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All Journal BERKALA FISIKA Jurnal Penelitian Fisika dan Aplikasinya (JPFA) TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Jurnal RISET Geologi dan Pertambangan JGE (Jurnal Geofisika Eksplorasi) Scientific Journal of Informatics JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Journal of Geoscience, Engineering, Environment, and Technology BULLETIN OF THE MARINE GEOLOGY INSIST (International Series on Interdisciplinary Research) Indonesian Physical Review Jurnal Teori dan Aplikasi Fisika Jurnal Geosains dan Remote Sensing (JGRS) Jurnal Profesi Insinyur Universitas Lampung Journal of Applied Science, Engineering and Technology (J. ASET) Seminar Nasional Insinyur Profesional (SNIP) Prosiding Seminar Nasional Hasil Penelitian Sains, Teknik dan Aplikasi Industri Fakultas Teknik Universitas Lampung Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Jurnal Teknologi dan Inovasi Industri Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Nemui Nyimah
Muh Sarkowi
Program Studi Teknik Geofisika, Fakultas Teknik Universitas Lampung, , Jl. Prof. Soemantri Brodjonegoro No. 1, Bandar Lampung, Telp. (0721)703475-708.
Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Other

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GRAV3D Validation using Generalized Cross-Validation (GCV) Algorithm by Lower Bounds Approach for 3D Gravity Data Inversion Adhi, Mochamad Aryono; Wahyudi, Wahyudi; Suryanto, Wiwit; Sarkowi, Muh
Scientific Journal of Informatics Vol 5, No 2 (2018): November 2018
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v5i2.16736

Abstract

The completion of gravitational data inversion results in a smooth recovered model. GRAV3D is one software that can be used to solve 3D inversion problems of gravity data. Nevertheless there are still fundamental problems related to how to ensure the validity of GRAV3D to be used in 3D inversion. One approach used is to use lower bounds as inversion parameters. In this study lower bounds are set from  to . The results obtained show that the use of lower bounds decreases resulting in a larger data misfit which means that the more data that meets the tolerance calculation, the better recovered model produced.
Identifikasi Gas Biogenik pada Rekaman Seismik Pantul Dangkal Saluran Tunggal di Daerah Perairan Balikpapan Kalimantan Timur OctariaSurajaya, Tiara; Sarkowi, Muh
Jurnal Teori dan Aplikasi Fisika Vol 2, No 1 (2014): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v2i1.1253

Abstract

Penelitian mengenai keberadaan gas biogenik di daerah Perairan Balikpapan Kalimantan Timur bertujuan untuk mencari energi alternatif sebagai pengganti migas. Terjadinya gas biogenik yaitu dari unsur organik marin terutama fitoplangton dan unsur organik darat berupa material darat berupa material tanaman dari dataran tinggi kemudian diendapkan di laut sejalan dengan proses naik turunnya muka laut pada masa glasial. Hasil interpretasi seismik pantul dangkal saluran tunggal di daerah penelitian mengindikasikan, bahwa gas biogenik terdapat pada beberapa lintasan terutama Lintasan L-3 berarah Timur-Barat. Pada daerah penelitian Lintasan L-3 berarah Timur-Barat terdapat 3 – 4 lapisan bawah laut dengan kedalaman berkisar 1,3 meter sampai 10 meter. Dan memiliki kedalaman daerah gas biogenik 8,2 meter.
Interpretasi Struktur Bawah Permukaan Daerah Gunung Merbabu – Merapi Berdasarkan Pemodelan 3D Anomali Bouguer Sarkowi, Muh
BERKALA FISIKA Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (527.186 KB)

Abstract

Mount Merbabu represent the volcano which keep a lot of mystery because its activity not many known by vulcanology expert. At least existing data about activity of Mount Merbabu cause the its activity characteristic not yet can be expressed surely. Study [of] about characteristic of Mount Merbabu needed to to learn the nature of vulcanisme activity so that action prevetive fall the victim and disaster mitigation can be done early possible.  While the Mount of Merapi represent the most active volcano in the world. In Its activity, eruption Merapi Mount  yield the hot cloud (wedus gembel) with the temperature 3000 º C to  glide the mean reach the distance 4-5 km. In this research we have been done modeling and interpretation of Bouguer anomaly around  Mt. Merapi and Merbabu. Result of research indicate that Mt. Merapi and Merbabu have the negative anomaly which because of existence  magma chamber. The magma chamber in Mt. Merapi have a convex form with the deepnes from 500 – 6000 meter from meas sea level, while the magma chamber in Mt. Merbabu have the same from but rather minimize with the deppnes magma chamber about 1000 – 4000 meter from means sea level.  Magma chamber in Mt. Merapi caontain liquid magma while the solid magma in Mt. Merbabu.   Keywords : Mount Merapi, Mount Merbabu, Gravity
GRAV3D Validation using Generalized Cross-Validation (GCV) Algorithm by Lower Bounds Approach for 3D Gravity Data Inversion Adhi, Mochamad Aryono; Wahyudi, Wahyudi; Suryanto, Wiwit; Sarkowi, Muh
Scientific Journal of Informatics Vol 5, No 2 (2018): November 2018
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v5i2.16736

