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All Journal Bulletin of Scientific Contribution : Geology Journal of Geoscience, Engineering, Environment, and Technology Journal of Geosciences and Applied Geology
Iskandarsyah, Teuku Yan Waliana Muda
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science Physics

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Journal : Journal of Geosciences and Applied Geology

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Rock Characteristics as The Basis of Aquifer Determination In Cianjur Sub-Watershed, Cugenang District, Cianjur Regency, West Java Province Husaeni, Ahmad; Listiawan, Yudhi; Fachrudin, Kurnia Arfiansyah; Iskandarsyah, Teuku Yan Waliana Muda
Journal of Geological Sciences and Applied Geology Vol 5, No 1 (2021): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v5i1.34872

Abstract

Based on Presidential Decree Number 12 of 2012, this research area is part of the Upstream Citarum watershed and part of the Citarum River Basin. The boundary of this research area is the Cianjur Sub-watershed which has an area of approximately 41.0 km2. The research area is the eastern part of Mount Gede. This study aimed to determine the characteristics of the lithology as the basis of aquifer determination that composed the research area based on the results of surface geological mapping and supported by petrographic analysis. This research used a method split into several stages, namely the stages of fieldwork, rock sampling, and laboratory analysis. At the fieldwork stage, geological mapping of the surface was carried out by observing rock outcrops in the research area. At the sampling stage, it is done by taking rock samples representing each rock unit in the research area. As for the last stage, laboratory analysis is performed using the petrographic analysis method, namely the analysis of thin sections on rock samples to observe each of the mineral contained and porosity characteristics in the rock samples. The results of the thin section analysis are then compared with the existing classifications. Based on the results of the analysis, the research area is composed of igneous rocks, volcanic rocks, and pyroclastic rocks which are divided into three (3) units, namely the Volcanic Breccia Unit (SBv), Volcanic Tuff Unit (STv), and Volcanic Lava Unit (SLv). Based on these three units of lithology, SBv which is a unit of volcanic breccia is an aquifer
Geological Hazard Potential Using Scoring And Weighting Method In Citeureup Sub-watershed, Citeureup District And Surrounding Area, Bogor Regency Adji, Andika Rhadiya Putra; Iskandarsyah, Teuku Yan Waliana Muda; Listiawan, Yudhi
Journal of Geological Sciences and Applied Geology Vol 8, No 1 (2024): Journal of Geological sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v8i1.57037

Abstract

Geological hazards are hazard caused by geological processes. Citeureup Sub-watershed, located in Bogor Regency, is a densely populated area threaten by geological hazards. The purpose of this study is to determine the distribution of geological hazards using scoring and weighting method. Factors that analyzed to determine hazards potential including: slope, rocks physical property, lineament density, and rainfall. Hazard potential in study area divided into five different levels, ranging from very low to very high, with geological hazards in the form of mass movement and earthquake. Main factor of mass movement hazard potential is slope, meanwhile earthquake potential hazard main factor is lineament density, which indicates geological structure. Rocks physical property and rainfall are supporting factors that can increase geological hazards potential.
Co-Authors Adji, Andika Rhadiya Putra Ahmadjayadi, Tigfhar Brilian, Ciria Humanis Fachrudin, Kurnia Arfiansyah Hendarmawan Hendarmawan, Hendarmawan M. Nursiyam Barkah, M. Nursiyam Nana Sulaksana Pramudyo, Tulus Trisnadiansyah, Mochamad Ridfan Uus Ahmad Husaeni Virgianty, Aisyah Shafa Yudhi Listiawan