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Al Rubaiyn
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Kantor Jurusan Teknik Geofisika, Gedung GKU Kampus Bumi Tridharma Anduonohu Kendari, 93132
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INDONESIA
Jurnal Rekayasa Geofisika Indonesia
Published by Universitas Halu Oleo
ISSN : 26858657     EISSN : 26858649     DOI : https://doi.org/10.56099/jrgi
Core Subject : Science, Engineering,
Computer Science & IT Earth & Planetary Sciences Engineering Physics
JRGI (Jurnal Rekayasa Geofisika Indonesia) merupakan jurnal ilmiah yang memuat hasil-hasil penelitian yang mencakup kajian teoretik, simulasi dan modeling, eksperimen, rekayasa dan eksplorasi dalam bidang Geofisika dan Aplikasinya. Bidang-bidang yang masuk dalam ruang lungkup jurnal ini adalah: Rekayasa Geofisika Seismologi Geofisika Perminyakan Fisika Teori Geofisika Komputasi Geofisika Instrumentasi Fisika Material Oseaografi Meteorologi (Fisika Atmosfer)
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geofisika
Articles 8 Documents
 1 
Search results for , issue "Vol. 6 No. 01 (2024): Edisi Arpil JRGI (Jurnal Rekayasa Geofisika Indonesia)" : 8 Documents clear
Analisis Ketebalan Lapisan Sedimen Menggunakan Metode Horizontal to Vertical Spectral Ratio (HVSR) di Daerah Perbukitan Kecamatan Moramo La Hamimu Hamimu; Laode Ihksan Juarzan; Nurul Irana Pathiasari
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v6i01.29

Abstract

This research aims to determine value of the thickness of sediment layer (h) and the type of soil layer in the hilly area of Moramo District. This research uses microtremor data obtained from the TDL-303S Seismometer at 15 points with a distance between points of 400 m–800 m and shear wave velocity values up to a depth of 30 m (Vs30) obtained from USGS website data. Microtremor data were analyzed using HVSR method with Geopsy 3.4.2 software to obtain the dominant frequency value. The shear wave velocity value was extracted using ArcGis 10.8 software to determine Vs30 value at each measurement point. The f0 and VS30 values are used to determine the sediment layer thickness (h). The analysis results show that sediment layer thickness range between 5,03 m–47,43 m. The distribution map of sediment layer thickness values shows that research area with high sediment layer thickness values is located in a small part of Ulusena Village and Watu Porambaa Village. So, these two areas are at greater risk of experiencing damage due to earthquakes. The type of soil layers based on soil classification by Kanai (1983) are classified into 4 types of soil with the research area being dominated by Type I soil, where this type is tertiary or older rock consisting of hard gravelly sandstone. Type I is located in Wonua Jaya Village, the western and southern parts of Sumbersari Village, the eastern part of Pudaria Jaya Village, as well as small parts of Watu Porambaa and Ulusena Village.
Identifikasi Intrusi Air Laut pada Air Tanah Menggunakan Metode Geolistrik Tahanan Jenis Wenner-Schlumberger (2D) di Pulau Balu, Desa Santiri, Kecamatan Tiworo Utara, Kabupaten Muna Barat Ikhsan Cahyadi; Syamsul Razak Haraty; La Ode Ihksan Juarzan
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v6i01.42

Abstract

This research aims to identify sea water intrusion in groundwater using the Wenner-Schlumberger configuration (2D) resistivity geolectric method on Balu Island, Santiri village, Tiworo Utara sub-District, West Muna Regency. This research uses primary data which is resistivty measurement data measured in the field aimed at identifying groundwater aquifers. The interpretation data is then reconstructed into 2D cross-sectional profile using Res2Dinv software. The results obtained in the research area show that sea water intrusion has occurred in groundwater at an average surface depth of up to 39.6 meters with low resistivity values ​​between 0.06 – 807 Ohm-meters
Estimasi Sumber Daya Lapisan Laterit Menggunakan Data Resistivitas di Desa Morombo Pantai Konawe Utara Juan Gilbert; Jahidin Jahidin; Al Rubaiyn
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v6i01.60

