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All Journal POSITRON Journal of Degraded and Mining Lands Management Journal of Geoscience, Engineering, Environment, and Technology INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Mineral, Energi dan Lingkungan Jurnal Fisika Indonesia Jurnal Mineral, Energi dan Lingkungan Makara Journal of Science Jurnal Pertanian Agros
Eddy Hartantyo
Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Energy Engineering Environmental Science Materials Science & Nanotechnology Physics

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Analisis Potensi Tanah Longsor Menggunakan Metode Geolistrik di Dusun Plalar Kecamatan Banyubiru Kabupaten Semarang Lutfiana, Hilma; Wahyudi; Hartantyo, Eddy
Jurnal Mineral, Energi dan Lingkungan Vol 9 No 1 (2025): Jurnal Mineral Energi dan Lingkungan Volume 9, No. 1 Tahun 2025
Publisher : Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v9i1.14692

Abstract

Landslide in 2019 was the worst incident in Sodong Hamlet and Plalar Hamlet in Kemambang Village. To date, no scientific research has been conducted to assess the landslide potential in this area. Accordingly, this research aims to model subsurface lithological structure in landslide-prone zones -specifically in Plalar Hamlet- using the geoelectrical resistivity geophysical method. Data acquisition was carried out using the Electrical Resistivity Tomography (ERT) technique with a dipole-dipole configuration across six profiles, each extending 160 meters in length. Complementary Vertical Electrical Sounding (VES) surveys employing the Schlumberger array were also conducted at two locations. Interpretation of the data reveals the presence of a slip surface at a depth of approximately 15 meters, with an average slope inclination of 31o. Analysis of rainfall records indicates that landslide occurrences in the region are primarily triggered by high precipitation frequency during the December to February period. The potential runout distance of landslide material is estimate to be around 320 meters, with a projected flow velocity ranging between 1.5 and 2.0 meters per second. Furthermore, the maximum volume of displaceable weathered soil is estimated at approximately 200,000 m3. Keywords: geoelectrical; landslide; lithology
MATERIAL LONGSOR DAN CREEP MEMPENGARUHIAREA PERTANIAN DI SEKITAR DESA NGASINAN, PURWOREJO purnamasari, Anastasia; Sartohadi, Junun; Hartantyo, Eddy
Jurnal Pertanian Agros Vol 28 No 1 (2026): EDISI JANUARI
Publisher : Fakultas Pertanian Universitas Janabadra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37159/jpa.v28i1.169

Abstract

The area around Ngasinan Village is hilly with thick soil. The hilly and thick soil conditions make the area prone to landslides. The landslide area intersects with the Ngasinan residents' agricultural land. Landslide material from large landslides and soil movement (creep) can affect agricultural land. This study aims to identify landslide and creep areas that impact agricultural land. The methods used were aerial photography, direct field observation, and in-depth interviews. Based on field data collection, it can be seen that several areas experienced soil movement (creep). Creep damaged irrigation embankments and disrupted agricultural land. Several large landslide locations collapsed thick material, causing the landslide material to press on agricultural land. The community reported that the landslide material did not significantly disrupt agricultural yields, although the boundaries of the rice fields changed. The results of this study can be the beginning of further research related to landslide material entering agricultural land. Then, it will be used as a consideration by the government in constructing irrigation embankments.
Fast Dispersion-Curve Inversion using Automatic Differentiation Gradient-Based Calculation Irnaka, Theodosius Marwan; Hartantyo, Eddy
Makara Journal of Science Vol. 29, No. 4
Publisher : UI Scholars Hub

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Abstract

Surface wave inversion is a crucial technique in geophysics for subsurface imaging. However, traditional methods can be computationally intensive, especially for complex models. This study introduces automatic differentiation (AD) as an efficient alternative to finite difference (FD) methods for gradient calculation in surface wave inversion. We compare AD and FD methods using three synthetic examples of varying complexity. Our results demonstrate that AD is significantly faster, with speed improvements of 3 to 12 times over FD, depending on model complexity. Moreover, AD requires up to 3 times less memory than FD. In terms of accuracy, AD provides gradient calculations that are exact up to machine precision, while FD is subject to truncation errors. This improved accuracy translates to more reliable inversion results, particularly for complex models. The efficiency and accuracy gains of AD are especially beneficial for gradient-based inversion methods in geophysics, where computational resources often limit the scale and complexity of problems that can be addressed. Our findings suggest that integrating AD into gradient-based inversion methods could significantly enhance subsurface imaging techniques across various geophysical applications.
Vertical Electrical Sounding Analysis for Local Subsurface Water Bearing Identification Due to Isolated Hill. Case-study: Madurejo Village, Prambanan District, Yogyakarta Province, Indonesia Hartantyo, Eddy
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 10, No 01 (2020): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (608.599 KB) | DOI: 10.13057/ijap.v10i01.31426

Abstract

In a subsurface aquifer, there is a ‘barrier like’ phenomenon that blocks the flow of water. It will create a subsurface water bearing/dam and potential source for water well drilling. The existence of clay-limestone in the isolated hill in Madurejo village, Prambanan district, Yogyakarta seems to act like a natural groundwater body which is interesting to be analyzed by means of vertical electrical sounding (VES). For this purpose, three VES points measured with 150 meters apart, creating a line from south to north. Maximum distance for AB is 200 meters. We found the shallow unconfined from surface to 4 m depth and confined aquifers from 6 m to 29 m. The geometry of the second aquifer in combination with the existence of isolated hill seems to have a water-bearing structure which is very potential for water resources.
Co-Authors Ade Anggraini Agus Hendratno Diva Alfiansyah Ekrar Winata Imam Suyanto Irnaka, Theodosius Marwan Junun Sartohadi Lutfian Rusdi Daryono Lutfiana, Hilma Melania Seta Dhesty Wijayaningsih Mochamad Nukman Novia Nurul Khayati Novia Nurul Khayati Nur Wahyu Maulananingsih Nur, Rusnianti purnamasari, Anastasia Rusnianti Nur Satoru Kawasaki Skolastika Novita Sudarmaji WAHYUDI Wahyudi Wahyudi