scholarly journals Identifikasi Akuifer Air Tanah Menggunakan Metode Geolistrik Tahanan Jenis Konfigurasi Dipol-Dipol Di Masjid Kampus Universitas Sam Ratulangi

Jurnal MIPA ◽  
2017 ◽  
Vol 6 (1) ◽  
pp. 17
Author(s):  
Ofvelia Thrisha Gijoha ◽  
As’ari As’ari ◽  
Guntur Pasau
Keyword(s):  
Specific Resistivity ◽  
Resistivity Method ◽  
Groundwater Aquifer ◽  
On Line ◽  
Southern Side ◽  
Dipole Configuration

Telah dilakukan penelitian akuifer air tanah berdasarkan resistivitas batuan bawah permukaan. Eksplorasi geofisika menggunakan metode tahanan jenis konfigurasi dipol-dipol dengan pengkuran dengan 5 lintasan pengukuran. Data setiap lintasan diolah menggunakan perangkat lunak RES2DINV, pada setiap lintasan mempunyai 609 buah data. Teridentifikasi akuifer air tanah dengan resistivitas ρ ≤ 7,16 Ωm. Akuifer potensial terdapat pada lintasan 1 di lokasi Masjid bagian Timur dengan kedalaman 0-15 m, pada lintasan 3 pada jarak 40 m disebelah Selatan Masjid dan lintasan 4 pada jarak 5 m selatan Masjid bagian Barat dengan kedalaman 14-18 m.A research on groundwater aquifer has been done according to subsurface rocks resistivity, the exploration using specific resistivity method of dipole-dipole configuration by measuring on 5 lanes. The data on each lane was processed using RES2DINV software, where each lane consisted of 609 data. The identified groundwater aquifer has a resistivity of ρ ≤ 7,16 Ωm. Potential aquifer are on line 1 which located eastward from the Mosque with a depth of 0-15 m, on line 3 with a range of 40 m southward from the Mosque, and on line 4 with a range ofnm westward from the southern side of the Mosque with a depth of 14-18 m.

scholarly journals Identification Of Unconfined Aquifer Using 3D Resistivity Analysis At Simpang 5 Area, Semarang, Central Java, Indonesia

Warta Geologi ◽  
2020 ◽  
Vol 46 (3) ◽  
pp. 199-203
Author(s):  
Supriyadi Supriyadi ◽  
◽  
Fianti Fianti ◽  
Dwi Rizki R ◽  
Agus Setyawan ◽  
...  
Keyword(s):  
Survey Design ◽  
Living Organism ◽  
Unconfined Aquifer ◽  
The North ◽  
Resistivity Method ◽  
Central Java ◽  
Groundwater Aquifer ◽  
Groundwater Condition ◽  
On Line ◽  
2D And 3D

Water is a unique property of the Earth and very important to every living organism. The existence of groundwater is only 0.61% of the total water on earth (oceans, rivers, lakes, polar ice, rain). The purpose of this research is to determine the location and depth of the aquifer by using 2D and 3D modeling. The method of research is resistivity method using Schlumberger configuration, where data is collected according to the survey design with coordinate ranging from X:436100, Y:9226880 to X:436680, Y:9227640, and covered by 7 lines. The modeling results indicate that the present groundwater aquifer potential has low resistivity distribution in this area. The spreading of unconfined aquifer is estimated on the north side to the east of Simpang 5 area. This can be seen from syncing the data of line one to six. But the data on line seven is of different patterns with other lines. The existence of groundwater basin is not easily identified on this line. This may be due to the location of Line Seven being located in the area of Ciputra Mall, Horison Hotel and Tlogorejo Hospital with higher consumption of water, thus the decrease in groundwater condition. This may cause conditions such as land subsidence. The results of interpretation based on the modeling show the possibility of an unconfined aquifer with groundwater level at 10-15 m depth with varied end of border groundwater depth.

scholarly journals Investigasi Akuifer Air Tanah di Banua Buha Asri 1 Kelurahan Buha Manado Dengan Menggunakan Metode Geolistrik Resistivitas

2019 ◽  
Vol 20 (1) ◽  
pp. 1
Author(s):  
As'ari As'ari ◽  
Seni Herlina J Tongkukut ◽  
Brayen A.M Pogaga ◽  
Iftita A Akasi ◽  
Fingken S Sagai ◽  
...  
Keyword(s):  
Ground Water ◽  
Cross Sectional ◽  
Groundwater Aquifers ◽  
Groundwater Aquifer ◽  
On Line ◽  
Potential Groundwater ◽  
Geoelectric Resistivity ◽  
Dipole Configuration ◽  
Almost All ◽  
Subsurface Resistivity

