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Program Studi Teknik Geologi Lt. 2 Gedung Fakultas Matematika dan Ilmu Pengetahuan Alam Kampus Hijau Bumi Tridharma Universitas Halu Oleo, Anduonohu, Kendari, 93232
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OPHIOLITE : Jurnal Geologi Terapan
Published by Universitas Halu Oleo
ISSN : -     EISSN : 27154440     DOI : https://doi.org/10.56099/ophi.
Core Subject : Science, Engineering,
Earth & Planetary Sciences Engineering
OPHIOLITE: Jurnal Geologi Terapan adalah terbitan berkala ilmiah yang dikelola dan diterbitkan oleh Program Studi Teknik Geologi Universitas Halu Oleo. Terbitan ini memuat artikel pada topik ilmu geologi maupun geologi terapan. Riset ilmu geologi mencakup riset sains kebumian di bidang geologi, geofisika, dan geokimia. Riset geologi terapan mencakup bidang geologi eksplorasi, geologi rekayasa, mitigasi bencana geologi, hidrogeologi, dan geologi lingkungan.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Teknik Geologi dan Geologi Teknik
Articles 5 Documents
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Search results for , issue "Vol 6 No 1 (2024): APRIL 2024" : 5 Documents clear
Penerapan Klasifikasi Massa Batuan dan Metode Kesetimbangan Batas Terhadap Kestabilan Lereng Tambang PT. Ifisdeco, Sulawesi Tenggara Oksteming, Jenly; Awaliah, Wd Rizky; Anshari, Erwin
OPHIOLITE: Jurnal Geologi Terapan Vol 6 No 1 (2024): APRIL 2024
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/ophi.v6i1.p36-41

Abstract

PT Ifishdeco often experiences problems in its mining activities, which originate from geotechnical issues, such as landslide events. This study aims to recommend the value of slope parameters to remain stable and safe by considering the influence of geological structures and types of landslides in the South Block Jey Pit of PT Ifishdeco Tbk. Slope stability analysis using the Bishop method with Mohr-Coloumb criteria based on direct shear strength test results and rock mass classification. The results of the study show that the safety factor value of the actual slope geometry on slope A and slope B obtained safety factor values of 0.79 and 0.83 with unstable conditions caused by the influence of the presence of discontinuity planes that reduce the strength of the slope constituent. Based on the kinematic analysis results, the landslide types found on slopes A and B are classified as wedge failures. Optimization of slope geometry is required as a recommendation for slope geometry design. Optimization of the slope height and bench slope is necessary.
Morfotektonik pada Gunung Parang Melalui Pendekatan Geomorfologi Tektonik Digital, Daerah Karangsambung Ghufrani, Poppy; Soesilo, Joko
OPHIOLITE: Jurnal Geologi Terapan Vol 6 No 1 (2024): APRIL 2024
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/ophi.v6i1.p19-28

Abstract

Mount Parang is a sill intrusion formed as partial melting due to tectonic activity namely subduction in Miocene which then broke through the Karangsambung formation and revealed to the surface as Mount Parang. Apart from the Mount Parang intrusion, the result of tectonic activity at that time is hills morphology with landforms in the form of anticline and syncline fold structures that stretch from east to west of the Karangsambung area. The geomorphological approach aims to determine the level of tectonic activity based on morphotectonic analysis around the Mount Parang intrusion. Morphotectonic analysis is conducted through a quantitative approach, by measuring and calculating geomorphic index variables using mathematical formulas. The index variables analysed include hypsometric integral (Hi), basin watershed asymmetry (AF), stream gradient-length index (SL), ratio of valley floor width to valley height (Vf), and mountain front sinuosity (Smf). Based on calculation Hi has a value of 1.0 with SL covering three classes. The AF index has a value of >50 with Vf values is between 0.26 and 0.87 and Smf values between 1.3 and 2.7. Based on these values, it indicates that the area around the Mount Parang intrusion has high tectonic activity.
Potensi Likuifaksi Di Kabupaten Konawe Utara Sulawesi Tenggara Berdasarkan Metode Susceptibility Rating Factors (SRF) Cendra Jaya, Rio Irhan Mais; Deniyatno
OPHIOLITE: Jurnal Geologi Terapan Vol 6 No 1 (2024): APRIL 2024
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/ophi.v6i1.p11-18