Abstract

This research was conducted in Morombo Pantai Village, Langgikima District, North Konawe Regency which aims to model nickel laterite deposits in 2D and 3D to describe the distribution of nickel laterite deposits in the subsurface based on resistivity values. The inversion process uses Res2DInv software to produce 2D ERT cross-sections and the distribution of resistivity values that provide an overview of the lithology in the subsurface. These results were then correlated with local coordinates and modeled in 3D using Rockworks17 software. The results show the distribution of laterite deposits with thicknesses ranging from 1.63 m to 59 m that spread from north to south. Based on the 3D modeling results, it is known that the resource of nickel laterite deposits at the research site reaches 2,931,836.0 m3 for the limonite layer and 3,820,284.0 m3 for the saprolite layer
Identifikasi Konfigurasi Struktur Geologi Bawah Permukaan Berdasarkan Data Anomali Medan Gravitasi dengan Teknik Deteksi Tepi dan Dekonvolusi Euler di Daerah Panas Bumi Lainea Nursinta Atsaniyah Misquita; Jamhir Safani; Al Rubaiyn
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v6i01.61

Abstract

this research is located in Lainea District, Lainea Village, Southeast Sulawesi, which aims to determine the subsurface structure based on the edge detection technique and determine the depth of the anomaly source using euler deconvolution. Fault segmentation with varying trends and depths illustrates the complexity of tectonic activity around the research area. The application of several edge detection techniques to the residual anomaly data shows the superiority of the TAHG approach in identifying the edges of geothermal source zones and the alignment of geological structures while the TDX approach only shows the boundaries of the anomalies. The euler deconvolution depth solution shows that the faults generated from the TAHG approach belong to shallow faults.
Analisis Kandungan Kapur (CaCO3) Pada Sumber Air Bersih Di Kelurahan Tampo Kecamatan Napabalano, Kabupaten Muna Sahidin Sahidin; La Aba Aba; Rosliana Eso; Ali Okto; Alfirrman Alfirman; La Ode Andimbara
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v6i01.69

Abstract

Salah satu indikator penting untuk penilaian air layak konsumsi bagi masyarakat adalah kandungan kapur atau biasa disebut sebagai kesadahan air. Menurut World Healt Organization (WHO), bahwa air yang mengandung zat kapur tinggi dapat menimbulkan dampak terhadap kesehatan seperti penyumbatan pembuluh darah jantung (cardiovascular desease), batu ginjal (urolithiasi) yang dapat menyebabkan kencing batu serta masalah kesehatan lainnya, masalah ekonomi seperti penggunaan detergen serta dalam bidang industri seperti adanya kerak pada mesin. Kandungan mineral yang terkandung dalam air sangat dipengaruhi oleh lingkungan sekitarnya. Kelurahan Tampo, Kecamatan Napabalano secara geologis tersusun oleh batugamping dan merupakan daerah karst yang berkembang dengan baik. Keberadaan daerah karst dan kondisi tipologi batuan, menjadikan wilayah Kelurahan Tampo sebagai daerah berkapur dan ancaman sumber air tanah memiliki kadar kapur yang cukup tinggi. Oleh Karena itu, perlu Identifikasi dan Pengukuran Kandungan Kapur (CaCO3) Sumber Air Bersih di Kelurahan Tampo, Kecamatan Napabalano, Kabupaten Muna. Penelitian ini dilaksanakan dengan Pengambilan sampel secara acak pada beberapa sumur gali masyarakat yang digunakan sebagai air bersih. Analisis sampel air yakni kadar kapur atau tingkatan kesadahan air dilakukan seacara kualitatif dan kuantitatif. Secara kulitatif menggunakan metode elektrokoagulasi sedangkan secara kualitatif menggunakan metode Atomic Absorption Spectrophotometry (AAS) dan Titrasi EDTA di Laboratorium Forensik FMIPA UHO. Berdasarkan hasil analisis laboratorim pada 12 sampel air, terdapat 11 sampel memiliki tingkat kesadahan tinggi dan 1 sampel memiliki tingkat kesadahan rendah. Jadi, secara keseleuruhan sampel air yang ada di Kelurahan Tampo memiliki tingkat kesadahan yang cukup tinggi
Analisis Stabilitas Lereng Jalan di Kecamatan Wolasi Kabupaten Konawe Selatan Provinsi Sulawesi Tenggara Laode Jonas Tugo; La Ode Sahidin; Ali Okto; Indrawati
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v6i01.71

