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Marwan Abu Bakar
Department Of Geophysical Engineering, Faculty Of Engineering, Universitas Syiah Kuala, Banda Aceh
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics Social Sciences Other

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Application of Resistivity Methods for Agriculture in Jaboi-Sabang Geothermal Area Marwan Abubakar; Didik Sugianto; Muzakir Zainal; Media Hanum
Journal of Aceh Physics Society Volume 7, Number 2, May 2018
Publisher : PSI-Aceh

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Abstract

Telah dilakukan pengukuran resistivitas tanah konfigurasi Wenner-Schlumberger pada lahan pertanian di kawasan panas bumi Jaboi, Sabang. Penelitian ini bertujuan untuk melihat struktur bawah permukaan agar jenis tumbuhan yang cocok pada lokasi tersebut dapat diidentifikasikan. Akuisisi data dilakukan pada 2 lintasan dengan panjang 300 dan 165 m dan jarak antar elektroda 15 m. Pengolahan data diproses menggunakan software RES2DINV dengan nilai RMS error sebesar 23,9% dan 14,8%. Hasil pemodelan 2D kedua lintasan tersebut diperoleh nilai resistivitas yang berkisar antara 1 - 250 Ωm. Nilai resistivitas ini dapat diintepretasikan sebagai tanah lempung berpasir (Sandy Clay), zona pelapukan (weathering zone) dan batuan andesit gunung api. Berdasarkan observasi lapangan, topografi lokasi penelitian didominasi oleh daerah rendah dengan suhu yang relatif panas. Secara keseluruhan baik itu dari jenis tanah, topografi maupun suhu, maka lokasi ini mempunyai prospek untuk dilakukan pengolahan lahan pertanian dengan jenis tanaman berupa tumbuhan pokok seperti padi dan tebu, serta tumbuhan palawija seperti jagung dan kacang hijau.Resistivity method on geothermal agricultural area in Jaboi-Sabang has been measured. This study is aimed to identify the suitable plant species in the area. The measurement was conducted in two profiles with 300 and 195 m and the spacing between electrodes is 15 m. The method measured apparent resistivity data along the profiles. The 2D resistivity models were inverted from the apparent resistivity data using Res2Div program with both of RMS error are 23.9% and 14.8%. The data shown the resistivity values range from 1-250 Ωm that can be interpreted as sandy clay, weathering zone, and volcanic andesitic rocks. Based on the soil type, topography and temperature we can conclude that the prospective plant in the area are rice, sugar, and all of palawija i.e. corn and green beans.Keywords: Resistivity, Agricultural, Geothermal, sandy clay, weathering zone 
Investigation of Shallow Fault Structures Using Ground Penetrating Radar Method in Gampong Pangwa Trienggadeng District, Pidie Jaya Regency Ayu Safrida; Nazli Ismail; Marwan Marwan
Journal of Aceh Physics Society Volume 8, Number 2, May 2019
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1338.614 KB) | DOI: 10.24815/jacps.v8i2.11200

Abstract

Wilayah Aceh merupakan wilayah yang sering terjadi gempa bumi dengan skala besar. Salah satu gempa bumi dengan skala besar adalah Gempa Pidie Jaya yang terjadi pada 7 Desember 2016. Setelah terjadi gempa bumi, banyak terjadi pergerakan tanah yang ditemukan di area penelitian. Telah dilakukan serangkaian pengukuran menggunakan Ground Penetrating Radar (80 MHz) untuk mempelajari struktur bawah permukaan setelah terjadinya gempa bumi. Penelitian ini dilakukan di Desa Pangwa, Kecamatan Trienggadeng, Kabupaten Pidie Jaya. Pengukuran dilakukan di sepanjang jalan di Desa Pangwa yang melintasi dua jembatan. Pengukuran dilakukan pada 18 lintasan dengan panjang masing–masing lintasan sepanjang 50 m. Pengolahan data dilakukan dengan menggunakan software GRED. Berdasarkan hasil radargram, kita menemukan struktur pemukaan dangkal berupa patahan di tengah gambaran radargram pada lintasan 13 yang disebabkan oleh terjadinya gempa di Pidie Jaya. The Aceh region is an area of frequent large-scale earthquakes. One of the earthquakes with a large scale is Pidie Jaya Earthquake that occurred on December 7, 2016. After the earthquake, many ground movement evidences were found in the area. The ground penetrating radar (80 MHz) measurement is used to study subsurface structures after the earthquake. This research was conducted in Pangwa Village, Trienggadeng Subdistrict, Pidie Jaya District. Measurements were carried out along the road in Pangwa Village which crossed two bridges. Data measurements were made along 18 profiles with 50 m length of each profile. Data processing were done by using GRED software. Based on processed radargrams, we found a fault trace at the middle of the profile lane 13 caused by the newest earthquake in Pidie Jaya. Keywords: Ground Penetrating Radar, Subsurface structure, electromagnetic wave velocity
Locating of Fault Zone at the Western of Seulawah Agam volcano Using Gravity Method Mieftah Oesanna; Nazli Ismail; Marwan Marwan
Journal of Aceh Physics Society Volume 7, Number 2, May 2018
Publisher : PSI-Aceh

