scholarly journals Vertical Electrical Sounding (VES. Investigation of Aquifer and Potential Clay Materials in Douala Subbasin (Cameroon, Central Africa)

2016 ◽  
Vol 5 (1) ◽  
pp. 94
Author(s):  
Michel Bertrand MBOG ◽  
Gilbert François NGON NGON ◽  
Jacques ETAME ◽  
Anatole E DJIETO LORDON ◽  
Bernard TASSONGWA ◽  
...  
Keyword(s):  
Central Africa ◽  
Thin Layers ◽  
Vertical Electrical Sounding ◽  
Left Bank ◽  
Font Size ◽  
Measuring Device ◽  
Clay Deposits ◽  
Wide Variability ◽  
Electrical Sounding ◽  
Clay Layers

<span style="font-size: 10.5pt; font-family: 'Times New Roman','serif'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;" lang="EN-US">Vertical electrical sounding was done at 47 points using an ABEM 1000 Terrameter and a set of cables that could probe up to a depth of 500m. Resistivity was determined in two sites located in the district of Douala III (Bomkoul and Ngoma) 6 km west of the main town on the left bank of the Wouri River. The choice of these neighbourhood is as a result on the one hand, the presence of clay deposits from which sections have helped to configure resistivity data with those of geoelectric sections, and on the other hand, by the ability to extend the measuring device over great distances without being hindered by urbanization. The depths of investigation range from a minimum of 30 m and a maximum of 120 m. The results show a wide variability in resistivity values throughout the study area; it may be related to the high variability of facies described on sections by diggers. This variability may be due to the complexity of deposits recorded in the Douala sedimentary basin and also because of the presence of water in both sandy and clay sediments due to climate. The suggested resistivity is between 20 and 600ohm.m for clays and greater than 1000 ohm.m for sand. Given the weak thickness of some layers, the cancellation phenomena that affect very thin layers between two layers of different geoelectric properties of the latter have been observed, thus assigning to clay layers, sand resistivity.</span>

Vertical Electrical Sounding as a Tool for Estimating Thickness of Clay Deposit in Delta North District, Nigeria

2011 ◽  
Vol 367 ◽  
pp. 561-566
Author(s):  
F.O. Ezomo
Keyword(s):  
Clayey Soil ◽  
Vertical Electrical Sounding ◽  
Electrode Spacing ◽  
Current Electrode ◽  
Clay Deposit ◽  
Rock Types ◽  
Clay Deposits ◽  
Electrical Sounding ◽  
Soil Clay ◽  
Clay Formation

Geophysical survey based on “Schlumberger” array of vertical electrical sounding (VES) was carried out to study the quantity of clay deposits in Delta North District, Nigeria. Obviously, the quantity of clay deposit depends on its thickness. Previous researchers did not work in this area primarily to search for the clay deposit. The need to prospect or search for clay deposits in this area became inevitable so as to solve the problem of youth restiveness in the area by way of setting up industries in Delta North district that rely on clay for manufacturing purposes. Ten (10) VES, uniformly distributed in six different stations in Agbor were carried out using six (06) points per decade with maximum current electrode spacing of 928.0m. The software IP12WIN utilizing computer iteration was used for interpretation of apparent resistivity data. The result of the resistivity survey showed that clay and clayey soil (clay mixed with other rock types) were present. The depths and thicknesses of each clay formation were then ascertained. Depths to probable clay formations varied from 0.5m to 90m while the thicknesses varied from 0.95m to 7.00m.

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.

A LOW-COST RESISTIVIMETER FOR USE IN PRACTICAL LECTURES OF APPLIED GEOPHYSICS

2016 ◽  
Vol 34 (1) ◽  
Author(s):  
Walter Sydney Dutra Folly ◽  
Aracy Sousa Senra
Keyword(s):  
Electrical Resistivity ◽  
Low Cost ◽  
Test Area ◽  
Vertical Electrical Sounding ◽  
Applied Geophysics ◽  
Resistivity Profile ◽  
Electrical Sounding ◽  
Good Agreement

ABSTRACT. We describe the construction and testing of a simple and efficient low-cost resistivimeter designed for use in practical classes in Applied Geophysics. The equipment was successfully tested in a vertical electrical sounding (VES) performed on sandy terrain within the campus of the Universidade Federal de Sergipe, Brazil. The VES results were in good agreement with the profiles obtained from two boreholes located approximately 500 m from the test area, clearly demonstrating the efficiency of the equipment and the adopted methodology.Keywords: vertical electrical sounding, electrical resistivity, resistivity profile. RESUMO. Neste artigo, descrevemos a construção e o teste de um resistivímetro de baixo custo, simples e eficiente, concebido para ser utilizado em aulas práticas de Geofísica Aplicada. O equipamento foi testado com a realização de uma sondagem elétrica vertical (SEV) em um terreno arenoso localizado no campus da Universidade Federal de Sergipe, Brasil. Os resultados obtidos nesta SEV apresentaram boa concordância com os perfis observados em dois poços de sondagem localizados a 500 m da área de teste, fato que comprovou a eficiência do equipamento e da metodologia adotada.Palavras-chave: sondagem elétrica vertical, resistividade elétrica, perfil de resistividade. 

Assessment of groundwater repositories in Edem, Southeastern Nigeria, using vertical electrical sounding

2021 ◽  
Vol 14 (6) ◽  
Author(s):  
Emmanuel Tochukwu Omeje ◽  
Desmond Onyeka Ugbor ◽  
Johnson Cletus Ibuot ◽  
Daniel Nnemeka Obiora
Keyword(s):  
Vertical Electrical Sounding ◽  
Southeastern Nigeria ◽  
Electrical Sounding

Vertical Electrical Sounding (VES) of Chukchi Sea Ice

2018 ◽  
Author(s):  
Ryan Fry ◽  
Connor Parks ◽  
Mark Meadows ◽  
Rhett Herman
Keyword(s):  
Sea Ice ◽  
Chukchi Sea ◽  
Vertical Electrical Sounding ◽  
Electrical Sounding
Sign in / Sign up

Export Citation Format

Share Document