scholarly journals Aquifer analysis of Durensewu-Karangjati water source in Pandaan, Pasuruan using 2D resistivity method in identifying pollution of domestic waste

2020 ◽  
Vol 452 ◽  
pp. 012105
Author(s):  
A S Bahri ◽  
P R Aripin ◽  
P V Hardyani ◽  
A Hilyah ◽  
M S Purwanto ◽  
...  
Keyword(s):  
Water Source ◽  
Domestic Waste ◽  
Resistivity Method ◽  
2D Resistivity

Aplikasi metode tahanan jenis dalam studi geologi karst Gua Seropan di Gunung Kidul, Yogyakarta

2017 ◽  
Vol 12 (2) ◽  
pp. 105-116
Author(s):  
Pulung A. Pranantya ◽  
Nurlia Sadikin
Keyword(s):  
Fresh Water ◽  
Ground Surface ◽  
Water Source ◽  
Raw Water ◽  
Limited Information ◽  
Resistivity Method ◽  
Central Java ◽  
Underground River ◽  
Initial Exploration

In terms of geology, most areas in south of the Gunungkidul District in Central Java consist of the Wonosari formation limestone. The land is generally very dry and source of raw water is also difficult to reach. Findings on the existence of underground river in caves, however, indicate the potential amount of water within the area, especially in the eastern part of the Gunungkidul District. Although limited information available, some fishermen have discovered that Seropan cave contains fresh water source. This cave is situated at 65 m below the cliff. Initial exploration, which done using a multichannel resistivity method, confirmed the availability of freshwater in the cave and underground river. The isopach of cave depth is found in ranges of 80 200 m below the ground surface. The water of Seropan cave can be utilized by implementing pipeline or by drilling at the suggested point based on the interpretation results, i.e. 110o2223.6388 EL 8o42.874 SL. [DY1][PP2][DY1]Perbaiki grammarIn terms of geology, most areas in south of Gunungkidul District in Central Java consist of the Wonosari formation limestone. The land is generally very dry and source of raw water is also difficult to reach. Findings on the exixtence of underground river in caves, however, indicate potential amount of water within the area especially in eastern part of Gunungkidul District. Although limited information available, some fishermans has discovered that Seropan cave contain fresh water source. This cave is situated at 65 m below the cliff. Initial exploration, which done using multichannel resistivity method, confirmed the availability of freshwater in the cave and underground river. The iso pach of cave depth is found in ranges of 80 200 m below the ground surface. The water of Seropan cave can be utilized by implementing pipeline or by drilling at the suggested point based on the interpretation results i.e. 110o2223.6388 EL 8o42.874 SL.[PP2]Sudah diperbaiki

scholarly journals The Use of Drop-Structures to Increase the Dissolved Oxygen Level along the Cibarani Channel

2021 ◽  
pp. 55-66
Author(s):  
Jonathan Wijaya ◽  
Doddi Yudianto ◽  
Finna Fitriana
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Vertical Wall ◽  
Drainage System ◽  
Water Source ◽  
Domestic Waste ◽  
Control Techniques ◽  
The One ◽  
Drop Structure ◽  
Test Result

The Cikapundung river basin community uses the Cibarani channel as a drainage system and water source for fishing. However, the test result released on 9th November 2020 revealed that the channel’s water quality failed to reach the class II raw water standards due to various domestic waste discharges. This led to the performance of various studies to identify pollution control techniques by limiting the wastewater discharge and quality, controlling the intake discharge, and using baffles. The Cibarani channel has a drop-structure that can improve the water quality, though the effect has not been previously detailed. Therefore, this study was intended to comprehensively examine the effect of the drop-structure along the Cibarani channel to improve water quality conditions, specifically the Dissolved Oxygen (DO) parameter. This study employed the one-dimensional HEC-RAS software to simulate the hydrodynamic and water quality conditions along the Cibarani channel, and the drop-structure was modelled using two alternatives consisting of a vertical wall and a steep riverbed. Subsequently, the drop-structure fitted with a vertical wall gave a more plausible reaeration rate of 125 day-1 and Root Mean Square Error (RMSE) value of 0.50. The placement of a similar configuration before the first housing of the channel increased the DO concentrations by an average of 4.37 mg/L. This was followed by the modelling of another drop-structure after the first housing to increase the DO levels at the downstream part. Eventually, the combination of the two new drop-structures succeeded in increasing the DO concentrations along the Cibarani channel to 3.3 - 6.9 mg/L.