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Abstract

Telah dilakukan survey metode gravitasi di sebelah barat Gunung Api Seulawah Agam, Aceh Besar, provinsi Aceh. Distribusi data percepatan gravitasi diukur dengan menggunakan alat Scrintrex CG-5. Pengukuran dilakukan pada satu lintasan dengan Jarak 27 km dan jumlah stasiun 52 buah. Nilai anomali Bouguer didapatkan setelah dilakukan beberapa standar koreksi data yaitu koreksi apungan, koreksi pasang surut, koreksi lintang, koreksi udara bebas, koreksi Bouguer, dan koreksi medan. Hasil interpretasi kualitatif data anomali Bouguer bahwa terindikasi pada jarak 36 - 37 km terdapat zona patahan. Lokasi ini sangat berhubungan dengan keberadaan manifestasi mata air panas Ie Ju di Lamteuba, Aceh Besar.Gravity survey has been done at the western part of Seulawah Agam volcano, Aceh Besar, Aceh Province. Variation of gravitational field data were measured using Scrintrex CG-5 instrument. The data were colected along 27 km lenght of profile with 52 stations but irregularly in spacing. The Bouguer anomaly values were obtained by drift, tide, latitude, free-air, Bouguer, and terrain corrections. Qualitative interpretation of Bouguer anomaly data show that the profile is crossed by a fault at distance of 36 - 37 km along the profile, i.e in between Lamteuba and Lampanah.Keywords: Gravity, Bouguer anomaly, fault, Seulawah AgamREFERENSIBennet, J. D et al. 1981. Peta Geologi Lembar Banda Aceh, Sumatera. Pusat Penelitian dan Pengembangan Geologi, Bandung.Caine, J. S., Evan J. P., Foster C. B. 1996. Fault Zone Architecture and Permeability Structure. Geology 24, 1025-1028Lillie, R. J. (1999). Whole earth geophysics. An Introductory Textbook for Geologists.Marwan, M., Rusydy, I., Nugraha, G. S., Asrillah, A. 2014. Study of Seulawah Agam’s Geothermal Source Using Gravity Method. Jurnal Natural, 14(2).Sieh, K., Natawidjaja, D. 2000. Neotectonics of the Sumatran fault, Indonesia. Journal of Geophysical Research: Solid Earth, 105(B12), 28295-28326.
A Field Survey of Soil Corrosivity Based on Electrical Resistivity Method Muzakir Zainal; Marwan Marwan
Journal of Aceh Physics Society Volume 8, Number 1, January 2019
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (449.327 KB) | DOI: 10.24815/jacps.v8i1.12768

