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All Journal International Journal of Public Health Science (IJPHS) Journal of Degraded and Mining Lands Management Science and Technology Indonesia Journal of Geoscience, Engineering, Environment, and Technology Jurnal Penelitian Sains Buletin Sumber Daya Geologi IJEMS (Indonesian Journal of Environmental Management and Sustainability) Jurnal Pengabdian kepada Masyarakat Nusantara Jurnal Geosains dan Remote Sensing (JGRS) Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) JURNAL ILMIAH GLOBAL EDUCATION Prosiding Seminar Nasional Teknik Lingkungan Kebumian SATUBUMI
Mochammad Malik Ibrahim
Program Studi Teknik Geologi, Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Combining Analytical Hierarchy Process and Geographic Information Systems for Selection of Landfill Site Location: A Case Study of Ogan Ilir Regency, Indonesia Dwi Vina Febrim; Idarwati; Mochammad Malik Ibrahim; Dede Nurohim
Indonesian Journal of Environmental Management and Sustainability Vol. 10 No. 3 (2026): September
Publisher : Magister Program of Material Science, Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2026.10.3.204-213

Abstract

Landfill site selection in Ogan Ilir Regency presents significant challenges due to escalating waste generation and the risks associated with improper landfill siting. This research identifies and maps environmentally suitable locations for landfill development in Ogan Ilir Regency, South Sumatra, Indonesia, through an integrated methodology that combines the Analytic Hierarchy Process (AHP), Geographic Information Systems (GIS), and remote sensing. Ten sub-criteria were established and categorized as physical, environmental, or socioeconomic, with each assigned a weight via pairwise comparison matrices. The resulting weighted spatial layers were analyzed using a weighted linear combination technique to produce comprehensive suitability models. The analysis classified the study area into three categories: less suitable (1.81%, 4,307.73 ha), moderately suitable (74.46%, 177,404.25 ha), and highly suitable (23.73%, 56,533.78 ha) for landfill development. The framework was validated using satellite imagery and adapted to local conditions, delivering a practical decision-support tool for regional planners and decision makers to promote effective and environmentally sustainable waste management strategies.
Kajian Geomorfologi Daerah Danau Ranau dan Sekitarnya Sesaria Rahmadini; Edy Sutriyono; Mochammad Malik Ibrahim
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.v7i1.1682

Abstract

The Ranau Lake area and its surroundings are located along the Bukit Barisan Range, which constitutes an active volcanotectonic zone influenced by the Sumatran Fault System. This study was conducted to identify geomorphic units and to understand the geomorphological processes that contribute to the formation of the landscape in the study area. The analysis was carried out using morphographic, morphometric, and morphogenetic approaches by utilizing Digital Elevation Model (DEM) data, topographic maps, and field observations. The results indicate that the geomorphology of the Ranau Lake area is composed of volcanotectonic, denudational, and volcanic landforms, which have developed through the interaction of tectonic activity, erosional processes, and Quaternary volcanism. In general, the regional morphology is characterized by steep relief, variable slope gradients, and radial to dendritic drainage patterns influenced by geological structures and lithological conditions. This geomorphological study is expected to provide insights into the landscape evolution of the Ranau Lake area and serve as a basis for regional geological analysis and land-use planning.
Temperature Estimation of Geothermal Systems and Subsurface Model Based on Geochemical of Lake Ranau Mochammad Malik Ibrahim; Agung Harijoko; Wiwit Suryanto
Science and Technology Indonesia Vol. 11 No. 3 (2026): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2026.11.3.773-783

Abstract

The geothermal potential of the Lake Ranau area comes from the remnants of magmatic activity from Mount Seminung. Geothermal manifestations in this area are in the form of hot springs that are thought to emerge through geological structures. This research aims to determine the approximate temperature of the geothermal system and subsurface model based on the analysis of chemical geothermometer method. The chemical geothermometer method can be used to indirectly predict the temperature of the subsurface geothermal system. Geothermal fluid manifestations in Kota Batu Village were chemically sampled by collecting three samples (LP 1, LP 2, and LP 3) and in Lombok Village by collecting three samples (LP 4, LP 5, and LP 6). Chemical geothermometers used in the research are silica, Na/K, K/Mg and Na-K-Ca geothermometers. The results of chemical geothermometer calculations on 6 samples of geothermal fluid manifestation locations, the estimated temperature of the subsurface geothermal system in the research area ranges from 177.0 - 285.6 0C and is included in the geothermal system with medium to high enthalpy. The subsurface model based on the calculation results of various chemical geothermometers about geothermal system components such as cap rock, reservoir rock, heat source, geological structure, thermal fluid and surface manifestations.
Co-Authors A. F. H. Surbakti A. G. Marbun D Abiyyu, Rayhan Khairunnan Agung Harijoko Alfalah, Jasmin Arya Almentirado, M. D. Anita Camelia Bochori Bochori Cahyaningsih, B. Costa, Anthony D. Andarini D. I. Arifianto Dede Nurohim Desheila Andarini Dwi Vina Febrim Edy Sutriyono Edy Sutriyono Harnani Harnani Idarwati Imam Baru Raharjo Imam Baru Raharjo Jasmin Arya Alfalah M. Puspita Mukiat . Noor Azizah, Sundus Ghaida Pri Utami Pri Utami Purba, D. A. Puspita, M. Rahmadini, Sesaria S. N. Jati Satya, Rastra Yandra Sesaria Rahmadini Stevanus Nalendra Jati Wiwit Suryanto Zahra, Salsabila Az Zainal, Pradana Arviano