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 Groundwater Potential Assessment Using 2-D Resistivity Method In Kluang, Johor (Malaysia)

Warta Geologi ◽  
2020 ◽  
Vol 46 (3) ◽  
pp. 220-224
Author(s):  
Nazrin Rahman ◽  
◽  
Edy Tonnizam Mohamad ◽  
Rosli Saad ◽  
◽  
...  
Keyword(s):  
Surface Waters ◽  
Hard Rock ◽  
Water Source ◽  
Unconfined Aquifer ◽  
Groundwater Potential ◽  
Suitable Alternative ◽  
Resistivity Method ◽  
Hard Rock Aquifers ◽  
Increasing Demand ◽  
Groundwater Source

Sources of clean water are decreasing due to rapid usage, contaminated surface waters, pollution and dry season. The dependence on the existing water source is not enough to fulfil the increasing demand of population in Malaysia. In order to overcome the problem, groundwater source is the most suitable alternative. 2-D resistivity method was carried out in a granitic area of Kluang, Johor to delineate and locate groundwater resource. 5 survey lines were conducted by using ABEM SAS4000 terrameter and electrode selector which were connected to 41 electrodes through lund cables. Pole-dipole array was chosen in this study for deeper penetration. Collected data were processed by using RES2DINV software to produce inversion model which was then exported to Surfer8 software for visualisation and interpretation. The result shows that most of the study area consist of granite with different level of fracturing. Unconfined aquifer was found at depths of 0 to 50 m. Confined aquifers can be seen at two different zones. They exhibit same properties at three parallel lines, R1-R3 and show continuity between them. It is predicted that the aquifers flow in the southwest to northeast direction. The hard rock aquifers are highly recommended to be drilled as they contain a large amount of fresh water for further usage.

IDENTIFICATION OF AQUIFER USING RESISTIVITY GEOELECTRIC METHOD IN REGIONAL OF BEBANDEM, KARANG ASEM, BALI

2018 ◽  
Vol 19 (1) ◽  
pp. 24-34
Author(s):  
Budy Santoso
Keyword(s):  
Electrical Resistivity ◽  
Electrical Resistivity Tomography ◽  
Geophysical Methods ◽  
Soil Surface ◽  
Water Source ◽  
Resistivity Tomography ◽  
Resistivity Method ◽  
Surface Image ◽  
Resistivity Variation ◽  
Resistivity Meter

Bungaya Kangin Village, Bebandem District, Karangasem Regency, Bali Province consists of paddy fields and settlements, required therefore a water source / aquifer  that can meet all these needs. One of the Geophysical Methods that can identify the aquifer is the Geoelectric Method. Geoelectric method used in this research is Resistivity Method. Data acquisition using Vertical Electrical Sounding (VES) and Electrical Resistivity Tomography (ERT) Methods. VES method is a method of measurement to determine the variation of resistivity vertically at one point. Electrical Resistivity Tomography (ERT) method is a method of measuring resistivity on soil surface / rock by using many electrode (51 electrode), to obtain sub-surface resistivity variation  lateraly and verticaly, to obtain sub-surface image. The equipment used for geoelectric measurements is  Resistivity Meter of Naniura NRD 300 Hf which has been equipped with a switchbox to adjust the displacement of 51 electrodes. Based on the resistivity modeling results, the aquifers in the study area were found in rough sandstones with resistivity values : (49 - 100) Ohm.m.  

2D resistivity method in delineating subsurface problems in urban area

2013 ◽  
Author(s):  
M. M. Nordiana ◽  
Rosli Saad ◽  
A. H. A. Teh Saufia ◽  
I. N. Azwin ◽  
Nisa' Ali ◽  
...  
Keyword(s):  
Urban Area ◽  
Resistivity Method ◽  
2D Resistivity

scholarly journals 2D RESISTIVITY TIME LAPSE ANALYSIS FOR POTENTIAL ZONING SLIDE WET MUD IN PANEL 7 DEEP ORE ZONE (DOZ)

2019 ◽  
Vol 1 (2) ◽  
pp. 060-067
Author(s):  
Felisitas K. Ulian ◽  
Jeffri Parrangan
Keyword(s):  
Cross Sections ◽  
Data Use ◽  
Secondary Data ◽  
Time Lapse ◽  
Mining Area ◽  
Primary Data ◽  
Mining Operations ◽  
Resistivity Method ◽  
2D Resistivity ◽  
High Possibility

Abstract High rainfall may disrupt mining operations due to possibility of wet mud slides, occurences. One of the area wet mud slide in the mining area of "DOZ" Panel 7 West PT Freeport Indonesia, Mimika District, Papua Province. Study was needed to image the subsurface where have high probability of wet mud slide might happen. Resistivity method was used using Wenner Alpha configuration with a total length of 270 m. The measurements were performea six times at different dates. Measured data use as the primary data to determine the high possibility areas of mud wet slides. And the primary data were compared with secondary data such as rainfall and geological data. Analysis the resistivity cross-sections show that the low resistivity zones are located in Panel 7 DP # 14E, 16E, 18E, 19E, 20E and 21E. Water enter the DOZ Mine (Deep Ore Zone) by infiltration and precipitation directly through the cave material, permeable zones along the contact zone of diorite/skarn/marble, and the spillover cut crackline or caveline of formation Lower Kais. The correlation between the quantitative data of the apparent resistivity with rainfall data has the highest value of 3.52 %. Keywords: Resistivity, wet muck, panel

scholarly journals Application of 2D resistivity method to determine serpentinite rocks in Kuta Cot Glie, Aceh Besar