Abstract

Salah satu upaya mitigasi bencana yang perlu dilakukan sebelum pembangunan fasilitas pada kawasan industri yaitu kajian korositivitas tanah. Sifat korositivitas dapat menyebabkan rusaknya infrastruktur bangunan dalam ambang batas tertentu, Kajian korositivitas tanah telah dilakukan pada kawasan industri Kecamatan Julok, Kabupaten Aceh Timur dengan tujuan untuk melakukan investigasi dan pemetaan tingkat korositivitas tanah menggunakan metode resistivitas Wenner 4 pin dan perhitungan pH meter untuk tanah. Akuisisi data dilakukan dengan titik pengukuran sebanyak tujuh titik, dimana setiap titik pengukuran data terdistribusi pada lokasi yang akan digunakan untuk pembangunan industri dengan total panjang lintasan pengukuran 6 km. Hasil pengolahan data resistivitas 1D diperoleh dua jenis pelapisan tanah. Lapisan pertama lebih didominasi oleh kondisi tanah yang tidak korosif dengan nilai resistivitas 20 – 580 Ohm.m. Sedangkan lapisan kedua dapat diduga sebagai lapisan yang korosif dengan nilai resistivitas tanah 5 – 20 Ohm.m. One of the disaster mitigation that needs to be done before facilities development in industrial area is study of soil corrosivity. Within a certain threshold, this corrosivity can cause damage to building infrastructure. This research was done in the industrial area of Julok Subdistrict, East Aceh Regency with the aim of investigating and mapping the level of soil corrosion using a 4-pin Wenner resistivity method and calculating the pH for soil. Data acquisition was carried out at seven measurement point, where each measurement point is distributed at a location that will be used for industrial development with 6 km length. Inversion of resistivity data gives two type of soil layer. The first layer is more complete by non-corrosive soil conditions with resistivity values of 20 - 580 Ohm.m. While the second layer can be interpreted as a corrosive layer with a soil resistivity value of 5-20 Ohm.m. Keywords: korosi, resistivitas, wenner, pH, mitigasi bencana
Quantitative Interpretation of Gravity Anomaly Data in Geothermal Field Seulawah Agam, Aceh Besar Aprillino Wangsa; Nazli Ismail; Marwan .
Journal of Aceh Physics Society Volume 7 Number 1, January 2018
Publisher : PSI-Aceh

