electrode separation of 1 km. The data were interpreted using a conventional partial curve‐matching method to obtain initial model parameters, which were used in a computer program to obtain final parameters. Three soundings were made at existing boreholes for comparison. Aquifer parameters of hydraulic conductivity and transmissivity were obtained by analyzing pumping test data from existing boreholes. The results of the interpretation revealed three distinct geoelectric layers overlying a conductive geoelectric basement. Based on the model obtained, aquifer hydraulic conductivity and transmissivity were calculated. The hydraulic conductivity calculated agreed closely with that determined from pumping test data. The results of the present study also indicate that the entire area is divided into two zones, each of which is homogeneous in hydraulic properties and water quality, but distinct from the other zone. A local groundwater divide between the Imo and Kwa‐Ibo drainage systems was also defined.

scholarly journals ELECTRICAL RESISTIVITY SURVEY FOR GROUNDWATER POTENTIAL AND ESTIMATION OF CLAY DEPOSIT IN ARAGBA-OKPE, OKPE LOCAL GOVERNMENT AREA, DELTA STATE NIGERIA

10.23856/3105 ◽  
2018 ◽  
Vol 31 (6) ◽  
pp. 52-66
Author(s):  
Julius Otutu Oseji ◽  
James Chucks Egbai
Keyword(s):  
Electrical Resistivity ◽  
Water Supply ◽  
Groundwater Potential ◽  
Electrical Resistivity Survey ◽  
Resistivity Survey ◽  
Sustainable Water Supply ◽  
Electrical Sounding ◽  
Electrical Soundings ◽  
Local Geology ◽  
Dar Zarrouk Parameters

 Electrical resistivity survey employing Vertical Electrical Sounding techniques of Schlumberger arrangement were carried out at seven (7) fairly distributed stations with 154 Vertical Electrical Soundings in Aragba-Okpe. The data obtained from the field were plotted on a log-log graph and interpreted qualitatively by inspection and quantitatively by partial curve matching. The results obtained were improved with the aid of computer iteration using the Winresist Software to delineate the thickness and depth of each layers as well as the resistivity value. These layers were grouped together in to geologic depth intervals known as the Geoelectric sections for interpretations. Using knowledge of both the local geology of Aragba-Okpe and the resistivity of the layers, the Geoelectric sections were interpreted. The study revealed that boreholes for sustainable water supply could be drilled to a depth of 30 m in Aragba-Okpe, However, the fifth layer within Aragba Primary School, Aragba Secondary School and Oviri Aragba Road (VES 1, 5 and 7) are the best locations for sustainable water supply The overburden protective capacities of the aquifer in Aragba-Okpe were evaluated using the Dar-zarrouk parameters. The result also revealed poor aquifer protection ratings of less than 0.1 in all the stations. The groundwater in Aragba-Okpe is therefore not protected and prone to contamination in the event of pollution.

Investigating the hydrogeology of a water-supply area using direct-current vertical electrical soundings

Geophysics ◽  
2005 ◽  
Vol 70 (4) ◽  
pp. H11-H19 ◽  
Author(s):  
László Lenkey ◽  
Zoltán Hámori ◽  
Péter Mihálffy
Keyword(s):  
Hydraulic Conductivity ◽  
Water Supply ◽  
Groundwater Flow ◽  
Danube River ◽  
High Resistivity ◽  
Low Resistivity ◽  
Vertical Electrical Soundings ◽  
Lower Terrace ◽  
Production Wells ◽  
Electrical Soundings

The drinking water of Budapest (Hungary) is supplied by wells located along the Danube River. In one of the water-supply areas, groundwater polluted by nitrate flows from the upper terrace of the river toward the lower terrace and the production wells. In order to protect the wells from pollution, the waterworks of Budapest has to know the hydrogeology of the area in detail. Since groundwater flow strongly depends on the type and distribution of the subsurface materials, we made 230 dc vertical electrical soundings (VES) in the lower terrace over an area of 6 [Formula: see text] to map the subsurface conditions. There is a 200–300-m-wide high-resistivity zone (200–400 ohm-m) running parallel to the river and separated from the upper terrace by a 200–500-m-wide low-resistivity zone (<50 ohm-m). The low resistivity is due to silty and clayey sand, as indicated by monitoring wells. These sediments have low hydraulic conductivity; therefore, they form a hydraulic barrier against the polluted groundwater flow coming from the upper terrace. Except in the northern part of the area, they protect the lower terrace. In the northern part of the area, the lower terrace is narrow, and the low hydraulic conductivity zone is not well developed. Therefore, the polluted groundwater can seep through the lower terrace and reach the production wells. One-dimensional vertical electrical soundings can still be successfully used to map the shallow subsurface resistivity conditions over a large area. The results of the soundings greatly contribute to the understanding of the hydrogeology of the area.

