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All Journal Jurnal Ilmu Lingkungan Journal of Applied Sciences, Management and Engineering Technology (JASMET) Jurnal Ilmiah Geologi pangea Journal of Infrastructure Policy and Management (JIPM)
Rachman, Muhammad Gazali
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Persebaran Pola Struktur Geologi Melalui Pendekatan Topografi dan Morfologi Daerah Tancep dan Sekitarnya, Gunungkidul, Yogyakarta Adha, Ikhwannur; Mardiati, Dani; Kurniawan, Oki; Utama, Peter Pratistha; Rachman, Muhammad Gazali; Krisnabudhi, Alfathony
Jurnal Ilmiah Geologi PANGEA Vol 11, No 1 (2024): Jurnal Ilmiah Geologi Pangea
Publisher : PROGRAM STUDI TEKNIK GEOLOGI FAKULTAS TEKNOLOGI MINERAL UPN VETERAN YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jigp.v11i1.12752

Abstract

Tancep merupakan desa yang berada di tenggara Bayat dan perbatasan antara Klaten dan Gunungkidul. Tancep dan sekitarnya memiliki struktur geologi yang cukup kompleks sebagaimana area yang berdekatan dengan Bayat. Penelitian terdahulu menyatakan bahwa struktur geologi yang berkembang pada lokasi ini cukup kompleks terutama sesar yang terbentuk. Namun, dari penelitian terdahulu tersebut kurang menggambarkan bagaimana persebaran pola struktur geologinya. Kajian pendahuluan ini dilakukan untuk menunjukkan persebaran pola struktur geologi yang berkembang di daerah Tancep dan sekitarnya melalui pendekatan topografi dan morfologi. Kajian ini dilakukan dengan harapan dapat memberikan gambaran awal untuk memetakan secara detil struktur geologi di lokasi tersebut. Penelitian dilakukan dengan pendekatan topografi dan morfologi serta interpretasi berdasarkan penelitian terdahulu. Analisis pada penelitian ini dilakukan dengan menggunakan analisis kelurusan topografi dan morfologi baik kelurusan punggungan bukit, kelurusan lembah, maupun kelurusan sungai. Kelurusan tersebut digambarkan dalam peta fault fracture density yang kemudian diinterpretasikan pola persebaran struktur geologi di daerah penelitian. Tancep dan sekitarnya secara umum memiliki tiga arah umum kelurusan topografi dan morfologi yaitu berarah barat daya-timur laut, barat laut-tenggara, dan utara-selatan. Pola kelurusan ini diinterpretasikan sebagai pola struktur geologi yang berkembang dan mengontrol topografi dan morfologi daerah penelitian. Pola struktur geologi berarah barat daya-timur laut merupakan pola utama yang berkembang di daerah penelitian. Sedangkan pola struktur geologi berarah barat laut-tenggara dan utara-selatan merupakan pola struktur geologi penyerta yang terbentuknya dapat terjadi karena beberapa kemungkinan.Kata Kunci: Tancep, Pola Struktur Geologi, Kelurusan.
Dry Landslide in Sarwodadi Village, Pejawaran Sub-Regency; An Untypical Landslide in Banjarnegara Regency, Central Java Province, Indonesia Lisan, Ahmad Rif'an Khoirul; Rachman, Muhammad Gazali; Sarastika, Tiara; Kurniawan, Oki
Jurnal Ilmu Lingkungan Vol 23, No 2 (2025): March 2025
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.23.2.359-370