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Abstract

Survei metode Gravitasi telah dilakukan di lapangan panas bumi Seulawah Agam, Aceh Besar, Provinsi Aceh untuk menentukan struktur bawah permukaan daerah tersebut. Distribusi percepatan gravitasi telah diukur dengan menggunakan instrumen Gravitimeter Scintrex CG-5. Pengukuran dilakukan pada dua lintasan. Lintasan pertama sepanjang 10 km dan lintasan kedua sepanjang 5,5 km dengan total panjang lintasan 15,5 km. Data diukur secara berturut-turut pada 33 titik dan 21 titik untuk lintasan pertama dan kedua. Untuk mendapatkan nilai Anomali Bouguer Lengkap, beberapa standar koreksi data diterapkan termasuk koreksi drift, koreksi pasang surut, koreksi lintang, koreksi udara bebas, koreksi Bouguer, dan koreksi medan. Data nilai Anomali Bouguer Lengkap sepanjang profil digunakan untuk pemodelan maju (forward modeling) 2D menggunakan software Grav2DC. Model menunjukkan bahwa struktur bawah permukaan daerah penelitian terdiri dari tiga lapisan. Lapisan paling atas ditafsirkan sebagai lapisan tufa pasiran (ρ = 2,09 g/cm3), dan diikuti oleh lapisan lempung dibawahnya (ρ = 2,02 g/cm3). Lapisan terbawah diduga sebagai breksi vulkanik (ρ = 2,17 g/cm3). Breksi vulkanik dapat dianggap sebagai lapisan reservoir dan lapisan clay sebagai lapisan penutup (cap rock) pada sistem panas bumi di Gunung Api Seulawah Agam.Kata Kunci: Metode Gravitasi, Densitas, Grav2DC, Sistem Panas Bumi, Seulawah AgamSurvey on gravity method has been done in Seulawah Agam geothermal field, Aceh Besar, Aceh Province to determine the subsurface structure of the area. We have measured distribution of acceleration gravity using Gravitimeter Scintrex CG-5 instrument. The measurements were carried out along two profiles. Length of the first profile is 10 km and the second profil is 5,5 km with the total profile length is 15,5 km. The data were measured at 33 and 21 stations for the first and the second profile respectively. In order to obtain a Complete Bouguer Anomaly value, some standard data corrections were applied including drift correction, tidal correction, latitude correction, free air correction, Bouguer correction and terrain correction. Complete Bouguer Anomaly value data along the profile were use for 2D forward modeling using Grav2DC software. The models show that subsurface structure of the area consist of 3 layers. The upper most layer is interpreted as sandyceous tuffastones (ρ = 2,09 g/cm3), and followed by underlaying clay layer (ρ = 2,02 g/cm3). The lowest layer is expected as volcanic breccias (ρ = 2,17 g/cm3). The volcanic breccias can be considered as reservoir and the clay layer as a cap rock in geothermal system of Seulawah Agam vulcano.Keywords: Gravity Method, Density, Grav2DC, Geothermal System, Seulawah AgamREFERENSIBennett, J.D., dkk. 1981. Peta Geologi Lembar Banda Aceh, Sumatera. Bandung: Pusat Penelitian dan Pengembangan Geologi.Hidayat, N dan Basid, A. 2011. Analisis Anomali Gravitasi Sebagai Acuan Dalam Penentuan Struktur Geologi Bawah Permukaan dan Potensi Geothermal, Jurnal Neutrino, 4.1,p-36.Muzakir. 2014. Investigasi Struktur 2D Lapangan Panasbumi Seulawah Agam Berdasarkan Data Pengukuran Magnetotellurik. Skripsi. Universitas Syiah Kuala, Banda Aceh.Saptadji, N. M. 2001. Teknik Panas Bumi. Departemen Teknik Perminyakan Fakultas Ilmu Kebumian dan Teknologi Mineral. Institut Teknologi Bandung: Bandung.Yu, G., He, Z. X., Hu, Z.Z., borbergsdottir, I. M., Strack, K. –M., dan Tulinius, H.2009. Geothermal Exploration Using MT and Gravity Techniques at Szentlorinc Area in Hungary - SEG 2009 International Expoloration and Annuad Meeting. Houston. P-4333
Geological Structure Analysis of Satellit Gravity Data in Oil and Gas Prospect Area of West Aceh-Indonesia Dian Darisma; Marwan Marwan; Nazli Ismail
Journal of Aceh Physics Society Volume 8, Number 1, January 2019
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (618.752 KB) | DOI: 10.24815/jacps.v8i1.12750

Abstract

Estimation of the subsurface geological structures in oil and gas prospect area of West Aceh has been done by utilizing gravity field anomaly of satellite gravity data. This research aim to analyze satellite gravity data in order to get geological features which is include deep and shallow structure or fault around oil and gas prospect area in West Aceh. The satellite gravity data is originally provided as Free Air Anomaly and should be corrected to get Complete Bouguer Anomaly (CBA). Furthermore, CBA was transformed into a horizontal plane and corrected from regional anomalous effects to obtain residual anomaly, horizontal and vertical derivative. From CBA, the gravity anomaly show good correlation with geological boundaries on different rock formation and the anomaly is decrease from NE-SW. Residual anomaly also gives same information with CBA but this anomaly focus on shallow structure. Furthermore, horizontal derivative and vertical derivative also show good correlation with geological structure or fault but in some areas the anomaly related with deep structure cannot be seen on the surface or geological map. Despite the result cannot correlate directly with oil and gas prospect area, satellite gravity can be used to identify gravity anomaly and also fault that related with hydrocarbon anomaly area
Application of Geoelectrical Resistivity Method to See Groundwater Condition in District of Meuraxa, Banda Aceh After 11 Years of Tsunami Disaster of Aceh Laura Vadzla H; Dimas Kurnia; Riki Andika Mulia; Marwan Marwan
Journal of Aceh Physics Society Volume 6 Number 2, September 2017
Publisher : PSI-Aceh