Abstract

The completion of gravitational data inversion results in a smooth recovered model. GRAV3D is one software that can be used to solve 3D inversion problems of gravity data. Nevertheless there are still fundamental problems related to how to ensure the validity of GRAV3D to be used in 3D inversion. One approach used is to use lower bounds as inversion parameters. In this study lower bounds are set from  to . The results obtained show that the use of lower bounds decreases resulting in a larger data misfit which means that the more data that meets the tolerance calculation, the better recovered model produced.
Radial Derivative and Radial Inversion for Interpreting 4D Gravity Anomaly Due to Fluids Injection Around Reservoir Muhammad Zuhdi; Sismanto Sismanto; Ari Setiawan; Jarot Setyowiyoto; Adi Susilo; Muhammad Sarkowi
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 6: December 2018
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v16i6.9468

Abstract

The 4D gravity or time lapse gravity has been used many reseracher to identify fluid injection in oil reservoir. The objective of this study is to find the better way in interpreting 4D gravity anomaly due to fluid injection around the reservoir. Radial Derivatives are derivative values of gravity anomalies against horizontal distances in the radial direction. Radial inversion is a two-dimensional inversion of lines with radial directions resulting in a 3-dimension model. Time lapse microgravity research have been performed in “X Oil Field” with amount of 604 data point covering area of 4000m x 5000m. This Radial derivative and Radial inversion have been aplied at an injection well of the X oil field. The yield show that 4D gravity anomaly value due to injection is 0.02 mGal to 0.36 mGal. Radial derivative value in the area is 0 micro Gal/cm to 0,012 mGal/meter. Radial inversion shows radius of fluid front movement is 304 meters to 1120 meters. Radial derivative and Radial inversion have been proven fairly good to identify injected fluid movement in the reservoir.
PELATIHAN OLIMPIADE KEBUMIAN BAGI GURU PEMBIMBING OLIMPIADE KEBUMIAN DI SMAN 2 KOTA BANDAR LAMPUNG Rahmi Mulyasari; Akroma Hidayatika; Karyanto Karyanto; Muh Sarkowi; I Gede Boy Darmawan
Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Vol 4 No 3 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jss.v4i3.233

Abstract

Olimpiade Kebumian merupakan salah satu ajang kompetisi akademik yang di agendakan rutin tahunan. Kendala muncul dari para guru yang mengalami kesulitan dalam memberikan materi kepada peserta didik olimpiade kebumian dikarenakan latar belakang pendidikan para guru yang tidak spesifik di ilmu kebumian, sebagian berasal dari pendidikan geografi dan fisika. Melalui kegiatan Program Pengabdian Masyarakat, Fakultas Teknik dalam hal ini diwakili oleh tim dosen dari Program Studi Teknik Geofisika melakukan pelatihan untuk memudahkan pemahaman materi Olimpiade Sains Nasional bidang Kebumian. Selain itu dapat pula menumbuhkan motivasi dan daya saing untuk mengikuti kompetisi, khususnya kepada siswa SLTA di Kota Bandar Lampung. Kegiatan pengabdian dilakukan pada tanggal 9 Juli 2020 di SMAN 2 Kota Bandar lampung dengan peserta pelatiahan merupakan guru-guru pelatih Olimpiade Kebumian se-Kota Bandar Lampung. Tujuan kegiatan pengabdian ini untuk meningkatkan kemampuan guru pembimbing dalam mendalami materi olimpiade kebumian, memberikan pengetahuan dasar geologi sebagai bagian dari ilmu kebumian, memberikan kisi-kisi materi yang diujikan dalam olimpiade sains nasional kebumian, serta memberikan praktek identifikasi mineral dan batuan. Hasil dari kegiatan pengabdian tergambar dari kuisioner menunjukkan respon yang positif. Peserta pelatihan berharap untuk dilakukannya kegiatan pelatihan lanjutan dan pembuatan buku panduan terkait materi dan soal-soal olimpiade.
Peningkatan Partisipasi Masayarakat pada Studi Pemetaan Partisipatif dalam Pembuatan Jalur Evakuasi Bencana Tsunami di Desa Wisata Pagar Jaya Rahmat Catur Wibowo; Karyanto Karyanto; Ahmad Zaenudin; Muh Sarkowi
Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Vol 4 No 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jss.v4i1.172

