Electrical resistivity and induced-polarization imaging for groundwater exploration

Aizebeokhai, A. P.; Oyeyemi, Kehinde D.

doi:10.1190/segam2016-13857737.1

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…Hasil sayatan 2D yang dihasilkan pada survei tomografi resistivitas (ERT) 2D dikaji berdasarkan asumsi bahwa model geolistrik bawah permukaan yang dihadapi adalah model 2D, dimana tidak terdapat variasi nilai resistivitas pada arah tegak lurus lintasan. Namun, pada beberapa kondisi, asumsi ini memberikan kesalahan ketika model yang dihadapi ternyata adalah model 3D [6]. Efek model resistivitas yang berasal dari sisi luar lintasan, baik sisi kiri maupun kanan, akan berpengaruh terhadap pengukuran 2D tersebut.…”

Section: Latar Belakangunclassified

Kajian Numerik Kesalahan Hasil Pengukuran Geolistrik 2D Terhadap Target Model 3D: Studi Kasus Pengukuran di Dekat Gedung Berpondasi Beton

Hartantyo

2023

Positron

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Survei geolistrik 2D dikaji berdasarkan asumsi bahwa model geolistrik bawah permukaan yang dihadapi adalah model 2D, dimana tidak terdapat variasi nilai resistivitas pada horisontal arah tegak lurus lintasan. Namun, pada beberapa kondisi, asumsi ini memberikan kesalahan ketika model yang dihadapi ternyata adalah model 3D. Pada paper ini dituliskan kajian komputasi terhadap pengaruh keberadaan pondasi bangunan terhadap lintasan-lintasan geolistrik di sampingnya. Model berukuran node dengan spasi horisontal 0,5 m, tersusun oleh 4 lapisan akuifer normal yang mendatar. Digunakan 21 node tambahan untuk syarat batas Neuwmann di sisi-sisi model selain permukaan. Pada 5 node di sisi utara diberikan model blok pondasi sebuah bangunan. Perhitungan dilakukan menggunakan penyelesaian beda hingga Res3Dmod pada 21 lintasan untuk 4 konfigurasi: Schlumberger, Wenner, Dipole-dipole dan Pole-pole. Hasil kajian menunjukkan bahwa; pada kajian nilai selisih resistivitas semu pada area pondasi, konfigurasi Dipole-dipole memberikan respon yang paling tinggi terhadap kesalahan tersebut hingga pada jarak 11 m untuk selisih resistivitas semu <3 , sedangkan ketiga konfigurasi yang lain berada pada jarak 8 m. Nilai eror secara keseluruhan kurang dari 1%: Wenner dan Pole-pole sejauh 10 m dari pondasi, Schlumberger sejauh 11 m dari pondasi, dan Dipole-dipole sejauh 13 m dari pondasi. Konfigurasi Wenner memberikan respon yang paling baik dan konfigurasi Wenner juga merupakan konfigurasi yang direkomendasikan untuk menghindari kesalahan pengukuran 2D akibat keberadaan model 3D di bawahnya.

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Section: Latar Belakangunclassified

Kajian Numerik Kesalahan Hasil Pengukuran Geolistrik 2D Terhadap Target Model 3D: Studi Kasus Pengukuran di Dekat Gedung Berpondasi Beton

Hartantyo

2023

Positron

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“…The information that could be obtained from geophysical studies includes the thickness and the depth to the groundwater reservoir (aquifer). Other important derivative information is the geohydraulic parameters of the subsurface aquifer which include aquifer hydraulic conductivity, porosity and permeability (Yadav, 1995;Soupios et al, 2007;Chandra et al, 2008;Uyanık, 2011;Aizebeokhai and Oyeyemi, 2015;Aizebeokhai et al, 2016aAizebeokhai et al, , 2016bAizebeokhai et al, 2017aAizebeokhai et al, , 2017bOyeyemi, 2018, 2018b;Aizebeokhai et al, 2018aAizebeokhai et al, 2019;Umi Maslinda and Nordiana, 2018). The geoelectrical sounding or vertical electrical sounding (VES) technique measures the distribution of electrical resistivity in the subsurface.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the groundwater potential of coastal aquifer using geoelectrical resistivity survey and porosity estimation: A case in Ota, SW Nigeria

