Resistivitas Batuan Berdasarkan Metode Geolistrik Konfigurasi Schlumberger untuk Menentukan Potensi Air Tanah Sebagai Acuan Sumur Bor

The purpose of this study is to analyze rock resistivity based on the geoelectric method of the Schlumberger configuration to determine the potential for groundwater as a reference for boreholes. The method used in this research is the geoelectric resistivity method with a Schlumberger configuration. Data acquisition modeling was analyzed using Progress Version 3.0 to describe the subsurface based on measurement sounding points in the field. The main targets for these measurements are confined aquifer traps and sandstone stratigraphy. Field measurement points are at coordinates S 030 43 '52.2 "and E 1020 19' 27.1". The results of this study indicate that the layer that is thought to be the groundwater carrier layer is found at a depth of about 64.99 meters to 150.86 meters with a layer thickness of 85.87 meters, which is in the form of sandstone density with a resistivity value of 5.39 ohm meters. The iteration error scale value in this study is, 5.05% RMS. In conclusion, the results obtained can provide specific information for groundwater drilling actors in the research location. Keywords: Groundwater, Geoelectricity, Resistivity, Schlumberger

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EKSPLORASI AKUIFER AIR BAWAH TANAH MENGGUNAKAN METODE TAHANAN JENIS 2D DI DESA SELARU KABUPATEN KOTABARU, KALIMANTAN SELATAN

AL ULUM JURNAL SAINS DAN TEKNOLOGI ◽

10.31602/ajst.v5i2.2886 ◽

2020 ◽

Vol 5 (2) ◽

pp. 74

Author(s):

Rudy Hendrawan Noor ◽

Ishaq Ishaq ◽

Jarwanto Jarwanto ◽

Dwi Priono

Keyword(s):

Data Acquisition ◽

Groundwater Potential ◽

Rock Fractures ◽

Secondary Porosity ◽

Cross Sectional ◽

Hydrological Data ◽

Resistivity Method ◽

Porosity And Permeability ◽

Data Coverage ◽

Geoelectric Resistivity

Geoelectric resistivity method is one method that can be used to characterize water-bearing rock layers (aquifers). This method is based on the existence of differences in type resistivity in the layers of rock that are flowed electrically. The use of this method is based on easy application, faster data acquisition with broad data coverage (lateral and vertical), and lower costs. Data acquisition uses two configurations or electrode arrangement, namely sclumberger and wenner-schlumberger configurations. The number of trajectories for data acquisition uses one path with a total of 28 electrodes and the spacing between the electrodes is 20 meters. The data obtained in the form of data resistivity type of each underground layer and its depth will be further analyzed using AGISSAdmin software. The results are obtained in the form of a 2-dimensional (2D) cross-sectional value of underground layers laterally and vertically. The low resistivity value will be interpreted as a layer containing ground water, which was previously corrected against the geological and hydrological data of the area. From the cross section of the type resistors, values of 20 - 317 Ωm were obtained for the wenner and wenner-schlumberger arrangements. Selaru Village consists of two rocks unit, the first rock (≤ 120 Ohm.m) in the form of Tanjung Formation rocks, with large porosity and small permeability and groundwater potential in this unit is small (0 - 40 m depth). The second rock (≥ 120 Ohm.m) is Pre Tertiary, with very little porosity and permeability, except secondary porosity in rock fractures.

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Identifikasi Akuifer Dangkal dan Akuifer Dalam dengan Metode Geolistrik (Kasus: Di Kecamatan Masaran)

INDONESIAN JOURNAL OF APPLIED PHYSICS ◽

10.13057/ijap.v6i01.1798 ◽

2016 ◽

Vol 6 (01) ◽

pp. 40

Author(s):

D Darsono

Keyword(s):