Abstract

Desa wisata Pagar Jaya memiliki beberapa obyek geowisata yang sangat menarik untuk dikunjungi seperti: Dinding Dasit, Pantai T. Indah, Pantai T. Hantu, dan Batu Wayang. Semua obyek geowisata tersebut berada di area pesisir dan sangat rentan terhadap ancaman bencana tsunami. Nilai penting dari proses partisipatif dalam kajian risiko bencana adalah mewadahi masyarakat dalam mengambil keputusan dan merumuskan tindakan prioritas pengurangan risiko bencana. Tujuan dari pengabdian ini adalah: memetakan kondisi eksisting obyek geowisata Dinding Dasit, Teluk Indah, Teluk Hantu, dan Batu Wayang berbasis geospasial, mengedukasi masyarakat akan prinsip-prinsip mitigasi bencana tsunami, dan mengintegrasikan data geospasial dan nonspasial dari kelompok masyarakat dalam pembuatan jalur evakuasi bencana tsunami di Desa Wisata Pagar Jaya. Kelompok masyarakat yang tergabung dalam Kelompok Sadar Wisata (Pokdarwis) Desa Wisata Pagar Jaya merupakan subjek utama dalam proses pemetaan partisipatif. Proses pemetaan melalui tahap Focus Group Discussion dan in-depth interview berkaitan dengan risiko bencana dan jalur evakuasi. Sistem Informasi Geografis kemudian mentransformasikan hasil pemetaan partsipatif dalam bentuk digital. Hasil dari penelitian ini adalah peta partisipatif jalur evakuasi untuk bencana tsunami di Desa Pagar Jaya yang secara geografis berada di pesisir selatan Pulau Sumatera.
Studi Pemetaan Partisipatif Melalui Pemberdayaan Masyarakat Lokal Dalam Pembuatan Peta Geowisata Berbasis Konservasi Sumber Mata Air Guna Mewujudkan Desa Sukaraja Sebagai Destinasi Wisata Utama di Kabupaten Tanggamus Rahmat Catur Wibowo; Muh Sarkowi
Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Vol 6 No 1 (2022)
Publisher : Lembaga Penelitian dan Pengabdian Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jss.v6i1.327

Abstract

Kawasan mata air Way Bekhak di Desa Sukaraja Kecamatan Gunung Alip Kabupaten Tanggamus memiliki potensi sebagai tujuan geowisata. Beberapa upaya yang telah dilakukan untuk memetakan kawasan mata air di wilayah hutan lindung Tanggamus, akan tetapi sangat sedikit kegiatan tersebut berhasil. Sifat hidrogeologi mata air yang ada di kawasan hutan lindung yang dekat dengan permukiman warga menyebabkannya sangat rentan terhadap gangguan atau kerusakan. Mengingat pentingnya keberadaan dan peranan ekosistem mata air bagi daerah hutan lindung sebagai kawasan geowisata, maka penataan dan pengelolaan mata air yang sesuai dengan sifat dan karakteristiknya sangat perlu dilakukan. Dalam hal ini, salah satu upaya yang diperlukan adalah kegiatan pemetaan mata air Way Bekhak untuk keperluan geowisata. Untuk mendukung kegiatan tersebut, diperlukan kegiatan sosialisasi, pelatihan rehabilitasi hutan yang dapat dilakukan oleh masyarakat agar dapat tumbuh dan berkembang sesuai yang diharapkan, sehingga kawasan ini dapat dijadikan sebagai tempat wisata yang efektif dan berkelanjutan. Metode yang digunakan dalam rangka memetakan kawasan ekosistem mata air Way Bekhak bersifat deskriptif dengan pendekatan partisipatif yaitu melalui pendekatan sosialisasi, penyuluhan dan pembentukan kelompok binaan, penanaman, hingga pemeliharaan. Hasil yang dicapai pada pengabdian ini berupa rencana pengembangan kawasan mata air Way Bekhak, terwujudnya penguatan kapasitas kelembagaan, sehingga masyarakat mampu swamandiri di berbagai bidang.
Geothermal Reservoir Identification based on Gravity Data Analysis in Rajabasa Area- Lampung Muh Sarkowi; Rahmat Catur Wibowo
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 31, No 2 (2021)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2021.v31.1164

