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All Journal POSITRON JGE (Jurnal Geofisika Eksplorasi) Jurnal Geosaintek Journal of Geoscience, Engineering, Environment, and Technology JTERA (Jurnal Teknologi Rekayasa) Spektra: Jurnal Fisika dan Aplikasinya Journal of Multidisciplinary Academic Jurnal Abdi Masyarakat Indonesia
Antosia, Risky Martin
Department Of Geophysical Engineering, Sumatera Institute Of Technology, Jalan Terusan Ryacudu, Way Huwi, Jati Agung, Kabupaten Lampung Selatan, Lampung, Indonesia
Aerospace Engineering Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences

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Journal : POSITRON

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Beneath the Surface: Identifying Subsurface Caves in "Gua Pandan" Using Integrated Electrical Profiling Method Antosia, Risky Martin; Akbar, Hendra Hidayat; Santoso, Nono Agus; Putri, Intan Andriani; Farishi, Bilal Al; Natalia, Happy Christin
POSITRON Vol 13, No 1 (2023): Vol. 13 No. 1 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v13i1.63558

Abstract

One of the geopark tourism areas in East Lampung Regency, "Gua Pandan," has run into rock subsidence on the surface. As part of the subsidence prevention, indirect electrical methods between resistivity and chargeability profiling were applied to identify the presence of a subsurface cave in the study area. Two measurement lines were carried out with Wenner Alpha and Wenner Schlumberger arrays. Because the depth target is shallow (approximately 10 m) and to obtain a better resolution, each line has a stretch length of 70 m and 2 m electrode spacing. A line was measured over a known underground cave to produce a desired outcome, and the other was in an area with no cavities. Based on the results from each profile of resistivity and chargeability, an air-filled target has a value of over 5,000  and under 6 ms, respectively. Then, integrated processing of both methods generated a metal factor (MF) profile to view the presence and estimated shape of the cave/ cavities. The result represents that an MF value under 1.5 ms/Ωm is a cavity, and solid rock is over 1.5 ms/Ωm. Also, the MF level from both configurations delineates a similar section. However, a modest difference occurs in estimating the cavity shape geometry,  for Wenner Apha and  for Wenner Schlumberger. Furthermore, this study can be an initial step in safety assessment in the area.
Co-Authors Akbar, Hendra Hidayat Andreas Maruli Pakpahan Angga Jati Widiyatama Bilal Al Farishi Dimas Setiawan Ekawati, Gestin Mey Erlangga, Mokhammad Puput Farduwin, Alhada Farishi, Bilal Al Hissy Ijitiha Sari Intan Adiani Putri Irawati, Selvi Misnia Muhammad Ramdan Natalia, Happy Christin Nono Agus Santoso Nono Agus Santoso Purwaditya Nugraha Putri, Intan Andriani Reza Rizki Rhahmi Adni Pesma Rhahmi Adni Pesma Ruhul Firdaus Santoso, Nono Agus Sillak Hasiany Yudha Styawan