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All Journal POSITRON Jurnal Teknosains Journal of Aceh Physics Society UNEJ e-Proceeding INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Geografi Journal of Physics and Its Applications Jurnal Ilmiah Mahasiswa Teknik Kebumian Jurnal Pusat Inovasi Masyarakat Jurnal Natural Aceh International Journal of Science and Technology
Marwan Abu Bakar
Department Of Geophysical Engineering, Faculty Of Engineering, Universitas Syiah Kuala, Banda Aceh
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Aplikasi Metode Resistivitas 2D untuk Menentukan Intrusi Air Laut di Lambada Lhok Aceh Besar Aceh Gartika Setiya Nugraha; Marwan Marwan; Akmal Muhni
Jurnal Teknosains Vol 9, No 1 (2019): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.34368

Abstract

Lambada Lhok is one of the coastal areas with the most severe water crisis in Aceh Besar, Aceh. Clean water crisis happening in the area because of their breach of saltwater into freshwater aquifers and also due to the large decrease in ground water level that resulted in seawater intrusion. This research was conducted on four lines at two locations, namely: 3 (three) lines in the village of Lambada Lhok and 1 (one) line in the village of Kajhu. Kajhu village was used as comparative data for areas that are free from the intrusion of sea water. The research method using 2D resistivity Wenner-Schlumberger configuration, while the data acquisition using the ARES equipment. Data analysis using Res2Dinv software to make 2-dimension (2-D) cross section model. Lambada Lhok village is an alluvial deposition with an average height of 0-5 meters above sea level (dpl). The subsurface lithology of the village lambada lhok consists of clay sand, sandy clay and clay. Based on the results of the analysis of resistivity values indicate that the suspected sea water intrusion in the village of Lambada Lhok reaches a depth of 29 meters. It can be concluded that the spread of sea water intrusion in Lambada Lhok beginning of the line LL 1, LL 2 to LL 3. Distribution of seawater intrusion are most severe in the trajectory LL 2 and began to decrease at LL 3 trajectory.
Analysis Of The Geothermal Potential Based Fault Zone In Burni Telong Bener Meriah, Aceh, Indonesia Gartika Setiya Nugraha; Marwan Marwan; Oky Ikhramullah; Susanti Alawiyah; Sutopo Sutopo
UNEJ e-Proceeding 2016: Proceeding The 1st International Basic Science Conference
Publisher : UPT Penerbitan Universitas Jember

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Abstract

Mount of Burni Telong located in Bener Meriah, Aceh, Indonesia is one of the mountains that have the potential for development of renewable energy from geothermal sources, but is still untapped. The evidence suggests that, to date Aceh still depends on power supplies from North Sumatra. This dependence often affects alternate electricity blackouts all over the province so that the necessary rationale for their source of power generation in Aceh. The purpose of this study was to analyze the potential development of Burni Telong as geothermal energy power plant in Aceh, Indonesia.This study was a survey with the approach in the field of geophysics. Analysis of potential geothermal done using the gravity method to investigate the distribution of mass in the subsurface. The study found that there are two tracks, namely: A-A' and B-B track'. A-A' tracks has four layers, composed of: Riolitic Tuff (1.77g/cm3), basaltic Tuff (2:12 gr/cm3), Diorites (2.78 gr/cm3),and basalt (3:00 gr/cm3). B-B' tracks has three layers, namely: Basaltic Tuff (2.12 gr/cm3); Diorites (2,78 gr/cm3), and basalt (3.00 gr/cm3). In both of these trajectories found two faults, namely: normal and Horst. It can be concluded that the difference in density contrast and hot springs that are parallel to the fault indicates a fault in Burni-Telong, so Burni Telong has the potential Geothermal and very likely to be developed as a source of electricity generation from geothermal energy in Aceh, Indonesia.
Characterization of Landslide geometry using Seismic Refraction Tomography in the GayoLues, Indonesia Muzakir Zainal; Badrul Munir; Marwan Marwan; Muhammad Yanis; Akmal Muhni
Journal of Physics and Its Applications Vol 3, No 2 (2021): May 2021
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v3i2.10601

