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PENGENALAN ILMU KEBUMIAN DAN IMPLIKASINYA TERHADAP KEBENCANAAN DAN SUMBERDAYA ALAM Novi Triany; Yarra Sutadiwiria; Imam Setiaji Ronoatmojo; Bani Nugroho; Benyamin Benyamin; Muhammad Burhannudinnur; Himmes Fitra Yuda; Muhammad Yusril Ihza Mahendra Triany
Jurnal AKAL : Abdimas dan Kearifan Lokal Vol. 3 No. 2 (2022): Jurnal AKAL : Abdimas dan Kearifan Lokal
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (517.648 KB) | DOI: 10.25105/akal.v3i2.13866

Abstract

Resiko geologi adalah resiko yang terjadi akibat terjadinya proses geologi, atau disebut bencana geologi, seperti gempa bumi, longsoran, banjir, dan erupsi gunung api. Bencana ini dapat melanda permukaan bumi dan mengakibatkan efek kerugian yang tidak kecil, mulai dari lingkungan, aktivitas masyarakat di daerah tersebut, maupun dampak terhadap masyarakat itu sendiri. Saat ini Indonesia sedang beruntun dilanda bencana geologi, seperti tanah longsor, banjir, gempa bumi, erupsi gunung api, dan tsunami. Data statistik menunjukkan adanya peningkatan terjadinya bencana tersebut. Oleh karena itu, diperlukan suatu pemahaman usaha mitigasi bencana, baik sebelum, sedang terjadi atau sesudah terjadinya bencana, termasuk pengetahuan mengenai proses yang menyebabkan terjadinya bencana geologi tersebut. Fokus kegiatan PkM adalah memberikan sosialisasi mengenai kondisi geologi dan potensi bencana geologi yang dapat terjadi di wilayah Ciracas-Jagakarsa-Pamulang, serta usaha mitigasi penanggulangan bencana yang dibutuhkan. Sosialisasi diberikan kepada siswa dan guru SMP Al-Azhar 19 Cibubur, Jakarta Timur. Penyampaian kegiatan sosialisasi dilakukan secara virtual menggunakan aplikasi zoom meeting dan ditindaklanjuti dengan melakukan verifikasi ke lapangan untuk mengidentifikasi potensi bencana di daerah ini. Pelaksanaan program ini telah meningkatkan pengetahuan peserta PkM dalam mengetahui jenis bencana dan mitigasi yang tepat untuk setiap bencana geologi yang berpotensi terjadi di daerah penyelenggaraan PkM.
PERENCANAAN LOKASI PONDASI BENDUNGAN PADA BENDUNGAN CIPANAS, KABUPATEN SUMEDANG, PROVINSI JAWA BARAT Mira Meirawaty; Imam Setiaji Ronoatmojo; Harry Pramudito; Kefi Rahmadio
Journal of Geoscience Engineering & Energy (JOGEE) VOLUME 2, NOMOR 2, AGUSTUS 2021
Publisher : Universitas trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3224.762 KB) | DOI: 10.25105/jogee.v2i2.10275

Abstract

Penelitian dilakukan di Bendungan Cipanas, Kabupaten Sumedang, Provinsi Jawa Barat. Topik utama yang dibahas dalam makalah ini adalah perencanaan desain untuk pembangunan DAM, yang berkaitan dengan beberapa aspek stratigrafi, litologi, struktur geologi, dan rekayasa (sifat fisik dan mekanik batuan). Aspek stratigrafi kawasan bendungan ini meliputi beberapa formasi seperti Formasi Subang, Formasi Kaliwangu, Formasi Citalang, Tuf, dan Aluvial. Aspek Litologi Bendungan Cipanas terdiri dari beberapa litologi, dari tua ke muda adalah Satuan Batulempung Serpih (Tmbl) berumur Miosen Akhir, Satuan Batupasir Molluscan (Tpbpm) Pliosen Awal, Satuan Konglomerat (Tpk), Satuan Batupasir Kasar (Tpbk) . ), Satuan Batulempung Abu-abu Tua-Biru-Hijau (Tpbl) dimana ketiganya di atas berasal dari Pliosen Akhir – Pleistosen Awal, Satuan Tuf (Kt) dan Satuan Aluvium (Ka) adalah Holosen. Analisis stereonet yang berasal dari kelurusan dan pengamatan lapangan menunjukkan bahwa beberapa struktur geologi yang terbentuk di kawasan Bendungan As, yaitu Antiklin Selatan, Antiklin Timur, dan Sinklin Timur, serta Sesar Selatan dan Sesar Naik Utara. Pengambilan sampel litologi seperti batupasir, batulempung, dan konglomerat telah dilakukan untuk menentukan luasan yang sesuai untuk pembangunan pondasi pada Bendungan As Cipanas.
ANALISIS KAWASAN RAWAN GEMPA BUMI UNTUK MITIGASI BENCANA DI PALUNG SUMATRA DAN SEKITARNYA Rosiyanti Sinaga; Imam Setiaji Ronoatmojo
Journal of Geoscience Engineering & Energy (JOGEE) VOLUME 3, NOMOR 1, FEBRUARI 2022
Publisher : Universitas trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (834.431 KB) | DOI: 10.25105/jogee.v3i1.12998