Investigasi Akuifer Air Tanah di Banua Buha Asri 1 Kelurahan Buha Manado Dengan Menggunakan Metode Geolistrik Resistivitas ABSTRAKPenelitian investigasi akuifer air tanah di perumahan Banua Buha Asri 1 Kelurahan Buha dengan menggunakan metode geolistrik resistivitas bertujuan untuk membuat peta model 2 dimensi sebaran air tanah di bawah permukaan. Penyebaran air tanah yang tidak merata menimbulkan masalah bagi masyarakat dalam memenuhi kebutuhan hidupnya. Keberadaan air tanah yang tersimpan dalam akuifer, dapat diidentifikasi dengan menggunakan eksplorasi geofisika. Metode geolistrik konfigurasi dipol-dipol cocok digunakan sebagai metode untuk identifikasi akuifer air tanah. Data pengukuran diolah menggunakan perangkat lunak Res2Dinv. Eksplorasi menghasilkan peta model 2 dimensi tampang lintang resistivitas bawah permukaan. Akuifer air tanah potensial teridentifikasi mempunyai resistivitas ρ ≤ 24 Ωm dengan kedalaman ≤ 8 m pada lintasan 1 dan ≤ 12 m berada pada lintasan 2. Air tanah dalam teridentifikasi pada kedalaman ≥ 20 m pada kedua lintasan.Kata Kunci: akuifer, geolistrik, resistivitasGroundwater Aquifer Investigation in Banua Buha Asri 1 Buha Village Manado by Using Resistivity Geoelectric Method ABSTRACTResearch on groundwater aquifer investigation in Banua Buha Asri 1 housing Buha Village by using resistivity geoelectric method goals to create a 2-dimensional model map of subsurface groundwater distribution. The uneven distribution of ground water causes problems for the community to fullfil their daily needs, because almost all human activities in their daily needs intersect with water. The presence of ground water stored in aquifers can be identified using geophysical exploration. The dipole-dipole configuration of geoelectric method is suitable as a method for identifying groundwater aquifers. Measured data processed by using Res2Dinv software. Exploration produced a 2-dimensional map of subsurface resistivity cross-sectional models. Potential groundwater aquifer (resistivity ρ ≤ 24 Ωm) surface with a depth of ≤ 8 m on line 1 and ≤ 12 m on line 2. Deep ground water was identified at a depth of ≥20 m on both lines.Keywords: aquifer, geoelectric, resistivity

scholarly journals An Investigation of Groundwater Contamination around Nsukka Municipality Dumpsite using the Resistivity Method

2020 ◽  
Author(s):  
Olisah Nzemeka
Keyword(s):  
Electrical Resistivity ◽  
Groundwater Contamination ◽  
Low Resistivity ◽  
Electrical Resistivity Survey ◽  
Resistivity Method ◽  
Electrical Sounding ◽  
On Line ◽  
2D Resistivity Imaging ◽  
Resistivity Meter ◽  
2D Resistivity

An investigation using electrical resistivity method was conducted around a solid waste dumpsite at Nsukka in Nsukka L.G.A of Enugu State, Nigeria to investigate the level of groundwater contamination. Electrical Sounding (VES) and 2D resistivity imaging were used with a digital read out resistivity meter (ABEM SAS 1000) to acquire data in the area. A total of eight (8) sounding and six (6) 2D resistivity imagings were carried out in the area. A contaminant leachate plume was delineated in 2D resistivity sections as low resistivity zones while the VES shows the depth of aquifer. In 2D pseudosections where bluish colours with low resistivities (less than 20.80Ωm) with the depth ranging from 1.28m to 17.1m in the Line 1 and 2 are seen as contaminated zones. The rest of the lines are not contaminated because of their high resistivities (greater than 20.80Ωm). The result of the electrical resistivity survey also showed 4 - 5 layers geo-electric sections and an AA and AK type sounding curves. The VES result shows that VES 1A, 1B, 2A and 2B which are carried out on line 1 & 2 of the wenner lines showed signs of contamination with low resistivity values less than 20.80Ωm complementing the wenner results. The contamination has not yet got to where the aquifer is located on the lines. Since the depth to the aquifer ranges from 30.26m to 155.43m while maximum depth of contamination is 17.1m. It is believed that the leachate has not percolated down to the aquiferous zones as such aquifers are presumed to be free.

scholarly journals Analysis And Modelling Of Geoelectric Data Modeling For The Identication Of Groundwater aquifer At Cisarua Area, West Bandung