Abstract

Landslides are the most common geological phenomenon in Indonesia.The event is damage to public infrastructure, and fatalities was a big impact. Therefore, mapping the geometry of landslides is a part of the mitigation effort possible by geophysical methods. In this research, we applied seismic refraction tomography (SRT) to study the geometry of the sliding zone from the landslide event.TheNational Disaster Management Authority reported that the area was frequently occurring landslide disaster, i.e. 2018, 2019 and 2020 which caused the public infrastructure and obstructed the road access from the central to the west of Aceh. The SRT was measured in two profileslong the road.Data measurements were conducted on the side of the Babahrot - GayoLues road section that had experienced landslides.Measurements were made using the Seismograph PASI 16S24-P and 24 geophones to obtain a 92-meterlong profile with 2 meter spacing between the geophones. P-wave velocity data modeling is done using ZondST2D software.The results of modeling profiles 1 and 2 describe three different subsurface layers.The SRT profile 1 model consists of slate (0.2 - 0.7 km/s), clay (0.8 - 1.3 km/s), and sandy clay (1.4 - 1.9 km/s).While, the model of profile 2 consists of slate (0.5 - 1.0 km/s), clay (1.1 - 1.6 km/ s), and sandy clay (1.7 - 2.5 km/s).The contrasting wave velocity model shows that the SRT method can be used in landslide studies as a reference in determining the mechanism of the landslide system.
Interpretasi Distribusi Struktur Geologi Berdasarkan Anomali Medan Gravitasi Citra Satelit di Kabupaten Bener Meriah Muhammad Kamal; Marwan Marwan; Muhibbuddin Muhibbuddin
Journal of Geoscience, Mining Engineering, and Technology Vol 1, No 1 (2017): Jurnal Ilmiah Mahasiswa Teknik Kebumian
Publisher : Journal of Geoscience, Mining Engineering, and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (512.156 KB)

Abstract

Telah dilakukan penelitian tentang interpretasi distribusi struktur geologi dengan memanfaatkan data anomali medan gravitasi citra Geodetic Satellite (GeoSat) dan European Remote Sensing-1 (ERS-1) Satellite yang telah terkoreksi udara bebas. Penelitian ini bertujuan menentukan nilai gravitasi batuan dan indikasi distribusi struktur geologi berupa sesar/patahan di Kabupaten Bener Meriah. Data gravitasi dilakukan koreksi topografi, koreksi Bouguer dan perhitungan anomali Bouguer sederhana untuk menentukan indikasif distribusi struktur geologi. Data yang diperoleh dilakukan interpolasi sehingga menghasilkan peta kontur anomali Bouguer sederhana. Setelah didapatkan anomali Bougeur sederhana dilakukan THD untuk mendapatkan distribusi struktur geologi di lokasi penelitian. Dari hasil penelitian diperoleh bahwa distribusi struktur geologi dominan berarah timur-barat.
Efficient Use of Satellite Gravity Anomalies for mapping the Great Sumatran Fault in Aceh Province Muhammad Yanis; Marwan Marwan; Nazli Ismail
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 9, No 02 (2019): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (805.861 KB) | DOI: 10.13057/ijap.v9i2.34479

Abstract

Gravity Satellite has been widely used in tectonic studies and regional of geological mapping. The Satellite Gravity data are provided free by Scripps Institution of Oceanography, University of California San Diego. The data are acquired by GEOSAT and ERS-1 satellites with a 1.5 km resolution for one pixel. For a further application, the tilt derivative analytic technique was used in order to enhance linear trends of the geological structure revealed by the Bouguer anomalies. The method is represented by the value of an angle between the total horizontal and vertical derivative from the gravity data. The results show that the tilt derivative calculation has been able to map clearly some geological structures on the north of Sumatra i.e., the Aceh and the Seulimeuem segments, as well as some local faults around them. On the other hand, Banda Aceh as the capital city of Aceh Province and Pidie District is dominated by positive values of the tilt derivative anomalies. The data coincide with geological maps of both areas where they are covered by alluvial deposits. Based on the result, it can be concluded that the tilt derivative method is potentially used for quick interpretation of the satellite gravity data.
APPLICATION OF UNMANNED AERIAL VEHICLE AS A BASE MAP LAYER IN NEAR-SURFACE GEOPHYSICS Muhammad Yanis; Aprilla Hasibuan Anggini; Faisal Abdullah; Muzakir Zainal; Marwan Abubakar
JURNAL GEOGRAFI Vol 13, No 1 (2021): JURNAL GEOGRAFI
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jg.v13i1.17818

