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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal)
Zulfiah
Universitas Pattimura
Agriculture, Biological Sciences & Forestry Astronomy Chemistry Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics

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Characterizing Groundwater Aquifers in Warasia, Ambon City Using Electrical Resistivity Tomography Data and Archie's Law Samsul Bahri; Zulfiah; Muh. Riswan Anas Sukri; Yohanis Toni Batlolona; Wildan Nur Hamzah
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 15 No. 1 (2025)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v15n1.p27-39

Abstract

Identifying aquifer characteristics is vital for groundwater management, especially in volcanic terrains. This study employs Electrical Resistivity Tomography (ERT) combined with Archie's Law to delineate subsurface lithology and estimate aquifer porosity in Warasia, Ambon City. Field data were collected using a resistivity meter with two ERT profiles extending 120 meters each. The resistivity data were processed and modeled using RES2DINV, while water samples from wells were analyzed for physical parameters, including pH, conductivity, and total dissolved solids (TDS). The results reveal aquifers at depths of 3–5 meters, primarily hosted in volcanic tuff with resistivity values of 4.22–72.7 Ωm, indicating moderate to fair porosity (7.20%–14.01%). In contrast, lava formations exhibit significantly lower porosity (0.82%–1.02%) due to their solid structure. Archie's Law was instrumental in correlating resistivity with porosity, considering local lithological variability. The findings underscore the effectiveness of integrating ERT and Archie's Law for groundwater exploration in complex geological settings.
Studi Endapan Paleotsunami di Desa Hila, Kecamatan Leihitu, Kabupaten Maluku Tengah, Provinsi Maluku Anisha Marizka Angkotasan; Zulfiah; Aswan
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 3 (2026): August (Inpres)
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i3.2679

Abstract

Hila Village, located in Leihitu District, has a historical record of a major tsunami event in 1674; however, the geological evidence of this event has not been comprehensively studied. This research aims to identify and characterize paleotsunami deposits in Hila Village and to distinguish them from modern beach deposits and other coastal sediments. The study employed field observations, megascopic fragment analysis, granulometric analysis, and laboratory identification of foraminiferal microfauna. The results indicate that the paleotsunami deposits are characterized by poorly sorted sediments with grain sizes ranging from fine sand to gravel and cobble, erosional basal contacts, mixed lithic fragments, and benthic foraminifera derived from inner to outer neritic environments. Fragment analysis shows dominance of disc and blade morphologies, low sphericity, angular to sub-rounded roundness, and floating clasts within a sandy matrix. The deposits consist of mixed materials, including igneous rock fragments, coral debris, and anthropogenic materials, reflecting rapid high-energy transport and sediment mixing from multiple source environments. These characteristics clearly differ from modern beach deposits, which are generally better sorted, clast-supported, and influenced by repetitive wave abrasion processes.  
Co-Authors Anisha Marizka Angkotasan Aswan Muh. Riswan Anas Sukri Samsul Bahri Wildan Nur Hamzah Yohanis Toni Batlolona