2020 ◽  
Vol 17 (2) ◽  
pp. 22
Author(s):  
A Daniswara ◽  
Darharta Dahrin ◽  
Setianingsih Setianingsih
Keyword(s):  
Least Square Method ◽  
Least Square ◽  
Resistivity Method ◽  
Soil Zone ◽  
Groundwater Aquifer ◽  
Geological Conditions ◽  
Aquifer Characteristic ◽  
The Difference ◽  
Agricultural Business ◽  
Geoelectric Data

Groundwater is the main need of society in everyday life. Groundwater is one of renewable resources but it doesn’t mean that it can be exploitated without limit. Several factors that affect the availability of groundwater derived from nature such as geological conditions, rainfall, and green areas should be considered. Water in the soil is stored in a porous layer and has a good permeability is called an aquifer. Cisarua area is located in West Bandung regency, West Java which is a hilly area that has a topography with a slope ranging from normal to steep. The land use in this area is still dominated with plantation and forest as green area. Groundwater aquifer characteristics in that area needs to be examined and analysed for the needs of the community and agricultural business. In this research, the writer used inversion modeling technique of geoelectric data to visualize the condition of subsurface. Resistivity inversion modelling of apparent resistivity data as a result of resistivity method with Wenner-Schlumberger configuration is then carried out with least-square method. The initial model is modified in an iterative manner such that the sum of square error of the difference between the model response and the observed data values is minimized. The result of resistivity modelling is used for analysis of aquifer characteristic such as lithology, depth and structure along with considering geological reference. As the result of modelling, the area of measurement is divided into three zones which are Zone of aeration, Zone of Saturation, and endapan formasi. Zone of aeration is located at depth 0-25 m with resistivity 20-100 Ohm.m and the predicted lithology is gravel or weathered soil. Zone of Saturation (akuifer) is located at depth 25-60 m with resistivity 4-30 Ohm.m and the predicted lithology is sandstone or clay. Endapan Formasi Cibereum is located at more than 60 m from ground with resistivity more than 100 Ohm.m and the predicted lithology is sandy tuff or dry breccia.

scholarly journals PEMETAAN AKUIFER AIRTANAH DI WILAYAH KAMPUS UNSRAT MANADO DENGAN MENGGUNAKAN METODE GEOLISTRIK TAHANAN JENIS

2015 ◽  
Vol 15 (1) ◽  
pp. 20
Author(s):  
Sweetny Steria Sulu ◽  
As’ari As’ari ◽  
Seni Herlina Juwita Tongkukut
Keyword(s):  
Shallow Groundwater ◽  
Electric Resistivity ◽  
Subsurface Structure ◽  
Resistivity Method ◽  
Groundwater Aquifer ◽  
The Difference

PEMETAAN AKUIFER AIRTANAH DI WILAYAH KAMPUS UNSRAT MANADO DENGAN MENGGUNAKAN METODE GEOLISTRIK TAHANAN JENISABSTRAK Penelitian ini bertujuan untuk memetakan keberadaan akuifer air tanah di Jl. Kampus Selatan Kecamatan Sario Kota Manado berdasarkan resistivitas batuan bawah permukaan hasil eksplorasi geofisika dengan metode geolistrik tahanan jenis. Penelitian ini terdiri dari 18 titik sounding yang terbagi dalam 4 lintasan dimana setiap lintasan dibuat model struktur lapisan tanah dibawah permukaan. Kondisi lapisan akuifer airtanah ini dapat dieksplorasi dengan metode geofisika yang dapat digunakan untuk menyelidiki struktur bawah permukaan berdasarkan perbedaan resistivitas batuan. Hasil eksplorasi ini kemudian diolah dengan menggunakan software IP2WIN untuk melihat data lapisan tanah berdasarkan nilai resistivitasnya (2D) dan pesebaran titik – titik terdapatnya akuifer airtanah. Berdasarkan model struktur lapisan tanah di bawah permukaan ini diperoleh lapisan akuifer airtanah yang berupa akuifer airtanah dangkal dengan nilai resistivitas ρ  14,5 Ωm. Lapisan akuifer airtanah  yang berupa akuifer airtanah dangkal permukaan dengan kedalaman 2 meter pada titik sounding 3. Kedalaman 3 meter pada setiap titik sounding. Terdapat akuifer airtanah dangkal dalam pada kedalaman 10 meter dititik sounding 15. Kata kunci : Akuifer airtanah, geolistrik tahanan jenis, software IP2WIN, struktur lapisan tanah. THE MAPPING OF GROUNDWATER AQUIFER IN UNSRAT (MANADO BY USING THE GEO ELECTRIC OF RESISTIVITY METHOD ABSTRACT This research is intebded to map the existence of groundwater aquifer at Jl. Kampus Selatan Kecamatan Sario in Manadi city, based on resistivity of subsurface rock as exploration result is of geophysics by geo electric methode . The research consist of 18 sounding points which divided in 4 lines, that a model of  this aquifer can be explored by geophysics method. This method can be use to see into subsurface structure based on the difference of rocks resistivity. This exploration result then proceeded by using IP2WIN software to see ground layers data based on resistivity values (2D) and the spread of the points in which the groundwater aquifer exists. Based on this subsurface ground layers structure, the groundwater aquifer layer of shallow groundwater is acquired with ρ  14,5 Ωm resistivity values. This can be found on sounding point 3 at depth of 2m. Aquifer with dept of 10m found in sounding point 15. Keyword : groundwater aquifer, geo electric resistivity, IP2WIN software, ground layers structure.