Abstract

The Geophysical method is operated by using physical parameters above the surface to estimate the subsurface structures. In data interpretation, all 3D surveys, i.e., magnetic, gravity, magnetotelluric, and airborne, are required for geographical conditions in the research area. In a large area, global DEM data is used to explain the field condition, but for local measurement, the data is not efficient due to low resolution (15-30 m/px). This research uses UAV technology to produce a high-resolution topography in local Geophysical measurement (500 x 600 m). The survey was conducted to map the coal structure in the subsurface. UAV data were also compared to SRTM (30 m/px) and DEMNAS (8 m/px) as global topography. Based on data processing, the UAV topographic was have a high resolution of 2.5 cm/px. Comparison of UAV and magnetic data are able to explain a good condition of field measurement than a global DEM data, even in a relatively small area; outcrops of the coal (50x50 m) can show a good differences contrast of topography. Based on data analysis, we can conclude that UAV technology can interpret the geophysical data measured in a local area.Keywords: UAV, SRTM, Topography, Geophysical Interpretation.Metode Geofisika bekerja dengan memanfaatkan parameter fisis diatas permukaan untuk pendugaan struktur bawah permukaan. Dalam tahapan interpretasi data, semua pengukuran 3D Geofisika; magnetic, gravity, magnetotelluric, dan airbone sangat membutuhkan keadaan geografis lapangan. Pada area yang luas, data DEM global digunakan untuk menjelaskan deskripsi lapangan, namun untuk pengukuran dekat permukaan yang bersifat lokal, data ini tidaklah efesien, karena resolusi yang relative rendah (15 – 30 m/px). Kami menggunakan teknologi UAV untuk menghasilkan topografi resolusi tinggi pada area pengukuran Geofisika dengan luas 500 x 600 m, yang disurvei untuk pemetaan batubara dibawah permukaan. Data UAV juga dibandingkan dengan topografi global SRTM (30 m/px) dan DEMNAS (8 m/px). Hasil pengolahan data menunjukkan data UAV menghasilkan topografi dengan resolusi 2.5 cm/px. Hasil overlay UAV dengan Geofisika magnetik mampu menjelaskan deskripsi lapangan dengan sangat baik dibandingkan DEM global, bahkan pada area yang relative kecil seperti singkapan batuabara (50x50 m) dapat menunjukkan keadaan perbedaan topografi dengan kontras. Berdasarkan data analysis, topografi UAV sangat potensial digunakan untuk interpretasi data Geofisika dekat permukaan yang diukur pada area yang relative lokal.Kata kunci: UAV, SRTM, Topografi, Interpretasi Geofisika.
Karakterisasi Sifat Fisik Batupasir Daerah Jantho dan Krueng Raya Menggunakan Uji Gelombang Ultrasonik Marwan Marwan; Rifqan Rifqan; Fadhli Syamsudin
POSITRON Vol 9, No 1 (2019): May Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (987.098 KB) | DOI: 10.26418/positron.v9i1.29843

Abstract

Penelitian sifat fisik batupasir daerah Jantho dan Krueng Raya dilakukan untuk mengetahui karakteristik batuan masing-masing daerah. Karakteristik batuan diamati melalui respon gelombang ultrasonik pada dua frekuensi berbeda untuk mengetahui nilai cepat rambat dan atenuasi gelombang. Sifat fisis yang diukur meliputi porositas, specific gravity, dan koefesien absorpsi. Hasil pengukuran menunjukkan nilai porositas batupasir daerah Jantho dan Krueng Raya memiliki nilai rata-rata 22% dan 25%. Respon cepat rambat yang dihasilkan pada sampel K16 (????=2,86%) dan K33 (????=8%) pada input frekuensi 1MHz bernilai 4040 m/s dan 3797 m/s, serta koefisien atenuasi bernilai 1,824. Sedangkan, respon cepat rambat yang diperoleh pada sampel Jantho tidak terdeteksi pada instrumen pengukuran. Keterbatasan penguatan sinyal dan tingginya kadar prositas tiap sampel berpengaruh besar pada tiap parameter yang diukur. Peninjauan terhadap jenis sampel yang lebih homogen dapat membantu pengamatan respon gelombang yang lebih baik.
Application of Magnetics Method to Mapping the Geothermal Source at Seulawah Agam Area Asrillah Asrillah; Marwan Marwan; Ibnu Rusydy; Gartika Setiya Nugraha
Jurnal Natural Volume 14, Number 2, September 2014
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (202.016 KB)

Abstract

Magnetic method had been employed at Seulawah Agam area in term of unveiling the potentially geothermal source. This method was carried out locally in both the geothermal filed of Heutsz’s Crater and Cempaga’s Crater where the locations are in Seulawah Agam slope which is included in Aceh Besar District. Geologically, the area is mainly controlled by volcanic mudflow and Lam Teuba’s rocks consisting of breccia, pumice and tuff and their age are from Tersier to Resen Period. The deployed equipment consisted of Magnetometer GSM-19T, Proton Sensors, Aluminum Stick, Connection Cable, GPS Antenna, Compass, and Watch. Portable GPS (Global Positioning System), Navigation type (map of the survey area), and complemented by the other technical equipment, such as handy talky, umbrella, pens and notes of observed data. This study was done by following two steps. At first, the base station was established as a reference point for all magnetic data of measurements. Furthermore, recording magnetic data at each point by repeating three times until the last point by following the looping pattern as pathway of measurement both in Heutsz’s crater whose nine point recordings and in Cempaga’s crater whose seventeen points was consecutively done. The data were simply processed by using Microsoft excel that can just plot the magnetic anomaly and interpreted qualitatively being preliminary research. The result showed that at the north pathway had high magnetic anomaly of rocks located at B6 point and it was assumed as the area having the economically mineral in fracture zones. The rocks with low a anomaly value were obtained at –F125 BR is suggested as the thermal sources while at the South pathway from observing station till the Cempaga’s crater was obtained the geological structure as the Sumatran Fault of Aceh’s segment at CK4 point and this finding showed similar correlation with the result of gravity survey at same pathway published in another paper. In conclusion, this method effectively showed that the Seulawah Agam has potency as thermal source.
A PRELIMINARY STUDY ON AQUIFER IDENTIFICATION BASED ON GEO-ELECTRICAL DATA IN BANDA ACEH, INDONESIA Didik Sugiyanto; Ibnu Rusydy; Marwan Marwan; Dian Mutia Hidayati; Asrillah Asrillah
Jurnal Natural Volume 18, Number 3, October 2018
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (556.282 KB) | DOI: 10.24815/jn.v18i3.11204