Abstract

Banjarnegara is known as a regency highly susceptible to landslides, with over half of its territory classified as having a high to very high level of landslide hazard. Mass movements in Banjarnegara, particularly within the Merawu Sub-watershed, are predominantly categorized as slides. Rainfall stands out as the primary triggering factor for landslides in this region. This study aims to dissect the causes and mechanisms behind a unique landslide event that occurred in Sarwodadi Village, Pejawaran Sub-regency, Pejawaran Regency, Central Java Province, on July 6, 2022, around 10:30 PM. Unlike typical occurrences, this landslide was not propelled by precipitation, which is commonly the principal catalyst for landslides in Banjarnegara. Employing a three-stage methodology involving secondary data collection, field observation, and data analysis, we have identified two potential explanations for the landslide event: the loss of support from the stress barrier and mass sliding. Given that the area remains an active mining site with inherent dynamics, proactive measures are imperative to mitigate the risk of future landslides. This is essential for safeguarding the safety of local mining activities, which constitute the primary source of income for many households in Sarwodadi and its environment. A comprehensive mapping and assessment initiative targeting areas with geological characteristics akin to those in Sarwodadi should be undertaken across Banjarnegara. Such endeavors would not only diminish the occurrence of landslides but also enhance public awareness concerning atypical landslide occurrences.
Analisis Risiko Kebencanaan Indonesia untuk Mendukung Kebijakan Publik Rachman, Muhammad Gazali; Zelvany, Zshelda Tiara; Favali, Falkis Edo; Nugraha, Muhammad Reyfangga Aji Putra
Journal of Infrastructure Policy and Management (JIPM) Vol. 8 No. 1 (2025): Journal of Infrastructure Policy and Management (JIPM)
Publisher : PT Penjaminan Infrastruktur Indonesia (Persero)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35166/jipm.v8i1.99

Abstract

Indonesia is situated within an active tectonic zone, rendering it highly susceptible to earthquakes. Earthquake disasters not only result in physical damages and loss of life but also pose significant challenges in formulating adaptive and risk-based public policies. This study aims to analyze earthquake disaster risk in Indonesia and evaluate the extent to which public policy has addressed this potential hazard. The methodology employed is a literature review using a mixed-methods approach: qualitative analysis to examine geological and social aspects, and quantitative analysis through spatial assessments utilizing Geographic Information Systems (GIS). The analysis is grounded in a conceptual disaster risk framework encompassing three main components: hazard, exposure, and capacity. The findings reveal that the presence of active faults traversing densely populated areas, limited public awareness, and weak enforcement of technical regulations such as the Indonesian National Standard (Standar Nasional Indonesia/SNI) for earthquake-resistant buildings contribute to the high disaster risk. This study recommends the integration of disaster education into the school curriculum, the strengthening of technical regulations such as the earthquake-resistant SNI, and the incorporation of local wisdom in building practices as strategies to enhance community resilience to earthquake disasters.
Groundwater System Characteristics of Soe Area, East Nusa Tenggara, Indonesia: The Role of Rock Properties and Structural Geology Rachman, Muhammad Gazali; Nurwantari, Nanda Ajeng; Wibowo, Eko
Journal of Applied Sciences, Management and Engineering Technology Vol 6, No 2 (2025)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jasmet.2025.v6i2.8200