Abstract

The liquefaction disaster that occurred in Palu, Central Sulawesi, was caused by a 7.5 SR. The movement of the Palu-Koro Fault triggered the earthquake which was then followed by liquefaction. North Konawe Regency, Southeast Sulawesi, is crossed by the Lawanopo Fault which is a continuation of the Palu-Koro Fault, so that North Konawe Regency has the potential for liquefaction. BMKG seismic data records that >90% of earthquake events in North Konawe are triggered by movements of the Lawanopo Fault. This research focuses on the potential for liquefaction that can be triggered by earthquake activity in North Konawe Regency. Susceptibility Rating Factor (SRF) method is used by calculating the liquefaction susceptibility index (ISL) based on historical parameters, geological data, soil texture and composition, and hydrogeological data. North Konawe Regency has 5% areas with high liquefaction potential, 2% medium potential, 6% low potential, and 87% very low potential. Areas with high potential (5%) and medium potential (2%) are densely populated areas because they are located in the center of the capital city of North Konawe Regency. This area is a basin formed due to the activity of the Lawanopo Fault.
Analisis Kerentanan Banjir Menggunakan Metode Normalised Morphometric Flood Index (NMFI) Studi Khusus: SubDAS Air Manna, Bengkulu Selatan Islam, Muhammad Izzul; Setiawan, Budhi
OPHIOLITE: Jurnal Geologi Terapan Vol 6 No 1 (2024): APRIL 2024
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/ophi.v6i1.p1-10

Abstract

Air Manna River is the main river that accommodates water flow from small rivers in the Air Manna sub-watershed. This river has a reasonably large water discharge. One way to determine a watershed's flood disaster potential is by using the morphometric aspect approach to the watershed. After analysing the morphometric parameters, it was found that some areas in the Air Manna sub-watershed have high flood potential. These areas are areas with high drainage density values, high main channel slope in the river flow, low length of overland flow values, high ruggedness number, and low bifurcation ratio values. Furthermore, the results of the morphometric parameter analysis of the research area will be normalized using the Normalized Morphometric Flood Index (NMFI) method. NMFI simplifies the values of the morphometric parameter analysis results into the range 0 - 1, which aims to reduce the subjectivity of the analysis results so that it will increase the accuracy of the analysis data. Based on the results of processing with the NMFI method, three levels of flood hazard were obtained, i.e. low, medium, and high, which are depicted by green, yellow, and red colours on the map. Areas with low hazard levels amounted to 5.98% or 2009.75 km2, medium hazard levels amounted to 80.09% or 26916.64 km2, and areas with high hazard levels amounted to 13.92% or 4678.23 km2.
Pengaruh Perubahan Tutupan Lahan terhadap Pola Banjir di Ibu Kota Provinsi Lampung: Studi Menggunakan SIG dan Pendekatan Temporal Matondang, Pebriadi Halomoan; Rizkiani, Deli; Akbari, Irgi; Haerudin, Nandi; Mulyasari, Rahmi
OPHIOLITE: Jurnal Geologi Terapan Vol 6 No 1 (2024): APRIL 2024
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/ophi.v6i1.p29-35

Abstract

Bandar Lampung often faces major challenges related to flooding. In recent years, flooding in the city has become a serious problem that requires special attention and handling. Infrastructure development and continuous population growth affect changes in the city's environmental setting. From the continuous flooding in Bandar Lampung city, it is necessary to analyse flood patterns with a spatial and temporal approach. The utilization of Geographic Information System (GIS) method is one of the effective ways in making maps with various data used such as rainfall, land cover, watershed, slope, and information on flood incidents over a 10-year period, from 2013 to 2023. The watershed, land cover and slope data also provide an overview of the dynamics of water flow and its influence on flood-prone areas. From the data, it was found that the distribution of Bandar Lampung urban forest area decreased by 63859.61 ha from 83778.11 ha to 19918.5 ha or about 23.8% of the Bandar Lampung City area. In addition, there was an increase in residential and industrial areas of 36750.95 ha from 2013 of 27143.83 ha to around 63,894.78 ha or approximately 76.2% of the total area of Bandar Lampung City. This research contributes to the importance of understanding the dynamics of flooding in Bandar Lampung City and contributes to the understanding of the dynamics of flooding in Bandar Lampung City.

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