scholarly journals Simulation of Time-Lapse Resistivity Method on Sandbox Model to Determine Fluid Changes and Desaturation

2020 ◽  
Vol 5 (4) ◽  
pp. 227-233
Author(s):  
Rizka Rizka ◽  
Beta Arroma Piskora ◽  
Soni Satiawan ◽  
Hendra Saputra
Keyword(s):  
Model Simulation ◽  
Time Lapse ◽  
Track Length ◽  
Archie’S Law ◽  
Unconfined Aquifers ◽  
Resistivity Method ◽  
Measurement Results ◽  
Dry Conditions ◽  
Dipole Configuration ◽  
Confined And Unconfined Aquifers

Time-lapse resistivity method is an implementation of the resistivity method that is executed exactly at the same spot but with various in time. In this study, the technique uses to identify the dynamics of groundwater fluids. The application of the time-lapse resistivity method was carried out by performing a sandbox model simulation that contains layers of rocks with a fault structure. The rock layers consist of tuff, fine sandstone, shale, coarse sandstone, gravel that represents confined and unconfined aquifers. The simulation was achieved by applying the Electrical Resistivity Tomography (ERT) dipole-dipole configuration at the same place, and measurements with 3 different conditions, namely dry, wet conditions filled with 2.5% water and wet conditions filled with 5% water. Data acquisition uses Naniura resistivity meters with a track length of 96 cm. The first measurement results (dry conditions) obtained a range of resistivity values ​​from 3.7 to 168.1 Ω.m, the second measurement (wet conditions filled 2.5% water) obtained the range of resistivity values ​​from 3.3 to 110.8 Ω.m and the third measurement (wet conditions) filled with 5% water the resistivity values ​​range from 1.7 to 91.2 Ω.m. Following the results of time-lapse inversion processing, a larger percentage change in the amount of 5.6% due to water absorption by the surface which then migrates into the inner layer. Whereas the percentage of desaturation ranges is from -3.11 to 0.217 %, refer to Archie’s Law assumes conduction is caused by water content.

DEVELOPMENT OF 3D MODEL VIEW OF POTENTIAL GROUNDWATER AQUIFER FOR IRRIGATION USING GEOPHYSICAL TECHNIQUE

2015 ◽  
Vol 76 (15) ◽  
Author(s):  
Fathin Ayuni Azizan ◽  
Mohamed Azwan Mohamed Zawawi ◽  
Ahmad Fikri Abdullah
Keyword(s):  
Electrical Resistivity ◽  
3D Model ◽  
Resistivity Method ◽  
Groundwater Aquifer ◽  
Tube Wells ◽  
Geological Formation ◽  
Potential Groundwater ◽  
2D Resistivity ◽  
Non Destructive ◽  
Model View

A 2D surface electrical resistivity is one of non-destructive methods to investigate groundwater. In this study, 2D resistivity method was used to produce subsurface imaging profiles which are known as ERT (Electrical Resistivity Tomography) at Block C, Sawah Sempadan, Tanjung Karang, Selangor. These ERT profiles were then used to create 3D model view of potential aquifer at the study area. Overall, there were 3 ERT profiles of 1600m for major survey lines and 6 ERT profiles of 400m for minor lines. ERT profiles were then compared to lithology log from nearby tube wells of same geological formation in order to locate potential aquifer location in these profiles. Results show that there were 7 locations of identified potential aquifer in this study area. Later, the resistivity data were added with longitude and latitude data before imported into Voxler to achieve the objective of the study. The 3D model view of skeleton shape was productively built in Voxler as it visibly illustrates the whole subsurface profiles of study area. Locations of potential aquifers were identified in this 3D model view to show the exact location and depth of each potential aquifer.