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Abstract

Identifikasi kondisi lapisan air tanah di Kecamatan Meuraxa, Banda Aceh menggunakan metode geolistrik resistivitas konfigurasi Wenner-Schlumberger telah dilakukan setelah 11 tahun bencana tsunami di provinsi Aceh. Resistivitimeter ARES buatan GF Instrument digunakan untuk mendapatkan variasi nilai resistivitas. Tiga lintasan pengukuran dengan panjang 200 dan 300 m ditentukan untuk memperoleh informasi bawah permukaan. Pengolahan dan pemodelan data menggunakan software Res2dinv. Pemodelan data menunjukan distribusi nilai resistivitas secara umum 0–374 Ωm dapat diidentifikasikan sebagai Alluvium yang bersesuaian untuk semua lintasan. Namun pada lapisan tertentu terdapat intrusi air laut yang ditunjukkan dengan nilai resistivitas rendah yaitu 0–5 Ωm. Hasil studi menunjukkan bahwa bencana Gempa Bumi dan Tsunami Aceh tidak berdampak terhadap kondisi lapisan akuifer, intrusi air laut dimungkinkan akibat oleh masuknya air laut melalui rekahan atau celah-celah yang menembus lapisan akuifer.Kata kunci: Tsunami, metode geolistrik, resistivitas, akuifer Identification of conditions ground water in District of Meuraxa, Banda Aceh using the GeoElectrical resistivity method with Wenner-Schlumberger array has been done after 11 years of tsunami disaster in Aceh province. Resistivitimeter of ARES made by GF Instrument is used to obtain values of resistivity variation. The measurement of three line with a length of 200 and 300 metres are choose to obtain subsurface information. Processing and modeling data is using Res2dinv software. Modeling data indicates the distribution of the resistivity values in General 0–374 Ωm can be identified as a corresponding Alluvium for all line. But in particular there is a layer of sea-water intrusion, indicated by a low resistivity value i.e. 0–5 Ωm. The devastating earthquake and Tsunami in Aceh does not affect the condition of the lining of the aquifer, sea-water intrusion is possible due to the influx of sea water by through fissures or cracks that penetrate the layers of the aquifer.Keywords: Tsunami, geoelectrical method, resistivity, aquiferREFERENSIAhyar, N. 2015. Analisa Perubahan Garis Pantai Pasca Tsunami di Wilayah Banda Aceh dan Aceh Besar. Skripsi. Fakultas MIPA, Universitas Syiah Kuala.Bennet, J. D et al. 1981. Peta Geologi Lembar Banda Aceh, Sumatera. Pusat Penelitian dan Pengembangan Geologi, Bandung.Davis, N. S., DeWiest, R. J. M. 1966. Hydrogeologi. John Wiley Son, Inc.Fetter, C. W. 1994. Applied Hidrogeology 3rd Edition. Prentice Hal, Englewood Cliffd, New Jersey.Kanata, B., dan Zubaidah, T. 2008. Aplikasi Metode Geolistrik Tahanan Jenis Konfigurasi Wennerschlumberger Untuk Survey Pipa Bawah Permukaan. Jurnal Teknik Elektro, Vol. 7 No. 2.Kodoatie, J. R. 2010. Tata Ruang Air Tanah. Penerbit Andi, Yogyakarta.Pemerintahan Kota Banda Aceh. 2009. Rencana Tata Ruang Wilayah (RTRW) Kota Banda Aceh 2009-2029. http://www.penataanruang.com/nad1.html, tanggal akses 14 Juni 2017.Pemeritah Republik Indonesia. 2008. Peraturan Pemerintah Republik Indonesia Nomor 43 Tahun 2008 tentang Air Tanah. Lembaran Negara RI Tahun 2003, Nomor 4859. Sekretariat Negara, Jakarta.Sehah., dan Aziz, A. N. 2016. Pendugaan Kedalaman Air Tanah Menggunakan Metode Geolistrik Konfigurasi Schlumberger di Desa Bojongsari Kecamatan Alian Kabupaten Kebumen. Jurnal Neutrino, Vol 8, No. 2.Telford, M. W, et al. 1976. Applied Geophysic. Cambridge University Press.Utama, W. 2005. Experimental Module Mataram Geophysical Workshop. Laboratorium Geofisika FMIPA, Institut Teknologi Surabaya.
Reduced to the Pole of Total Magnetic field Anomaly of Seulawah Agam Volcano, Aceh Besar Masyithah Masyitah; Nazli Ismail; Marwan Marwan
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