Abstract

The aquifers exploration has been conducted at the western part of Banda Aceh, Indonesia. This research aims to explore the aquifer layer beneath the surface and to obtain the cross-section model of the aquifer. The Vertical Electrical Sounding (VES) method was applied to investigate the aquifer layer. The VES method worked as the current penetrated into the ground using of two electrodes and the potential response due to its current being measured by another two electrodes. Ten grid points of VES has performed in western part of Krueng Aceh of Banda Aceh using the ARES (Automatic Resistivity Meter). The Res1Dinv and curve matching computer software used in VES data processing and analysis. The result shows the resistivity value of aquifer in Banda Aceh city at the range of 1 – 12 Ωm for freshwater, and 0.1 – 0.6 for brackish water layer. The first aquifer (water table) found at a depth of 0.5 to 2 meters beneath the surface. The 2-meters water table mostly located near the coastal zone or downstream zone of Krueng Aceh basin and shallow depth of 0.5 meters on the upstream. More than one aquifer layers were found beneath the surface, they were separated by aquitard layer consisting of silt to clay layers.
THE SUBSURFACE RESISTIVITY STUDIES IN GAMPONG JAWA WASTE DISPOSAL BANDA ACEH Fadhli Syamsuddin; Marwan Abu Bakar; Nur Mala
Jurnal Natural Volume 12, Number 1, March 2012
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (642.869 KB)

Abstract

The research has been carried out about determining the subsurface resistivity values by using the VLF method in waste disposal (TPA) Gampong Jawa Banda Aceh. Measurement target is for investigate allegations of contaminant substances are disposed by the public at these locations based on the response of the magnetic and electric fields. The tools used are the T-VLF device with two electrodes and using three stations, namely the transmitter JJF4 Japan, NWC Australia and UMS Moscow. Broad expanse of measurements on L1 and L2 is 200 m, L3 and L4 is 150 m. There are 74 measuring points with spacing of 10 m. The result of this experiment showed that the four layers can be divided into two layers with different resistivity values. The first layer at a depth of 0-15 m with apparent resistivity of 2-25 Ωm, allegedly at this layer contained the contaminant substances. The second layer at a depth of 15 m with apparent resistivity of 25-101 Ωm, in this layer are water-resistant coating that can withstand water into and out of the landfill.
Co-Authors Akmal Muhni Aman Yaman Aprilla Hasibuan Anggini Aprillino Wangsa Asrillah Asrillah Asrillah Asrillah Ayu Safrida Badrul Munir Darisma, Dian Dian Mutia Hidayati Didik Sugiyanto Dimas Kurnia Fadhli Syamsuddin Fadhli Syamsudin Faisal Abdullah Febrian Fitryanik Susanta Freddy Sapta Wirandha Gartika Setiya Nugraha Ibnu Rusydy Irhamni Irhamni Laksono Trisnantoro Laura Vadzla H Masyithah Masyitah Media Hanum Mieftah Oesanna Muchlis Muchlis Muhammad Kamal Muhammad Syukri Muhammad Syukri Muhammad Yanis Muhammad Yanis Muhibbuddin Muhibbuddin Muzakir Zainal Muzakir Zainal Muzakir Zainal Muzakir Zainal Nazli Ismail Nazli Ismail Nazli Ismail Nizzamuddin Nizzamuddin Nur Mala Nurlaili Nurlaili Nurul Aflah Oky Ikhramullah Rahmawati, Sri Rifqan, Rifqan Riki Andika Mulia Suhendrayatna Suhendrayatna Surbakti, Muhammad Syukri Susanti Alawiyah Sutopo, Sutopo Syafrizal Idris Syaiful Huzni Zuhri, Sarika Zul Fadhli