Data Collection ◽

Data Processing ◽

Layer Thickness ◽

Unconfined Aquifer ◽

Confined Aquifer ◽

Current Electrode ◽

Geoelectric Resistivity ◽

Resistivity Meter

Identification of aquifer layer location has been done using Schlumberger configuration of geoelectric resistivity methods in Masaran District. Data collection was performed using resistivity meter OYO Mc-el-ohm series 2119c having a length of current electrode (AB / 2) from 1.5 m to 350 meters. Data processing was done using software IP2win. The purpose of this study was to identify the location of confined aquifer and unconfined aquifer. The result showed that litology of aquifer layers were detected as clayed sand, sands and gravel sands. The depth of confined aquifer was detected for TS1 (4.52 meters to 8.57 meters and 22.4 meters to 34 meters), TS2 (8.84 meters to 20.9 meters), TS3 (2.87 meters to 10 meters and 13.3 meters to 41.5 meters), TS4 (20.09 meters to 6.71 meters and 17.3 meters to 36.4 meters) and TS5 (6.3 meters to 25 meters). The thickest layer of confined aquifer was TS3. While, the depth of unconfined aquifer was detected for TS1 (68.1 meters to 78 meters and 94.3 meters to 115 meters), TS2 (36.9 meters to 93.4 meters and 103 meters to 134 meters), TS3 (72.8 meters to 101 meters), TS4 (46.3 meters to 67.5 meters and 82.1 meters to 98 meters), and TS5 (50.1 meters to 93.5 meters and 99.7 meters to 111 meters). The layer thickness of unconfined aquifer were detected for TS1 (30.6 meters), TS2 (86.7 meters), TS3 (28.4 meters), TS4 (37 meters), and TS5 (55 meters). The layer thickness of unconfined aquifer that has the thickest was TS2.

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Identification of Aquifer in the MIPA Faculty - University of Jember Using 1D Geoelectrical Resistivity Method with Schlumberger Array

Jurnal ILMU DASAR ◽

10.19184/jid.v21i2.13159 ◽

2020 ◽

Vol 21 (2) ◽

pp. 123

Author(s):

Bayu Buwana ◽

Nurul Priyantari ◽

Supriyadi Supriyadi

Keyword(s):

Volcanic Rocks ◽

Natural Sciences ◽

Subsurface Structures ◽

Resistivity Method ◽

Academic Activities ◽

Geoelectric Resistivity ◽

Geoelectrical Resistivity ◽

Resistivity Log ◽

The University ◽

Schlumberger Array

Faculty of Mathematics and Natural Sciences University of Jember located in Sumbersari District with lithological conditions in the form of volcanic rocks, lithosol soils, and regosol soils that are capable of absorbing water and potentially as aquifers. In point of fact, in the campus zona of the University of Jember including in the Faculty of Mathematics and Natural Sciences, there is always a shortage of freshwater for various academic and non-academic activities. Therefore, research needs to be conducted to assess the lithology of subsurface structures in the FMIPA zone so that the depth of groundwater layers and aquifer layers can be determined. The study was conducted using the Schlumberger array geoelectric resistivity method at 5 VES points. The results obtained in the form of resistivity log curves can be seen that at the five points VES has lithology in the form of clay, gravel, sandstone, and groundwater layer. Each VES point was identified the groundwater layer and some of them were identified as aquifers. The aquifer with the greatest thickness is found at point VES 2, which is to the west of the Baitul Ilmi Mosque, so it is recommended as the location of a new well.Keywords: lithology, aquifers, geoelectric resistivity method, groundwater.

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PEMETAAN AKUIFER AIR TANAH DI JALAN RINGROAD KELURAHAN MALENDENG DENGAN MENGGUNAKAN METODE GEOLISTRIK TAHANAN JENIS

JURNAL ILMIAH SAINS ◽

10.35799/jis.15.1.2015.6778 ◽

2015 ◽

Vol 15 (1) ◽

pp. 33 ◽

Cited By ~ 1

Author(s):

Dewi Sedana ◽

As’ari As’ari ◽

Adey Tanauma

Keyword(s):

