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Analisis Stabilitas Lereng Menggunakan Metode RMR dan SMR di Daerah Malanu, Distrik Sorong Utara, Kota Sorong, Provinsi Papua Barat Daya Mayzarah, Erikha Maurizka; Padendenan, Hardus; Wiratama, Rana; Tandirerung, Restu
Jurnal Geologi dan Sumberdaya Mineral Vol. 26 No. 1 (2025): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v26i1.805

Abstract

Kondisi lereng pada kawasan tambang batuan di Daerah Malanu, Distrik Sorong Utara, Kota Sorong sangat menarik, karena terdapat rekahan-rekahan yang kemungkinan menyebabkan lereng berada dalam kondisi tidak stabil dan berpotensi menimbulkan bencana. Tujuan dari penelitian ini adalah untuk menganalisis kualitas massa batuan, tingkat kestabilan lereng, dan upaya perkuatan lereng, sehingga dapat memberikan informasi kepada instansi terkait dan masyarakat mengenai kondisi lereng tersebut. Metode yang digunakan adalah scanline sampling, analisis RMR, analisis SMR, dan analisis kinematik. Dari hasil analisis, didapatkan bahwa lereng 1 memiliki nilai RMR 65 (baik), tipe runtuhan guling, dan nilai SMR 65 (stabil), lereng 2 memiliki nilai RMR 67 (baik), tipe runtuhan baji, dan nilai SMR 59,5 (stabil sebagian), lereng 3 memiliki nilai RMR 63 (baik), tipe runtuhan bidang, dan nilai SMR 57 (stabil sebagian), lereng 4 memiliki nilai RMR 63 (baik), tipe runtuhan bidang, dan nilai SMR 13 (sangat tidak stabil), serta lereng 5 memiliki nilai RMR 60 (sedang), tipe runtuhan guling, dan nilai SMR 60 (stabil). Rekomendasi perkuatan yang disarankan oleh Romana (1985) adalah perkuatan (IIb) untuk lereng 1, perkuatan (IIIa) untuk lereng 1,2, dan 5, serta perkuatan (Va) untuk lereng 4. Kata kunci: Massa Batuan, Kestabilan lereng, Scanline, RMR, SMR  
Analisis Kesesuaian Lahan Untuk Tempat Pembuangan Akhir (Tpa) Sampah Di Distri Ransiki Kabupaten Manokwari Selatan Wailola, Kermil; Alzair, Nur; Maurizka Mayzarah, Erikha
Jurnal Sains Geografi Vol 3 No 1 (2025): JURNAL SAINS GEOGRAFI
Publisher : Fakultas Ilmu Sosial dan Hukum, Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JSG.v3i1.04

Abstract

Ransiki District is one of the areas that has complex geological conditions and is very interesting to study. The Ransiki Fault is an active fault and is one of the main factors determining the suitability of land for a waste landfill based on geological aspects. The population growth in Ransiki District, South Manokwari Regency reached 16,245 people in 2020. However, until now there has been no landfill to accommodate waste from the community. Based on this, a land suitability study is needed to determine the location of a suitable waste disposal site. The data analysis method used in this study uses SNI No. 03-3241-1994. The results of this study, namely the regional stage which is overlaid from several parameters, produce 4 candidate locations for final waste disposal sites with candidate location 1 in Hamawi Village with an area of ​​136.51 Ha, candidate location 2 in Tobou Village with an area of ​​239.69 Ha, candidate location 3 in Sabri Village with an area of ​​413.12 Ha. Candidate location 4 is located in Kampung Sabri with an area of ​​101.45 Ha. The results of the preliminary stage from the weighting of each parameter where location 1 has a value of 495, location 2 has a value of 534, location 3 has a value of 543 and location 4 has a value of 483. From the results of the preliminary stage, the recommended location is location 3 which is located in Kampung Sabri, Ransiki District with the highest value of 543.
Analisis Tingkat Kerawana Banjir Daerah Distrik Masni Kabupaten Manokwari Provinsi Papua Barat Mayzarah, Erikha Maurizka; Rumayomi, Shopia Widya Selly; Wiratama, Rana
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 1 (2026): Februari
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i1.1105

Abstract

This study aims to analyze flood susceptibility in Masni District, Manokwari Regency, West Papua Province, using a geospatial approach based on Geographic Information Systems (GIS). The study area is characterized by complex geological and geomorphological conditions and has experienced significant flood events, notably in 2020 and 2024, which affected thousands of residents and infrastructure. The research employed overlay and scoring methods by integrating six main parameters: lithology, rainfall, slope, elevation, land use, and distance from rivers. Each parameter was assigned a weight and score according to its relative influence on flood occurrence. The data utilized in this study were derived from secondary sources, including DEMNAS, RBI maps, CHIRPS rainfall data, land use imagery, and field observations. The analysis results indicate that areas composed of alluvial deposits, gentle slopes, high rainfall intensity, low elevation, residential land cover, and proximity to rivers exhibit high flood susceptibility. The resulting flood susceptibility map classifies the study area into several zones: very high, high, moderate, and low susceptibility. This research is expected to serve as a reference for spatial planning and flood disaster mitigation strategies, as well as to provide valuable information for local communities and regional authorities.