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Aang Panji Permana
Geology Engineering Study Program, Universitas Negeri Gorontalo, Indonesia
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science

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Analisis Kerentanan Tsunami Desa Talumolo Berbasis Sistem Informasi Geografis dan Parameter Multispektral untuk Mitigasi Bencana Dicky Rahmansyah S Tone; Aang Panji Permana
Journal of Applied Geoscience and Engineering Vol 4, No 2 : Desember 2025
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jage.v4i2.38238

Abstract

The coastal area of Gorontalo City, particularly Talumolo Village, exhibits a high level of vulnerability to tsunamis due to its location within the active tectonic setting of the Sangihe–Halmahera Arc, which is directly adjacent to Tomini Bay. This study aims to analyze the level of tsunami vulnerability in Talumolo Village and its surrounding areas using a Geographic Information System (GIS) based on five multispectral parameters: elevation, slope, distance from rivers, distance from the coastline, and land cover. The data were obtained from the Geospatial Information Agency (BIG) in 2019 and processed using ArcGIS 10.8 through the Weighted Overlay Analysis method. Each parameter was classified into five vulnerability classes using a scoring system ranging from 1 to 9, and subsequently integrated using proportional weighting: elevation (30%), slope (25%), distance from the coastline (20%), distance from rivers (15%), and land cover (10%). The results reveal five classes of tsunami vulnerability: very high vulnerability covering 215.4 ha (23.7%), high vulnerability covering 198.2 ha (21.8%), moderate vulnerability covering 370.0 ha (40.7%), low vulnerability covering 67.4 ha (7.4%), and very low vulnerability covering 58.9 ha (6.4%). Areas with very high vulnerability are concentrated along the coastal zones of Pohe, South Leato, and Bugis, characterized by elevations below 20 meters and located within 500 meters of the shoreline. Elevation and slope are identified as the primary controlling factors, while densely populated land cover acts as an amplifying factor of potential impacts. The resulting vulnerability map represents the first spatial instrument for this area and can serve as a basis for disaster mitigation planning, hazard zoning, evacuation route development, and coastal spatial planning in Gorontalo City.
Pengaruh Lingkungan Pengendapan terhadap Sebaran dan Kualitas Lapisan Batubara di Desa Kalasari, Papua Barat Daya Yosiyan Daniel Sinaga; Aang Panji Permana; Muh Kasim
Journal of Applied Geoscience and Engineering Vol 4, No 2 : Desember 2025
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jage.v4i2.37129

Abstract

This study was conducted in Kalasari Village, Salawati District, Sorong Regency, Southwest Papua, within the Contract of Work area of PT Megapura Prima Industri. The research integrated field geological observations, detailed lithological and outcrop descriptions, drill core logging and correlation, and laboratory proximate analysis to characterize coal occurrence and quality. Stratigraphic analysis indicates that the study area is composed of two principal lithological units: the Sele Claystone Unit, deposited in backswamp to swamp environments, and the Sele Sandstone Unit, representing floodplain facies. Borehole correlation reveals coal seam thicknesses ranging from 0.3 to 1.82 m, with a general westward thickening trend, reflecting microtopographic variation and peat stability during deposition. The roof and floor of the coal seams are dominantly claystone or clayey sandstone, indicating overbank flood sedimentation that facilitated peat preservation. Proximate analysis shows that the coal is low rank, characterized by calorific values of 3220–3619 kcal/kg (adb), low ash content (1.7–3.8%), very low sulfur content (0.2%), and high total moisture (32–37%). These characteristics are typical of freshwater swamp–backswamp facies within an upper delta plain depositional environment with limited clastic input. The relatively thin overburden further constrained coalification, resulting in low calorific values. Overall, the results demonstrate that coal distribution, seam thickness, and coal quality in the study area are strongly controlled by upper delta plain depositional dynamics, particularly swamp and backswamp facies that governed peat accumulation and preservation.
Kajian Geologi Teknik dan Potensi Longsor pada Segmen IG1 dan IG2 Akses Tambang di Kabupaten Pohuwato, Gorontalo Immanuel Ginting; Aang Panji Permana; Ahmad Zainuri
Journal of Applied Geoscience and Engineering Vol 4, No 2 : Desember 2025
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jage.v4i2.37128

Abstract

This study examines the geological conditions and slope stability of segments IG1 and IG2 in the Magazine access area of the Pani Gold Project, Pohuwato Regency. The research methods include geological mapping, scanline analysis, kinematic evaluation using stereonet, and Rock Mass Rating (RMR) and Slope Mass Rating (SMR) assessments. Segment IG1 consists of volcanic breccia with an RMR value of 57 (Class III, Fair Rock) and an SMR value of 45–50 (Poor), indicating wedge failure potential. Segment IG2 is dominated by dacite with an RMR of 60 (Class III, Fair Rock) and an SMR of 55–60 (Fair–Good), showing a tendency toward toppling failure. The results suggest that IG2 is relatively more stable than IG1, although localized failures may occur. Technical recommendations include slope reinforcement with rock bolts, shotcrete, and drainage systems to minimize slope failure risks.
Co-Authors Ahmad Zainuri Dicky Rahmansyah S Tone Immanuel Ginting Muh Kasim Yosiyan Daniel Sinaga