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All Journal Journal of Geoscience, Engineering, Environment, and Technology Journal of Geosciences and Applied Geology
Brilian, Ciria Humanis
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Earth & Planetary Sciences Engineering Environmental Science Physics

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Geo-Environment Aspects Assessment Applied In Land Stability Determination Of A Disaster-Prone Area: A Case Study Around The Lembang Active Fault Zone, On The Western Part Of Bandung Basin, Indonesia Iskandarsyah, Teuku Yan Waliana Muda; Brilian, Ciria Humanis; Trisnadiansyah, Mochamad Ridfan; Listiawan, Yudhi; Barkah, M. Nursiyam; Sulaksana, Nana; Hendarmawan, Hendarmawan
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 3 (2024): JGEET Vol 09 No 03 : September (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.3.18062

Abstract

Rainfall, landforms, lithology or soil characteristics, and geological structures are geo-environment aspects that might be used to assess stability of the land in a disaster-prone area, e.g. in a case of study around the Lembang active fault zone of the western part of Bandung Basin, Indonesia. In this study, such geo-environment aspects were weighted and scored constantly in five class of value and importance, due to its influence on the land stability. After this scoring method applied, firstly, a land capability of the research area in relation to disaster potential will be recognized and used to analyze its land stability. According to such analyses, the study area can be divided into two zones of land stability, i.e. (i) moderate area which dominates the research area, and (ii) non-stable or unstable area near Lembang active fault zone. The dominant moderate and unstable area show that the fault zone has still widely affected the surroundings landscape and its physical characteristics. In fact, the current evaluation of existing landuse show that the development has been carried out intensively on these areas. It indicates that the development of the area is contituted as a high risk activity. Therefore, in this case, a good spatial planning or an environmental good governance must be applied appropriately in such disaster-prone area.
Control of Geological Structure on the Springs Distribution and Their Physical Properties. Case Study: Southern Slope of Mt. Lampobattang, South Sulawesi MAHENDRA, GALIH AJI; Waliana Muda Iskandarsyah, Teuku Yan; ismawan, Ismawan ismawan; Brilian, Ciria Humanis
Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): 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.v3i1.21235

Abstract

The study area is located at Southern Slope of Mt. Lampobattang, South Sulawesi. According to Armstrong (2012), Sulawesi is controlled by a complex geological structure. This condition can affect the characteristics of subsurface groundwater (Ismawan, 2013) specifically on the distribution and physical properties of springs. So, this research is needed to do. The aim of this study is to know the effect of geological structure on the distribution and physical properties of springs in the study area. This research was conducted with a qualitative analysis method of field data which resulted by geological and hydrogeological mapping at the study area. Based on the analysis results, the study area is consisted of 7 rock units consist of tuff, breccia and lava. There are 6 faults that control the study area with SW-NE and SE-NW trend. The study area is divided into 3 fracture density zones, those are low fracture density (0-500 M-1), medium fracture density (500-950 M-1), and high fracture density (950-1200 M-1). The geological structure affects the distribution of springs and their physical characteristics. This is evidenced by the appearance of springs along the fault and in the medium to high density zone. The characteristics of the Physical Properties of springs are influenced by the occurrence of faults and fractures in the study area that make the low values of EC and TDS. TDS values of springs have a vulnerable value of 0-193 ppm and EC values 0-357 μS. Therefore, the fracture and fault as the geological structure affect the distribution and physical properties of springs in the study area.
Co-Authors Hendarmawan Hendarmawan, Hendarmawan Iskandarsyah, Teuku Yan Waliana Muda ismawan, Ismawan ismawan M. Nursiyam Barkah, M. Nursiyam MAHENDRA, GALIH AJI Nana Sulaksana Trisnadiansyah, Mochamad Ridfan Waliana Muda Iskandarsyah, Teuku Yan Yudhi Listiawan