Abstract

Indonesia is situated at the junction of three active plates: Eurasia, Circum Pacific, and Indo-Australia.. Sumatran tectonics is controlled by the subduction of two plates, namely the Indo-Australian plate and the southeastern Eurasian plate. The research area is along the Sumatra Trench and the data used are from the United States Geological Survey in  the last 50 years, the depth is 0-60 km, and the methodology used is the least squares method. Purpose of this study, to predict the occurrence of earthquakes with the aim of minimizing the impact of damage that occurs in earthquakes. The Locked Area has a high return period value, the influencing factor is the existence of a seismic gap, where the stress applied to this area will be isolated due to seamount subduction, so that it can withstand earthquakes. but one day, when the rock can no longer withstand the stress, it will cause an earthquake with large strength.
ANALISIS TINGKAT AKTIVITAS SEISMIK DAN KERAPUHAN BATUAN DI DATARAN PAPUA DAN SEKITARNYA PADA KEDALAMAN 0-60 KM: ANALYSIS OF SEISMIC ACTIVITY AND ROCK FRIABILITY LEVEL IN THE PAPUA LAND AND SURROUNDINGS AT A DEPTH OF 0-60 KM Muhammad Irfan Fadilah; Imam Setiaji Ronoatmojo
Journal of Geoscience Engineering & Energy (JOGEE) VOLUME 3, NOMOR 1, FEBRUARI 2022
Publisher : Universitas trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1830.32 KB) | DOI: 10.25105/jogee.v3i1.13003

Abstract

There is a meeting point of the oceanic plate, namely the Pacific Plate which is subducting under Papua and moving to the southwest at a speed of 120 mm/year, and the Australian Plate which is moving towards the Eurasian Plate and moving north at a rate of 70 mm/year. This condition causes the areas of Papua and West Papua to be shaken by many earthquakes. This research was conducted to analyze the rock friability level, as well as seismic activity in the study area, in order to minimize the damage caused by the earthquake. The data used is earthquake data from the United States Geological Survey (USGS) from 1971-2021 or within a period of 50 years, with a depth of 0-60 Km, with an earthquake magnitude of M 2 and moment tensor data, using the least squares method. In the research region, 372 earthquake spots have been discovered in the last 50 years.. The highest ai and bi values are at magnitude 7.95 with ai values of 0.028937 and bi values of 0.1661137. At magnitude 4.9, the lowest ai and bi values are ai values 0.028927 and bi values 0.1660554. The number of earthquake frequencies in the area influences the value of ai (seismic activity), and the magnitude and seismic activity in the area influence the value of bi (rock friability level).Keywords : Papua, Seismic Activity, Rock Friability
COMMUNITY AWARENESS DURING THE PANDEMIC OF COVID-19: PLASTIC WASTE AS AN ALTERNATIVE ENERGY Andry Prima; Samsol; Abdul Hamid; Imam Setiaji Ronoatmojo; Heru P Sanusi
Jurnal Abdi Masyarakat Indonesia (JAMIN) Vol 4 No 1 (2022): JURNAL ABDI MASYARAKAT INDONESIA (JAMIN)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (965.334 KB) | DOI: 10.25105/jamin.v4i1.9767

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The increasingly hoarding volume of plastic waste has attracted numerous researchers to conduct studies in finding the blessing in disguise behind such unpleasant conditions. On the other hand, plastic is one of the end product derived from the refining process of crude or known as petroleum. Thus, the silver lining then can explain the connection between plastic waste and the possibility to use it as alternative energy. By utilizing plastic waste as alternative energy that can substitute the use of conventional fuel, the stage in which people will have a more economical source of energy. As such conditions are established, the economy at the micro or household level will significantly improve. This particular community service reached out to residents of relatively small neighboring houses in Kebun Jeruk Area, Jakarta, Indonesia. During the service, the activity was aimed to provide counseling and training for the community to empower the community on how to make use of plastic waste and process it into an alternative fuel. In the end, such alternative energy should help reduce dependency on the conventional fuel consumed regularly by the household.
KAPASITAS SEKATAN SESAR EPISODE TEKTONIK F1 PADA STRUKTUR “SUPRAN”, CEKUNGAN SUMATERA TENGAH Muhammad Naufa Syafrun; Imam Setiaji Ronoatmojo; Firman Herdiansyah
Jurnal Eksakta Kebumian Vol. 1 No. 2 (2020): Vol 1, No 2 (2020): JURNAL EKSAKTA KEBUMIAN (JEK)
Publisher : Fakultas Teknologi Kebumian dan Energi, Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5867.52 KB) | DOI: 10.25105/jek.v1i2.10638