Abstract

The provincial road that stretches in Wolasi District, Matawolasi Village, South Konawe Regency, has hilly and mountainous topography. The road cuts through hillsides and mountains, resulting in the formation of a steep slope on one side of the road. Such conditions can pose a threat in the form of landslides or mass movement of rock/soil which can occur at any time. This research aims to analyze the characteristics of the rock mass and evaluate the stability of the road slope. To achieve the research objectives, several stages were carried out, namely field measurements, data processing (determining the type of landslide and empirical parameters) and slope stability analysis. The field measurement method used is the scanline method. The methods used to analyze slope stability are kinematic, analytical and Slope Stability Probability Classification (SSPC) methods. The research results show that the types of landslides at the observation station consist of plane landslides and wedge landslides. The probability value of slope stability at 10 observation station points is above 95%. This is confirmed by the results of the slope safety factor (FK) calculation which shows that the overall FK value of the slope is above 3.
Eksplorasi Air Tanah di Desa Langori, Kecamatan Baula, Kabupaten Kolaka, Menggunakan Metode Resistivitas Schlumberger Usmardin Usmardin; Jahidin Jahidin
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v6i01.72

Abstract

Efforts have been made to search for subsurface water sources using geophysical methods, namely the Schlumberger resistivity method by mapping groundwater resources. This research aims to determine the existence of groundwater resources in the Kolaka Regency area, especially Langori Village, Baula District. Data collection was carried out at two measuring locations and processed using Progress. The results show a profile of groundwater resistivity values of 3.32 Ωm – 48.96 Ωm at a depth of 4.92 m to 370 m. It is suspected that the groundwater layer for measuring location point 1 or line 1 is at several depths, 8.57 m - 9.42 m, 13.30 m - 27.22 m, 166.28 m - 188.36 m, and 249.78 m - 370 m, each of which has a resistivity value of 26.95 Ωm, 6.52 Ωm, 31.54 Ωm, and 31.82 Ωm. Measuring location point 2 or line 2, the suspected groundwater layer is found at a depth of 4.92 m - 8.55 m, 20.53 m - 31.60 m, and 70.73m - 117.42 m, respectively each has a resistivity value of 41.91 Ωm, 3.32 Ωm, and 32.11 Ωm.
Identifikasi Potensi Air Tanah di Pulau Katela Kabupaten Muna Barat Menggunakan Metode Geolistrik Resistivitas La Ode Andimbara; Sawaludin Sawaludin
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v6i01.74

Abstract

Island Katela has a population of 957 people. Currently, the community has difficulty getting clean water. Activities to identify potential groundwater resources on Katela Island need to be carried out to solve this problem. The purpose of this research activity is to identify the subsurface of the land on Katela Island, West Muna Regency using the geoelectric resistivity method to obtain information on the potential of the groundwater layer. The main objective is to determine the existence of groundwater resources on Katela Island where the presence of groundwater is depicted in 2-dimensional (2D) and 1-dimensional (1D) subsurface resistivity cross-sectional models. The results obtained show that the structure of the subsurface layers in the survey area consists of layers of clay, sand, sandstone, limestone, salt water layers and groundwater (fresh) layers. The potential existence of a groundwater layer (fresh) is at a depth of 31.25 m at Site 1, with a resistivity value above 0.2 Ωm to 1 Ωm. This layer is thought to be a fresh water layer because above it there is a layer of clay which is impermeable so it is difficult for sea water to intrude. Based on resistivity data, at shallow depths (at the surface to a depth of 25 m) in the survey area sea water has been intruded.

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