Abstract

Groundwater is the primary source of freshwater for communities in Soe Regency, located in the highland of West Timor Island, where surface water resources are limited. This study aims to characterize the groundwater system and assess its sustainability through an integrated approach combining geological mapping, hydrogeological observations, pumping tests, and hydrochemical analyses. Geological mapping identified two dominant lithological units: Quaternary coral limestone, functioning as the main aquifer, and the underlying Noele Formation, where marl layers act as an impermeable base. Hydrogeological surveys revealed four types of spring settings—rock unit contact, fracture-controlled, perched aquifer, and gravel contact springs—demonstrating the role of both karstification and structural controls in groundwater discharge. Groundwater level measurements show that recharge occurs in the northern highlands (elevations up to 1050 m), with flow directed southward and westward towards the Noelmina River. Pumping test results indicate discharge rates ranging from 1 to 11 L/s, with higher productivity in the southern areas. Hydrochemical analysis of 41 water samples shows TDS values of 261–500 mg/L, electrical conductivity of 400–1000 nS/cm (with a localized anomaly of 1200 nS/cm in Hane Village), and pH values of 6.6–8.5, all within safe standards for human consumption.Based on these findings, the Soe groundwater basin is classified into three aquifer productivity zones: moderate, low, and rare. The system is dominated by shallow unconfined aquifers, which remain sufficient in both quality and yield for current needs. However, population growth and urban development pose risks to long-term availability. Therefore, conservation of the northern recharge area is essential, alongside regulation of groundwater abstraction, infrastructure improvements, and exploration of deeper confined aquifers to secure future water resources. This study contributes a comprehensive framework for groundwater system characterization in structurally complex karst environments, providing critical guidance for sustainable water management in semi-arid highland regions.
Persebaran Pola Struktur Geologi Melalui Pendekatan Topografi dan Morfologi Daerah Tancep dan Sekitarnya, Gunungkidul, Yogyakarta Adha, Ikhwannur; Mardiati, Dani; Kurniawan, Oki; Utama, Peter Pratistha; Rachman, Muhammad Gazali; Krisnabudhi, Alfathony
Jurnal Ilmiah Geologi PANGEA Vol. 11 No. 1 (2024): Jurnal Ilmiah Geologi Pangea
Publisher : PROGRAM STUDI TEKNIK GEOLOGI FAKULTAS TEKNOLOGI MINERAL UPN VETERAN YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jigp.v11i1.12752

Abstract

Tancep merupakan desa yang berada di tenggara Bayat dan perbatasan antara Klaten dan Gunungkidul. Tancep dan sekitarnya memiliki struktur geologi yang cukup kompleks sebagaimana area yang berdekatan dengan Bayat. Penelitian terdahulu menyatakan bahwa struktur geologi yang berkembang pada lokasi ini cukup kompleks terutama sesar yang terbentuk. Namun, dari penelitian terdahulu tersebut kurang menggambarkan bagaimana persebaran pola struktur geologinya. Kajian pendahuluan ini dilakukan untuk menunjukkan persebaran pola struktur geologi yang berkembang di daerah Tancep dan sekitarnya melalui pendekatan topografi dan morfologi. Kajian ini dilakukan dengan harapan dapat memberikan gambaran awal untuk memetakan secara detil struktur geologi di lokasi tersebut. Penelitian dilakukan dengan pendekatan topografi dan morfologi serta interpretasi berdasarkan penelitian terdahulu. Analisis pada penelitian ini dilakukan dengan menggunakan analisis kelurusan topografi dan morfologi baik kelurusan punggungan bukit, kelurusan lembah, maupun kelurusan sungai. Kelurusan tersebut digambarkan dalam peta fault fracture density yang kemudian diinterpretasikan pola persebaran struktur geologi di daerah penelitian. Tancep dan sekitarnya secara umum memiliki tiga arah umum kelurusan topografi dan morfologi yaitu berarah barat daya-timur laut, barat laut-tenggara, dan utara-selatan. Pola kelurusan ini diinterpretasikan sebagai pola struktur geologi yang berkembang dan mengontrol topografi dan morfologi daerah penelitian. Pola struktur geologi berarah barat daya-timur laut merupakan pola utama yang berkembang di daerah penelitian. Sedangkan pola struktur geologi berarah barat laut-tenggara dan utara-selatan merupakan pola struktur geologi penyerta yang terbentuknya dapat terjadi karena beberapa kemungkinan.Kata Kunci: Tancep, Pola Struktur Geologi, Kelurusan.
Co-Authors Adha, Ikhwannur Alfathony Krisnabudhi Dani Mardiati, S.T., M.Eng. Eko Wibowo Favali, Falkis Edo Kurniawan, Oki Lisan, Ahmad Rif'an Khoirul Nugraha, Muhammad Reyfangga Aji Putra Nurwantari, Nanda Ajeng Oki Kurniawan, S.T., M.T. Peter Pratistha Utama Sarastika, Tiara Zelvany, Zshelda Tiara