Oyeyemi

Aizebeokhai

Metwaly³

et al. 2021

Groundwater for Sustainable Development

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Geoelectrical resistivity sounding surveys was carried out at two locations (A and B) in the new CanaanCity residential estate of Canaan land Ota, Ogun state in order to locate possible targets for groundwater explorations. A total of twelve (12) vertical electrical soundings were conducted using the Schlumberger array configuration. The interpretations of the VES curves revealed five to six geoelectrical layers at location A which comprises VES1-7. The geoelectric units consist of the topsoil, sandy clay, lateritic clay, confining bed (clayey sand), and main aquifer (sand). The top of the aquifer in this part of the study area is between 40 m and 83.5 m. Likewise, a total of five to seven layers of geoelectrical units were delineated at the location B portion of the study site (VES 8-12) similar to location A with an addition of the shale unit that was interpreted to be that of the Akimbo Formation of the Dahomey Basin. The depth to the top of the productive aquifer within location B is in the range of 40-112.4 m. The delineated basal shale layer is impermeable, serving as the base seal rock for the confined aquifer system. The estimated porosity values range from 28% to 74%, indicating that the highly porous aquifer system in the area is the coastal plain sands mixed with the alluvium sand of the Benin Formation of Dahomey Basin. The study revealed the complexity of the productive aquifer system in the area and its undulating topography.

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“…TDIP was initially designed to help in the detection of metallic ore in mining activities [24], and is still largely used for this purpose today [25][26][27]. In the past decades, the method has also increasingly been used in environmental soil monitoring applications [28][29][30][31][32] and groundwater related investigations [33,34].…”

Section: Introductionmentioning

confidence: 99%

Induced Polarization as a Proxy for CO2-Rich Groundwater Detection—Evidences from the Ardennes, South-East of Belgium

Defourny

Nguyen

Collignon³

et al. 2020

Water

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CO 2 -rich mineral groundwaters are of great economic and touristic interest but their origin and circulation paths in the underground are often poorly understood. A deeper understanding of the system plumbery and the development of non—to minimally—invasive near-surface geophysical methods for the prospection of potential productive areas is therefore of great interest to manage future supply. The objective of this contribution is to assess the ability of the time-domain induced polarization (TDIP) method, combined with the electrical resistivity tomography (ERT) method, to make the distinction between CO 2 -rich groundwater from non-gaseous groundwater. Three combined ERT/TDIP tomographies were performed above known uplift zones in the south-east of Belgium where thousands of CO 2 -rich groundwater springs exist. On all profiles, important contrasts in both electrical resistivity and chargeability distributions were observed in the vicinity of the upflow zone, also reflected in the normalized chargeability sections computed from the measured data. Low resistivity vertical anomalies extending in depth were interpreted as a saturated fracture network enabling the upflow of deep groundwater to the surface. High chargeability anomalies appearing directly close to the CO 2 -rich groundwater springs were inferred to metallic oxides and hydroxides precipitation in the upper part of the aquifer, linked to pressure decrease and changing redox conditions in the up-flowing groundwater approaching the land surface. The combined interpretation of electrical resistivity and induced polarization datasets provides a very promising method for a robust prospection of CO 2 -rich groundwater.

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Electrical resistivity and induced-polarization imaging for groundwater exploration

Abstract: Electrical resistivity and induced-polarization imaging for groundwater exploration (

Cited by 5 publications

References 7 publications

Kajian Numerik Kesalahan Hasil Pengukuran Geolistrik 2D Terhadap Target Model 3D: Studi Kasus Pengukuran di Dekat Gedung Berpondasi Beton

Kajian Numerik Kesalahan Hasil Pengukuran Geolistrik 2D Terhadap Target Model 3D: Studi Kasus Pengukuran di Dekat Gedung Berpondasi Beton

Evaluating the groundwater potential of coastal aquifer using geoelectrical resistivity survey and porosity estimation: A case in Ota, SW Nigeria

Induced Polarization as a Proxy for CO2-Rich Groundwater Detection—Evidences from the Ardennes, South-East of Belgium

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