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Abstract

Telah dilakukan penelitian dengan menggunakan metode magnetik pada kawasan Gunung Api Seulawah Agam, Aceh Besar untuk mempelajari respon anomali medan magnetik total berdasarkan hasil transformasi reduksi ke kutub. Akuisisi data medan magnetik total digunakan peralatan GEM System Proton Precission Magnetometer (PPM). Data diukur dalam bentuk lintasan, dengan panjang lintasan 16 km dan banyaknya titik pengukuran berjumlah 33 titik. Untuk mendapatkan anomali medan magnetik total dilakukan koreksi diurnal dan koreksi IGRF (International Geomagnetic Reference Field). Data anomali medan magnetik total dilakukan pengolahan lanjutan dengan transformasi reduksi ke kutub untuk memudahkan dalam interpretasi. Berdasarkan hasil interpretasi kualitatif, didapat pola anomali medan magnetik total reduksi ke kutub dengan respon anomali maksimum dan minimum yang langsung menunjukkan posisi sumber penyebab anomali dan kesesuaian dengan struktur patahan yang ada pada kawasan penelitian.Survey of magnetic method has been done at Seulawah Agam volcano, Aceh Besar. The survey is aimed to analysis reduction to the pole of total magnetic field anomaly. The total magnetic field data were acquired using GEM System Proton Precission Magnetometer (PPM) unit. The Measurements were performed along a profile with 16 km length and 33 stations. Total magnetic field anomaly data were calculated from the measured data by diurnal and IGRF (International Geomagnetic Reference Field) corrections. The total magnetic field anomaly data reduced to the pole for a better interpretaion. The reduced to the pole of total magnetic field anomaly data show a good agreement with geological structures and existence of faults in the area of study.Keywords: Magnetic method, total magnetic field anomaly, reduction to pole, Seulawah Agam
Comparison of Accuracy Aerial Photography UAV (Unmanned Aerial Vehicle) and GNSS (Global Navigation Satelitte System) for Mapping of Lambarih Village, Aceh Besar, Aceh Marwan Marwan; Freddy Sapta Wirandha; Nizzamuddin Nizzamuddin; Febrian Fitryanik Susanta
Journal of Aceh Physics Society Volume 9, Number 3, September 2020
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jacps.v9i3.17151

Abstract

UAV (Unmaned Aerial Vehicle) atau yang biasa disebut drone saat ini telah banyak digunakan untuk pemetaan wilayah di Indonesia. Salah satu metode penentuan posisi satelit GNSS (Global Navigation Satelitte System) yaitu dengan metode statik. Penelitian ini mengkaji perbadingan ketelitian foto udara UAV dan foto udara UAV yang telah diikatkan dengan GNSS. Tahapan awal dalam penelitian ini adalah dilakukan pengambilan foto udara UAV wilayah Gampong Lambarih, kemudian dilakukan pengambilan data GNSS di lapangan sebanyak 4 titik di kawasan Gampong Lambarih, Aceh Besar dengan menggunakan titik kontrol atau titik ikat stasiun CBDA dengan doy 040 di Jantho. Tiap titik pengamatan dilakukan selama 30 menit dengan interval waktu pengukuran 1 detik. Pengolahan data UAV menggunakan aplikasi Agisoft dan pengolahan data GNSS menggunakan aplikasi HiTarget Geomatic Office (HGO) dan Website BIG. Hasil penelitian menunjukkan foto udara UAV yang diikat dengan GNSS memiliki ketelitian yang lebih tinggi yaitu mecapai ketelitian orde mm. UAV (Unmaned Aerial Vehicle) or what is commonly called a drone is currently widely used for regional mapping in Indonesia. One method of determining the position of the GNSS (Global Navigation Satelitte System) satellite is the static method. This study examines the comparison of the accuracy of UAV aerial photographs and UAV aerial photographs that have been tied to GNSS. The initial stage in this research was to take aerial photographs of the UAV of the Lambarih Village area. Then the GNSS data collection was carried out in the field as many as 4 points in the Gampong Lambarih area, Aceh Besar using the control point or tie point of the CBDA station with doy 040 in Jantho. Each observation point was carried out for 30 minutes with a measurement time interval of 1 second. UAV data processing uses the Agisoft application and GNSS data processing using the HiTarget Geomatic Office (HGO) application and the BIG Website. The results showed that aerial photographs of UAVs bound with GNSS had a higher accuracy reaching in order of mm. Keywords: GNSS, UAV, Statik, BIG, HGO
Identification of Aquifer Layer Based on 2D Resistivity Data in Lhokseumawe Aceh-Indonesia zul Fadhli; Muhammad Syukri; Marwan Marwan
Journal of Aceh Physics Society Volume 8, Number 3, September 2019
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jacps.v8i3.14518