Abstract

Cekungan Sumatera Tengah merupakan cekungan yang mengalami rangkaian deformasi yang mempengaruhi lapisan batuan sehingga memiliki struktur bawah permukaan yang kompleks, struktur sesar memiliki peran sebagai pengontrol distribusi dan akunulasi hidrokarbon. Struktur “SUPRAN” dikontrol oleh struktur sesar normal dan sesar mendatar yang dapat bersifat sebagai perangkap hidrokarbon ketika memiliki sealing capacity tinggi. Penelitian ini menganalisis karakteristik sesar normal menggunakan metoda shale gouge ratio (SGR), data yang digubakan adalah data seismik 2D dan data sumur. Analisis dilakukan membuat Allan Map, Throw Map, dan SGR Map pada bidang sesar. Hasil analisis menunjukkan dominasi kesehadapan sandstone juxtapose terhadap sandstone dengan nilai SGR dominan berkisar pada 10%-25%. Hasil penelitian sesar normal pada struktur “SUPRAN” bersifat leaking. Kata-kata kunci: Analisis Sekatan Sesar, Shale Gouge Ratio, Juxtaposition, Sealing Capacity, Cekungan Sumatera Tengah
Spatial Simulation Model of Bauxite Grades Using R Data Analysis: Its Implication for Exploration Activity Rosmalia Dita Nugraheni; Dedi Sunjaya; Bronto Sutopo; Mohammad Apriniyadi; Cahyaningratri Prima Riyandhani; Imam Setiaji Ronoatmojo
Indonesian Journal on Geoscience Vol 9, No 3 (2022)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.9.3.

Abstract

DOI:10.17014/ijog.9.3.In exploration, the investigation of prospective area encounters several barriers of land ownership, budget limitation and exhausting permit procedures. To speed up the exploration activities of bauxite deposits, bauxite characteristics and grades of the gap areas should be simulated based on the available set of test pit data. This study aimed to address the limitations and optimize the exploration boundaries using R. R data analysis weaves the framework of kriging geostatistics that required information from the adjacent data. This study utilizes the geochemical data of Al2O3, Fe2O3, SiO2 and TiO2 from 296 test pit sampling sites to extrapolate the blank data. The geochemical data used for R analysis were taken from bauxite horizon, while the other mineralogical properties were taken entirely from the exposed bedrock and test pit data. To verify the result of R analysis, recent data of the simulated area were used as a comparison. The R result shows the prediction value is slightly below the actual value of Al2O3. The kriging simulation of Al2O3 was correlated with test pit and mineralogical characters of samples and reveals that the predicted value of simulation closely represents the true value of Al2O3 grades. Extrapolation results of Fe2O3 and RSiO2 with regards to Al2O3 grades are suggesting that higher grade of bauxite underwent desilication and deferruginization as evidenced by a high value of Index of Lateritization. It can be inferred that this attempt points out the advantages of a quick and reliable projection of bauxite laterite deposits from the limited parameters.
BIBLIOMETRIC ANALYSIS ON NUMERICAL LITHOFACIES IDENTIFICATION FOR RESERVOIR CHARACTERIZATION IN THE PERIOD OF 1980 -2021 Imam Setiaji Ronoatmojo; Muhamad Apriniyadi; Rosmalia Dita Nugraheni; Cahyaningratri Prima Riyandhani; Cahaya Rosyidan Rosyidan; Yarra Sutadiwiria
PETRO:Jurnal Ilmiah Teknik Perminyakan Vol. 11 No. 4 (2022): DESEMBER
Publisher : Jurusan Teknik Perminyakan Fakultas Teknologi Kebumian dan Energi Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/petro.v11i4.14424