2020 ◽  
Vol 10 (1) ◽  
pp. 12-16
Author(s):  
Muhammad Reyza Khalid ◽  
Fadhli Syamsudin ◽  
Nasrullah Zaini ◽  
Didik Sugiyanto
Keyword(s):  
Electrical Properties ◽  
Raw Material ◽  
Metamorphic Rocks ◽  
Geophysical Method ◽  
Resistivity Method ◽  
Ornamental Stones ◽  
Surface Models ◽  
Result Show ◽  
Aceh Province ◽  
2D Resistivity

Abstrak. Kuta Cot Glie di Aceh Besar, merupakan salah satu daerah yang memiliki potensi batuan metamorf serpentinit. Batuan ini dapat digunakan sebagai bahan baku untuk pembuatan pupuk, batu hias, dan beberapa manfaat lainnya. Penelitian ini bertujuan untuk menginterpretasi model bawah permukaan dan memperkirakan ketebalan lapisan batuan serpentinit. Metode geofisika yang digunakan adalah metode geolistrik resistivitas dengan konfigurasi Wenner-Schlumberger. Pengukuran dilakukan pada dua lintasan sepanjang 275 m untuk masing-masing lintasan dengan 56 buah elektroda dan jarak spasi setiap elektroda adalah 5 m. Prinsip metode geolistrik tersebut memanfaatkan sifat kelistrikan suatu material untuk mengetahui karakteristik material. Hasil penelitian menunjukkan bahwa nilai resistivitas adalah 50 - 150 Ωm yang diperkirakan lapisan batuan serpentinit dengan ketebalan 10 - 35 m.Abstract. Kuta Cot Glie located in Aceh Besar, Aceh Province, has a natural potential of serpentine. The metamorphic rocks used as a raw material for making fertilizer, ornamental stones, and other benefits. This research aims to interpret sub-surface models and estimate the thickness of the rock layers. The geophysical method used in this study was the resistivity geoelectric method with a Wenner-Schlumberger configuration. Measurements were carried out on two lines with 275 m for each line and the spacing of the electrode was 5m using 56 electrodes. The physical approach utilizes the electrical properties of a material to determine the characteristics of its material. The result show that the resistivity of 50 to 150 Ωm can be interpreted as serpentinite rock layers with the thickness of 10 m to 35 m.Keywords: Serpentinite, resistivity, geoelectric method, Wenner-Schlumberger configuration.

Uncertainties Analysis of Electrical Resistivity Tomography

2021 ◽  
Author(s):  
Yonatan Garkebo Doyoro ◽  
Chang Ping-Yu ◽  
Jordi Mahardika Puntu
Keyword(s):  
Model Resolution ◽  
Resistivity Data ◽  
Resistivity Method ◽  
Resistivity Model ◽  
2D Resistivity Imaging ◽  
Model Set ◽  
Different Depths ◽  
Measured Resistivity ◽  
2D Resistivity ◽  
Subsurface Cavities

<p>We examined the uncertainty of the resistivity method in cavity studies using a synthetic cavity model set at six-different depths. Conceptual models were simulated to generate synthetic resistivity data for dipole-dipole, pole-dipole, Wenner-Schlumberger, and pole-pole arrays. The 2D geoelectric models were recovered from the inversion of the synthetically measured resistivity data. The highest anomaly effect (1.46) and variance (24400) in resistivity data were recovered by dipole-dipole array, while the pole-pole array obtained the lowest anomaly effect (0.60) and variance (2401) for the target cavity T<sub>1</sub>. The anomaly effect and variance were linearly associated with the quality of the inverted models. The steeper anomaly gradient of resistivity indicated more distinct cavity boundaries, while the gentler gradient prevents the inference of the cavity boundaries. The recovered model zone above the depth of investigation index of 0.1 has shown relatively higher sensitivity. Modeling for dipole-dipole array provided the highest model resolution and anomaly gradient that shows a relatively distinct geometry of the cavity anomalies. On the contrary, the pole-dipole and Wenner-Schlumberger arrays recovered good model resolutions and moderate anomaly gradient but determining the anomaly geometries is relatively challenging. Whereas, the pole-pole array depicted the lowest model resolution and anomaly gradient with less clear geometry of the cavity anomalies. At deeper depths, the inverted models showed a reduction in model resolutions, overestimation in anomaly sizes, and deviation in anomaly positions, which can create ambiguity in resistivity model interpretations. Despite these uncertainties, our modeling specified that the 2D resistivity imaging is a potential technique to study subsurface cavities.</p>

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