Abstract

Penelitian untuk mengidentifikasi keberadaan air tanah dan kedalaman akuifer telah dilakukan di wilayah KEK Arun Lhokseumawe Provinsi Aceh dengan kondisi geologi daerah penelitian adalah batuan lanauan dan batuan lempung serta geomorfologinya berupa perkebunan dan sungai buatan. Penelitian ini mengaplikasikan metode geolistrik resistivitas 2D dengan konfigurasi Wenner-Schlumberger. Akuisisi data di lapangan menggunakan alat SuperSting R8 yang keseluruhannya mempunyai 4 lintasan pengukuran dengan lintasan 1 dan 2 memotong lintasan 3 dan 4, panjang masing-masing lintasan pengukuran tersebut adalah 400 m. Pemprosesan data Hasil akuisisi di lapangan menggunakan software Res2dinv untuk menampilkan model 2D bawah permukaan di lokasi penelitian. Hasil interpretasi menunjukkan lintasan L1 pada kedalaman sampai dengan 70 m terdapat lempung berpasir, lanauan dan gravel. Terdapatnya pengaruh instrusi air laut pada kedalaman 25 m yang ditandai dengan nilai resistivitas 1 Ώm. Lapisan akuifer di identifikasi pada jarak bentangan 100 - 200 m dan pada kedalaman 60 m dengan nilai resistivitas 30 Ωm. Penampang lintasan 3 dan 4 tidak menunjukkan adanya lapisan akuifer yang layak untuk diexploitasi pada lintasan tersebut. Interpretasi lintasan L4 menunjukkan adanya intrusi air laut yang besar pada lapisan pertama. Terdapat 3 lapisan yang kontras yaitu lapisan lempung berpasir, gravel/lempung lanauan dan batuan dasar. Lapisan akuifer pada lintasan 4 diinterpretasikan berada pada kedalaman 70 m dengan nilai resistivitas 30 Ωm. Rekomendasi yang paling layak untuk lokasi pengeboran yaitu pada lintasan 4 pada jarak bentangan 180 m dengan jenis akuifer tertekan. The research to identified ground water and depth of aquifer was conducted in KEK Arun Lhokseumawe Aceh Province. The geology contained siltstone and clay with geomorphology area are plantation and artificial river. The 2D resistivity acquisition was using Supersting R8 equipment with Wenner-Schlumberger array. There are 4 survey lines that conducted in the area where line 1 and 2 were crossed with line 3 and 4. The length of each line is 400 m respectively. The data processing was using Res2dinv software to shows 2D subsurface model. The result shown that line 1 is sandy clay, siltstone and gravel at depths up to 70 m. It was influenced by sea water at depth 25 m with resistivity value of 1 Ωm. The aquifer layer was identified at depth 60 m with resistivity value of 30 Ωm. However, line 3 and 4 were presented that the area surveys are suitable for exploration which have not indicate the existence of an aquifer layer. In the last line, it shown sea water intrusion at the first layer. There are 3 layers that contained in line 4 which is clayey sand, gravel and bedrock. The aquifer layer at Line 4 was interpreted at depth 70 m with resistivity value of 30 Ωm. The most feasible recommendation for a drilling location is on Line L4 at a distance of 180 m with a confined aquifer type. Keywords: Aquifer, Resistivity, Lhokseumawe, ground water, sand
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