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All Journal IJOG : Indonesian Journal on Geoscience Journal of Geoscience, Engineering, Environment, and Technology Journal of Engineering and Technological Sciences
Meli Hadiana
Geological Engineering Study Program, Faculty of Earth Sciences and Technology, ITB
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Physics

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Analogue Modeling of Oblique Convergent Strike-Slip Faulting and Application to The Seram Island, Eastern Indonesia Sapiie, Benyamin; Hadiana, Meli
Indonesian Journal on Geoscience Vol 1, No 3 (2014)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (396.003 KB) | DOI: 10.17014/ijog.1.3.121-134

Abstract

DOI:10.17014/ijog.v1i3.189Sandbox experiment is one of the types of analogue modeling in geological sciences in which the main purpose is simulating deformation style and structural evolution of the sedimentary basin.  Sandbox modeling is one of the effective ways in conducting physically modeling and evaluates complex deformation of sedimentary rocks. The main purpose of this paper is to evaluate structural geometry and deformation history of oblique convergent deformation using of integrated technique of analogue sandbox modeling applying to deformation of Seram Fold-Thrust-Belt (SFTB) in the Seram Island, Eastern Indonesia. Oblique convergent strike-slip deformation has notoriously generated area with structural complex geometry and pattern resulted from role of various local parameters that control stress distributions. Therefore, a special technique is needed for understanding and solving such problem in particular to relate 3D fault geometry and its evolution. The result of four case (Case 1 to 4) modeling setting indicated that two of modeling variables clearly affected in our sandbox modeling results; these are lithological variation (mainly stratigraphy of Seram Island) and pre-existing basement fault geometry (basement configuration). Lithological variation was mainly affected in the total number of faults development.  On the other hand, pre-existing basement fault geometry was highly influenced in the end results particularly fault style and pattern as demonstrated in Case 4 modeling.  In addition, this study concluded that deformation in the Seram Island is clearly best described using oblique convergent strike-slip (transpression) stress system.
Fault Surface Rupture Modeling Using Particle Image Velocimetry Analysis of Analog Sandbox Model Furqan, Terry Alfa; Sapiie, Benyamin; Natawidjaja, Danny Hilman; Widodo, Lilik Eko; Rudyawan, Alfend; Hadiana, Meli
Journal of Engineering and Technological Sciences Vol. 56 No. 1 (2024)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2024.56.1.10

Abstract

This study investigated the correlation between fault kinematics, surficial displacement, and surface rupture geometry patterns between earthquake cycles using particle image velocimetry (PIV) analysis of an analogue sandbox modeling that mimics InSAR observations. The research explored various fault systems, including reverse, normal, and strike-slip faults, through controlled sandbox experiments. The fault surface rupture zone manifests itself due to strain accumulation between two mobile blocks. The displacement magnitude is most pronounced on the surface and is absorbed by the section above the hanging wall or moving block. During fault surface rupture formation, the leading edge of the surface movement consistently extends beyond the anticipated fault surface rupture zone and retreats upon full fault surface rupture development. Subsequently, the distribution of the surface movement is sharply confined by the established fault surface rupture. The key findings of this study underscore the potential of PIV of sandbox modeling for studying fault surface rupture geometry and its development, providing insight into seismic processes. Overall, this work contributes to advancing our knowledge of seismic phenomena and improving strategies for earthquake prediction and mitigation.
Geology and Identification of Freshwater Sources Using Water Resistivity Survey in Landu Village, Rote Ndao, East Nusa Tenggara, Indonesia Gunawan, Indra; Rudyawan, Alfend; Pamumpuni, Astyka; Handayani, Alfita Puspa; Hadiana, Meli; Sapiie, Benyamin; Febrianti, Adinda
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 02 (2025): JGEET Vol 10 No 02 : June (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.02.21729

Abstract

Located within the tectonically complex Banda Arc of eastern Indonesia, Landu Island, in Rote Ndao, East Nusa Tenggara provides a unique setting to investigate the relationship between arc-continent collision, karst development, and groundwater dynamics. The island is primarily underlain by Quaternary limestones, which form the principal aquifer system. Despite this hydrogeological potential, Landu faces acute freshwater shortages, particularly during the dry season. This study combines geological field mapping with a 1D electrical resistivity survey to characterize subsurface lithology, identify groundwater-bearing units, and assess the extent of seawater intrusion. The geological survey reveals slightly southward-tilted, fossiliferous limestones that exhibit clear evidence of karstification, indicating a history of tectonic uplift and surface water infiltration. A freshwater spring—currently the main source of potable water for the local population—was documented in the southeastern part of the island, with a total dissolved solids (TDS) concentration of 924 ppm, suggesting moderate water quality. Resistivity modeling identifies two potential aquifers: a shallow zone at depths of 5.2–17.2 m, and a more extensive, deeper reservoir between 35.1–92.1 m. The shallow aquifer shows lower resistivity values, indicative of possible saltwater mixing, which correlates with historical reports of failed boreholes in this zone. In contrast, the deeper aquifer exhibits higher resistivity signatures, suggesting better preservation of freshwater and greater potential for sustainable extraction. These findings highlight the critical influence of structural controls and karst processes on groundwater storage and quality. The study emphasizes the need for careful aquifer targeting and protection measures to prevent saltwater intrusion. Future work should focus on high-resolution geophysical imaging and long-term monitoring to support resilient water resource management on Landu Island.
Co-Authors Alfita Puspa Handayani Benyamin Sapiie Benyamin Sapiie Danny Hilman Natawidjaja Febrianti, Adinda Furqan, Terry Alfa Indra Gunawan Lilik Eko Widodo Pamumpuni, Astyka Rudyawan, Alfend