Abstract

The term "electrofacies" was introduced in 1980 by Serra and Abbott, it had been developed promptly since 2009. The development was triggered predominantly by wireline logging technology and artificial intelligence technology. The electrofacies categorization was intended to facilitate the study of reservoir characterization. However, it is difficult to formulate deterministically, due to the uniqueness of the depositional environment and geological processes that involve many physical properties. At least, there are 369 articles which were obtained from Scopus sources in the period of 1980 - 2021. In this bibliometric analysis, we regrouped the articles into four groups, i.e. “pattern recognition” “facies analysis”, “objectives” and “quality”. This grouping was attained on the methods of co-occurences, co-authorship, citation analysis and bibliographic coupling using VOSviewer software. The distance and coupling between themes will determine the level of quality and quantity of discussion between them. The quality of the objective resides in the certainty value of the lithology controlled by transportation or diagenetic events. For example, sand and shale which are siliciclastic lithology will have a higher degree of certainty than carbonate rocks. Therefore, the wide gap occurred during the application of artificial intelligence, especially for complex facies and uncertain geological conditions. The application of artificial intelligence is not solely functional without involving geological analysis. The implication is some researchs are still needed from this point of view, so the electrofacies role cannot be independent without developing models of the diagenetic process.
ANALISIS TAPAK BENDUNGAN MENGGUNAKAN METODE GROUTING PADA BENDUNGAN JLANTAH KABUPATEN KARANGANYAR PROVINSI JAWA TENGAH: ANALYSIS OF DAM SITE USING GROUTING METHOD IN JLANTAH DAM, KARANGANYAR REGENCY, CENTRAL JAVA PROVINCE Arkhandiaz Shalimar; Imam Setiaji Ronoatmojo
Journal of Geoscience Engineering & Energy (JOGEE) VOLUME 4, NOMOR 1, FEBRUARI 2023
Publisher : Universitas trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jogee.v4i1.14409

Abstract

Perancangan bendungan harus memperhatikan kestabilan tubuh bendungan. Stabilitas bendungan sebagian bergantung pada litologi batuan dan rembesan di dalamnya. Tujuan dari penelitian ini adalah untuk mengkaji geologi teknik dan kondisi geologi, agar dapat mengetahui kemantapan atau kesiapan pondasi tapak bendungan. Perbukitan bergelombang structural dan satuan dataran fluvial merupakan dua satuan geomorfologi yang membentuk daerah penelitian. Berdasarkan litostratigrafi tidak resmi, stratigrafi daerah peneletian dibagi menjadi 5 satuan, yaitu satuan endapan teras, satuan tuff, satuan tuff lapilli, satuan breksi, dan satuan aglomerat. Struktur geologi yang terdapat pada daerah penelitian ada strike dip fault. Geologi teknik dipisahkan menjadi dua unit di daerah penelitian: Kelas CW dan Kelas HW. berdasarkan klasifikasi International Society for Rock Mechanism dan studi korelasi satuan batuan (ISRM, 1978), pada lokasi tapak bendungan batas pengupasan yaitu pada lapisan dengan kedalaman 0-35 meter, dengan tingkat pelapukan sempurna (CW). Berdasarkan uji lapangan didapati nilaiSPT 30-50, jenis tanah yang ada pada pondasi bendungan termasuk dalam konsistensi yang padat. Dari uji permeabilitas dilapangan maka pondasibendungan diperlukan perbaikan dengan injeksi semen atau grouting pada kedalaman 0-10 meter.
ANALISIS GEOKIMIA HIDROKARBON SUMUR “FLP” CEKUNGAN JAWA TIMUR UTARA: GEOCHEMICAL ANALYSIS OF HYDROCARBON WELL "FLP" BASIN NORTH EAST JAVA Filipus Armando Armando Ginting; Yarra Sutadiwiria; Cahyaningratri Prima Riyandhani; Muhammad Burhannudinnur; Imam Setiaji Ronoatmojo; Novi Triany
Journal of Geoscience Engineering & Energy (JOGEE) VOLUME 4, NOMOR 1, FEBRUARI 2023
Publisher : Universitas trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jogee.v4i1.14415

Abstract

Daerah riset terdapat pada Blok Madura, Cekungan Jawa Timur Utara berupa dua sumur FLP-1 dan FLP-2. Analisa dilakukan agar mengetahui karakteristik batuan induk, material organic, biomarker, dan potensi batauan induk(source rock). FLP-1 diketahui terdapat Formasi Tuban dan Formasi Tawun, pada sumur FLP-2 diketahui Formasi Kujung dan Formasi Tuban.indikasi batuan induk potesial (tipe kerogen II) potensi mengenerasikan hidrokarbon jenis utama berupa gas, asal material tumbuhan tingkat tinggi dan lingkungan pengendapan organik fluvio-deltaic. Sumur FLP-2 Formasi Kujung Indikasi batuan induk efektif. (tipe kerogen II/III) potensi menggenerasikan hidrokarbon jenis minyak dan gas, asal material alga dan tumbuhan tingkat tinggi dan fasies organik marine-deltaic.