scholarly journals Integrasi Metode Resistivitas, Seismik Refraksi, Geologi Berbasis Geospasial untuk Identifikasi Potensi Longsor di Srimartani, Yogyakarta

2021 ◽  
Vol 1 (2) ◽  
pp. 109-122
Author(s):  
Besse Nurul Luthfiani Azis ◽  
Ketut Arya Wikranta ◽  
Nur Siti Anifah ◽  
Wihdah Syamsiyah Q Syamsiyah Q ◽  
Dirga Wahyuzar
Keyword(s):  
Slip Plane ◽  
Seismic Refraction ◽  
Research Area ◽  
Potential Zone ◽  
Resistivity Method ◽  
Site Survey ◽  
Weathered Layer ◽  
Dipole Configuration ◽  
Subsurface Resistivity ◽  
The Impact

Kabupaten Bantul merupakan salah satu kabupaten yang berpotensi terjadi tanah longsor, tepatnya di daerah Srimartani, Kecamatan Piyungan. Penelitian ini dilakukan dengan tujuan untuk mendapatkan data dan informasi mengenai parameter metode geofisika daerah longsor dan mengetahui dugaan zona potensi longsor. Metode yang digunakan dalam penelitian ini adalah survei lokasi, akuisisi metode seismik refraksi, akuisisi metode resistivitas, dan pemetaan foto udara (geospasial). Dari penampang bawah permukaan seismik refraksi metode hagiwara didapatkan bahwa lapisan lapuk pada daerah riset berupa soil dan pasir tuffan dikarenakan memiliki sifat permeable dan bidang gelincirnya yang bersifat impermeable. Pada penampang bawah metode seismik refraksi lapisan pertama yaitu soil dengan kecepatan V1 sekitar 313.8 m/s – 461.6 m/s dan lapisan kedua yaitu pasir dengan kecepatan V2 sekitar 459 m/s – 1567 m/s. Sementara penampang bawah permukaan metode resistivitas konfigurasi dipole – dipole didapatkan lapisan lapuk tersebut memiliki nilai resitivitas yang kecil dikarenakan lapisan tersebut bersifat lunak sehingga ada kemungkinan lapisan tersebut dalam kondisi basah. Pada penampang resistivitas memiliki nilai 126 ohm.m hingga lebih dari 301 ohm.m, daerah tersebut diperkirakan terdapat batuan breksi batuapung dari formasi semilir yang diduga sebagai bidang gelincir. Dari segi geologi, daerah penelitian sangat rentan terjadi tanah longsor dikarenakan kondisi lereng searah dengan kondisi struktur regional di daerah penelitian yaitu barat-timur, didukung oleh kondisi batuan yang ada berupa breksi batuapung dan tuff yang sangat rawan terjadi longsor. Dengan adanya penelitian ini, diharapkan dapat menambah pengetahuan mengenai antisipasi masyarakat dalam meminimalisir dampak yang ditimbulkan dari adanya tanah longsor. Bantul Regency is one of the districts that have the potential for landslides to occur, precisely in the Srimartani area, Piyungan District. This research was conducted with the aim of obtaining data and information about the parameters of the geophysical method of landslide areas and knowing the alleged landslide potential zone. The methods used in this research are site survey, seismic refraction acquisition method, resistivity method acquisition, and aerial photography (geospatial) mapping. From the subsurface seismic refraction of the Hagiwara method, it was found that the weathered layer in the research area was soil and sand due to its permeable properties and impermeable slip plane. . In the lower section of the seismic refraction method, the first layer is soil with a V1 velocity of around 313.8 m/s – 461.6 m/s and the second layer is sand with a V2 velocity of about 459 m/s – 1567 m/s. While the subsurface resistivity method of the dipole - dipole configuration found that the weathered layer has a small resistivity value because the layer is soft so there is a possibility that the layer is in a wet conditionIn the cross section resistivity has a value of 126 ohm.m to more than 301 ohm.m, the area is estimated to contain pumice breccia from the breccia formation which is thought to be a slip plane. In terms of geology, the research area is very susceptible to landslides because the slope conditions are in line with the regional structural conditions in the research area, namely west-east, supported by the existing rock conditions in the form of pumice breccia and tuff which are very prone to landslides. With this research, it is hoped that it can increase knowledge about community anticipation in minimizing the impact of landslides.

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