Geophysical Method ◽

Low Resistivity ◽

Resistivity Method ◽

The Earth ◽

Groundwater Aquifers ◽

Working Principle ◽

Geoelectric Resistivity ◽

Subsurface Exploration

PEMETAAN AKUIFER AIR TANAH DI JALAN RINGROAD KELURAHAN MALENDENG DENGAN MENGGUNAKAN METODE GEOLISTRIK TAHANAN JENIS ABSTRAK Geolistrik merupakan salah satu metode geofisika yang dimanfaatkan dalam eksplorasi alam bawah permukaan. Prinsip kerja metode geolistrik adalah mempelajari aliran listrik di dalam bumi dan cara mendeteksinya di permukaan bumi. Penelitian ini bertujuan untuk memetakan akuifer Airtanah di Jalan Ringroad Kelurahan Malendeng berdasarkan resistivitas batuan bawah permukaan. Penelitian terdiri dari 4 titik sounding pada 1 lintasan dengan jarak setiap titik 40 meter. Hasil eksplorasi diolah dengan menggunakan software IP2WIN untuk melihat data perlapisan di bawah permukaan tanah berdasarkan nilai resistivitasnya (2D) dan pesebaran titik – titik terdapatnya akuifer Airtanah. Hasil penelitian menunjukkan bahwa akuifer Airtanah berada pada daerah yang dekat sungai yaitu pada titik 4 yang memiliki nilai resistivitas rendah kurang dari 123 Ωm. Kata kunci : Geolistrik tahanan jenis, akuifer Airtanah, software IP2WIN. THE MAPPING OF GROUNDWATER AQUIFERS AT THE RINGROAD MALENDENG VILLAGE BY USING GEOELECTRIC RESISTIVITY METHOD ABSTRACT Geoelectric is a geophysical method that is utilized in natural subsurface exploration. The working principle of geoelectric method is to study the flow of electricity in the earth and how to detect them in the earth's surface. This study aims to map the aquifer Groundwater at the Ringroad Malendeng village based resistivity of the subsurface rocks. The study consisted of four points on 1-sounding track with the distance of each point 40 meters. Exploration results were processed using software IP2WIN to view data subsurface layering based on the value of the resistivity (2D) and point - the point of the presence of Groundwater aquifers. The results showed that the aquifer Groundwater is the area near the river is at point 4 which has a low resistivity value of less than 123 Ωm. Keywords: Geolistrik resistivity, Groundwater aquifers, IP2WIN software.

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Detecção de um aquífero fraturado por múltiplas sondagens elétricas verticais e por caminhamento elétrico multinível

Brazilian Journal of Geophysics ◽

10.22564/rbgf.v37i4.2015 ◽

2019 ◽

Vol 37 (4) ◽

pp. 368

Author(s):

Juliana Targino Batista ◽

José Agnelo Soares

Keyword(s):

Data Acquisition ◽

Fracture Zone ◽

Crystalline Basement ◽

Electric Resistivity ◽

Vertical Fracture ◽

Vertical Electrical Soundings ◽

Resistivity Method ◽

Fractured Aquifers ◽

Electrical Soundings ◽

Schlumberger Array

RESUMO O presente trabalho analisa o efeito da adoção de diferentes configurações do método da eletrorresistividade para investigar a ocorrência de potenciais aquíferos fissurais. Em uma área onde reconhecidamente existe uma zona de fraturas subverticais no embasamento cristalino foram aplicadas as técnicas de múltiplas sondagens elétricas verticais (SEVs), utilizando o arranjo Schlumberger, e o caminhamento elétrico utilizando o arranjo gradiente multinível. Três diferentes configurações foram testadas em uma mesma linha cuja direção é aproximadamente perpendicular aos planos das fraturas. Os resultados obtidos mostram que o caminhamento elétrico multinível pelo arranjo gradiente apresentou maior clareza na detecção da zona de fraturas em relação às configurações utilizando sondagens elétricas verticais. No entanto, tais estruturas subverticais ainda poderiam ser detectadas por sondagem elétrica, desde que adotado um afastamento adequado entre os centros das SEVs. As seções geoelétricas obtidas pelas configurações testadas indicam a presença de uma estrutura acumuladora de água subterrânea do tipo riacho-fenda. Adicionalmente, o caminhamento elétrico pelo arranjo gradiente apresenta vantagens operacionais em relação às demais configurações, sendo mais prático e rápido nos trabalhos de aquisição de dados no campo.Palavras-Chaves: Hidrogeofísica, eletrorresistividade, embasamento cristalino. ABSTRACT This paper analyzes the effect of adoption of different configurations of electric resistivity method to investigate the occurrence of potential fractured aquifers. In an area where there is a sub vertical fracture zone in the crystalline basement the techniques of multiple vertical electrical soundings (VES), using the Schlumberger array, and electrical profiling using the multilevel gradient array, were applied. Three different configurations were tested in a same line whose direction is approximately perpendicular to the fracture plan. The results show that the multilevel gradient array presented better clarity in detecting fracture zone than the settings using vertical electrical soundings. However, such sub vertical structures could still be detected by VES, since it is adopted a proper separation between the VES centers. Obtained geoelectric sections indicate the presence of a groundwater accumulating structure composed by a crack-induced stream. Additionally, the electric gradient profiling presents operational advantages in relation to other arrays, being more practical and fast for data acquisition in the field.Keywords: Hydrogeophysics, electric resistivity, crystalline basement.

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