scholarly journals Geological and Geoelectrical Investigation of a Proposed Dam Site Using Vertical Electrical Sounding at Osuworowo Stream, Utughughu Arochukwu, South Eastern Nigeria

2020 ◽  
pp. 30-38
Author(s):  
A. C. Ezebunanwa ◽  
V. N. Nwugha ◽  
K. C. Emeghara ◽  
G. C. Ibe
Keyword(s):  
Vertical Electrical Sounding ◽  
Dam Construction ◽  
Current Electrode ◽  
High Gradient ◽  
Vertical Electrical Soundings ◽  
South Eastern ◽  
Dam Site ◽  
Electrical Sounding ◽  
Electrical Soundings ◽  
Geoelectric Layer

Geophysical studies was carried out at a proposed dam site across Osuworowo stream in Arochukwu, south eastern Nigeria to investigate the depth to bedrock, possible geologic structures and foundation conditions of the dam axis.  The study area is located between latitudes 5°23.58”N and 5°23.707”N and longitude 7°53.93”E and 7°53.97”E. Its elevation ranges from 90 ft to 149 ft. Six Vertical Electrical Soundings (VES) were carried out along the stream course using ABEM SAS 1000 TERRAMETER and this was done using Schlumberger configuration with maximum half current electrode separation of 55m able to reveal deep seated structures. The ip2win software was used to model the VES data to give resistivities which vary between 258 Ωm and 39000 Ωm with three and four geoelectric layer combinations of sand, sandstone, sandyshale, shalysand and ale units. The high resistivities of the geoelectric layers sand thickness and dip showing high gradient in elevation differences are indications that the site is suitable for the dam construction. The geological result shows the presence of faults this is confirmed by change in strike and dip.

scholarly journals Geo-electrical investigation of the groundwater potential of Ogidi and environs, Anambra State, South-eastern Nigeria

2021 ◽  
Vol 11 (3) ◽  
pp. 1053-1067
Author(s):  
C. C. Onyekwelu ◽  
C. N. Onwubuariri ◽  
T. I. Mgbeojedo ◽  
L. S. Al-Naimi ◽  
B. I. Ijeh ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Groundwater Potential ◽  
Electrode Spacing ◽  
Current Electrode ◽  
Anambra State ◽  
Electrical Investigation ◽  
Resistivity Method ◽  
Maximum Current ◽  
Electrical Resistivity Method ◽  
Water Saturated

AbstractThe electrical resistivity method was used to determine the groundwater potential of Ogidi and its environs. Thirteen soundings were carried out at thirteen different locations using the ABEM terrameter (SAS 1000), and adopting the Schlumberger configuration with maximum current electrode spacing of 1000 m. The lithologic logs for the boreholes were used to delineate the geologic sections. The results revealed six to nine geo-electric layers comprising laterite, clayey sandstone, sandstone, water-saturated sandstone and shale. The water-saturated sandstone forms the aquiferous unit. This unit was found to have resistivity values ranging from 363Ωm to 9107Ωm. It is deeply seated in some areas with a depth of 33.2–103 m. It was observed that the hydraulic conductivity varies between 0.001 and 0.066 m/day, while the transmissivity values vary between 0.01 and 4.7 m2/day. Among all the VES points studied, it was observed that VES 1 has the highest transmissivity value and the highest aquifer thickness. In view of the foregoing, it is expected that water will flow more from aquifer in VES 1 since groundwater flow from an aquifer is directly proportional to transmissivity.

Sign in / Sign up

Export Citation Format

Share Document