Abstract

Gravity research in the Rajabasa geothermal prospect area was conducted to determine geothermalreservoirs and faults as reservoir boundaries. The research includes spectrum analysis and separation of the Bouguer anomaly to obtain a residual Bouguer anomaly, gradient analysis using the second vertical derivative (SVD) technique to identify fault structures or lithological contact, and 3D inversion modeling of the residual Bouguer anomaly to obtain a 3D density distribution subsurface model. Analysis was performed based on all results with supplementary data from geology, geochemistry, micro-earthquake (MEQ) epicenter distribution map, and magnetotelluric (MT) inversion profiles. The study found 3 (three) geothermal reservoirs in Mount Balirang, west of Mount Rajabasa, and south of Pangkul Hot Spring, with a depth of around 1,000-1,500 m from the ground level. Fault structures and lithologies separate the three reservoirs. The location of the reservoir in the Balirang mountain area corresponds to the model data from MEQ, temperature, and magnetotelluric resistivity data. The heat source of the geothermal system is under Mount Rajabasa, which is indicated by the presence of high-density values (might be frozen residual magma), high-temperature values, and the high number of micro-earthquakes epicenters below the peak of Mount Rajabasa.
2D Groundwater Depth for Analysis of The Zone Unconfined Aquifer M Juandi; Muh Sarkowi
INSIST Vol 1, No 1 (2016)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (125.959 KB) | DOI: 10.23960/ins.v1i1.10

Abstract

Abstract—Changes in land use have occurred quite significant in the city of Pekanbaru. The increasing of building spaces, the decreasing of plantations and forests are continues to grow with the increasing of population and industries. This means, it can cause impact on   groundwater resources. This condition shall continue in effect, along with the population and industrial growth. This means, it can cause impact on   groundwater resources of Pekanbaru City, thus the analysis of groundwater zone of Pekanbaru city is needed. The data used in this research is related with the biophysical and social economic. Data analysis method was using numeric simulation programming using finite difference method. The results showed that in 2016, its depth ranges between 16-46 m, this indicates that the unconfined aquifer was in trapped position but not included to the confined aquifer system. In 2017, it was predicted that the depth is about 6-38 m, and in 2018 the depth of unconfined aquifer will go deeper to 31,4-34 m. This is influenced by the changes of population and industrial and the automation of extraction of groundwater by those population and industrial is getting bigger. While in 2019 and 2020, the depth of the unconfined aquifer will be between 41,8-44,4 m and 44-46,8 m. It was predicted that the growth of population and industries will grow rapidly in the future. This rapid growth will cause the damage of the aquifer.   Keywords—Zone, groundwater, numerical method.
Co-Authors Abdul Latief Gunawan Adi Susilo agung setiawan Agus Kuswanto AGUS SETIAWAN Agustin, Erisa Ahmad Zaenudin Ahmad Zaenudin Akroma Hidayatika Aldika Rizkiano Aldika Rizkiano Aleksander Purba Ari Setiawan Aryono Adhi, Aryono Azrin Merdi Isman Bagus Sapto Mulyanto Bagus Sapto Mulyanto Bagus Sapto Mulyatno Basuki, Kelik Hendro Budiman Budiman Dani, Ilham Darmawan, I Gede Boy Daru Adi Dewi, Soraya Tiana Dikpride Despa Dikpride Despa Dikpride Despa Ecca Urbita Kanedi Saihu Egi Ramdhani Fandra, Bobby Firmando Huda Utama Halim, Muhammad Rizqi Hariani, Pepi Herri Wardono Herry Wardono Hidayatika, Akroma I Gede Boy Darmawan Ika Kustiana Ika Kustiani IMAM SANTIKO RAHARJO Imam Setiadi Indra Arifianto Indragiri, N Muhammad Irza Sukmana Ismail Istifani Ferucha Jarot Setyowiyoto Juandi Juandi Karyanto, Karyanto Karyanto, Karyanto Kumalasari, Isti Nur Kuncoro, Kirana Helga Aimee Kurnia, Yoga Lukman, Ernis Mahmud Yusuf MARDIANA Mardiana Mardiana Maulia, Ikram Mohd Harizalsyah Muhammad Eddy Darmansyah Muhammad Zuhdi Mulyasari, Rahmi Mulyatno, Bagus S Murti , Antonius Hary Nandi Haerudin NICO ARDIATMA OKTAVIO OctariaSurajaya, Tiara Ordas Dewanto Otten Rinaldi Putera, Adimas Bayu Ardian Rafi Rilo Pambudi Rahmi Mulyasari Ratna Widiyawati Ratna Widyawati Regina Febryzha Sawitri Restu Ningsih Ria Oktaviani Sinia Riri Arinda Adama Risgiyanto Risgiyanto Roy Irawan Saihu, Ecca Urbita Kanedi Salamah, Ummi Sari Utama Dewi Sawitri, Regina Febryzha Sismanto Sismanto Sopan, Langnanda Ekakurnia Putri Srianti, Ririn Suharno Suharno Suharno Suharno Suharno Suhartomo, Hery Suhayat Minardi Suhayat Minardi Suryanto, Wiwit Tommy Kharizma Husein Tri Budi Setiawan Trisya Septiana Upik, Upik Wahyudi Wahyudi Wibowo, Rahmat Catur Widiatmoko, Donny Yesi Yandriani Yogi, Ida Bagus Suananda