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Tanah Goyang: Jurnal Geosains
Published by Universitas Pattimura
ISSN : -     EISSN : 30263263     DOI : https://doi.org/10.30598/tanahgoyang.2.2.67-76
Core Subject : Engineering,
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture
Tanah Goyang is published by Pattimura University, with a biannual periodicity in May and November. The journal covers topics related to geology, geoinformation, geocomputation, geophysics, and geosciences.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 27 Documents
 1   2   3 
Pemodelan Inversi Data Vertical Electrical Sounding (VES) Menggunakan Hybrid Differensial Evolution Flower Pollination Algorithm (HDEFPA) Pattiasina, Liora Chrissa; Warsa, Warsa; Bahri, Samsul
Tanah Goyang : Jurnal Geosains Vol 2 No 2 (2024): Tanah Goyang : Jurnal Geosains
Publisher : Program Studi Teknik Geofisika, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/tanahgoyang.2.2.108-121

Abstract

Geoelectric Resistivity is a geophysical method for mapping subsurface resistivity. Vertical Electrical Sounding (VES) is often used because of its ease in providing information on vertical lithological distribution. Modeling inversion of VES data is a complex challenge due to the non-linear relationship between data and model parameters. This research uses the Hybrid Differential Evolution Flower Pollination Algorithm (HDEFPA) as a global optimization method to overcome this problem. HDEFPA combines Flower Pollination (FPA) and Differential Evolution (DE) algorithms, which have both global and local search capabilities. Tests were carried out with synthetic VES data on two-layer, three-layer (K-type and H-type), and four-layer earth models. In addition, field data from seawater intrusion in Pelauw, Maluku, Indonesia were used. The results show that HDEFPA is superior to FPA and single DE in fast convergence and fewer iterations. The HDEFPA algorithm successfully validates field data, producing reliable and accurate results. This research provides insight into the advantages of global optimization methods over local inversion methods in inversion modeling of VES data.
Analisis Kualitas Airtanah Berdasarkan Sifat Fisik dan Kimia di Kemusu, Boyolali, Provinsi Jawa Tengah Joris, Kezia; Kusumayudha, Sari Bahagiarti; Harjanto, Agus; Helmi, Hurien
Tanah Goyang : Jurnal Geosains Vol 3 No 1 (2025): Tanah Goyang : Jurnal Geosains
Publisher : Program Studi Teknik Geofisika, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/tanahgoyang.3.1.9-17

Abstract

Sumur gali di daerah Kemusu dan sekitarnya di Kabupaten Boyolali diperuntukan untuk kebutuhan air minum sehingga sangat diperlukan analisis kualitas airtanah. Fisik dan kimia airtanah sangat dipengaruhi oleh batuan dan bagaimana kondisi lingkungan di permukaan. Berdasarkan hasil pengamatan di lapangan daerah penelitian disusun atas batupasir karbonatan, batulempung karbonatan, breksi andesit dan endapan alluvial. Pengukuran fisik dilakukan dengan pengukuran langsung pada sumur gali warga meliputi pengamatan warna, bau, rasa, kekeruhan, Daya Hantar Listrik, Total Dissolve Solid, Derajat Keasaman (pH), temperature dan secara kimia meliputi uji kadar besi (Fe), mangan (Mn), klorida (Cl-), sulfat (SO4), dan CaCO3. Berdasarkan pengukuran secara fisik nilai DHL dan TDS di sumur gali S9, S12, S3 airtanah tidak layak dikonsumsi dengan kadar DHL > 1000 dan menurut No.416/MENKES/PER/IX/1990. Secara kimia didasarkan pada kekeruhan air dan nilai TDS yang mewakili rendah dan tinggi sehingga dapat dijadikan perbandingan yaitu pada sumur S4, S5, dan S12. Hasil uji kimia menunjukkan bahwa sumur S4 dan S12 tidak layak dikonsumsi dikarenakan tingginya kadar sulfat diatas > 250mg/l. Kandungan CaCO3 yang tinggi namun masih tergolong aman dikarenakan litologi penysusun yang mengandung karbonat mempunyai kontak dengan airtanah.
Penerapan Teknologi Penginderaan Jauh untuk Kajian Indeks Kerapatan Vegetasi (NDVI) Tahun 2020 di Kecamatan Sirimau Limehuwey, Resti; Kololu, Micky; Kotarumalos, Sitti Hafsa; Multi, Warni
Tanah Goyang : Jurnal Geosains Vol 3 No 1 (2025): Tanah Goyang : Jurnal Geosains
Publisher : Program Studi Teknik Geofisika, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/tanahgoyang.3.1.1-8

Abstract

This study aims to examine the distribution of vegetation density in Sirimau District using the NDVI method calculated from Landsat 8 satellite imagery. Landsat 8 imagery is processed to obtain NDVI values ​​that describe the level of vegetation density and health in the study area. The results of the analysis show that most of the Sirimau District area is dominated by dense vegetation with NDVI values ​​between 0.63 and 0.80 covering around 57.8% of the total area. In addition, vegetation is quite dense with NDVI values ​​between 0.42 and 0.63 and vegetation is not dense with NDVI values ​​between 0.21 and 0.42 occupying around 20.4% and 14.7% of the area, respectively. While non-vegetation and clouds and air only occupy a small part of the area with percentages of 7.1% and 0.003% of the total area, respectively. This study proves that the use of remote sensing technology, especially Landsat 8 imagery, is effective in mapping and integrating vegetation conditions quickly and accurately. The results of this study are expected to support natural resource management and spatial planning in Sirimau District.
Studi Evaluasi Parameter Reservoir Berdasarkan Data Buildup pada Sumur X Pattipawaej, Sandro Clief; Usmany, Sean Dave
Tanah Goyang : Jurnal Geosains Vol 3 No 1 (2025): Tanah Goyang : Jurnal Geosains
Publisher : Program Studi Teknik Geofisika, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/tanahgoyang.3.1.18-24

Abstract

Well testing adalah salah satu metode yang dapat dimanfaatkan untuk memperkirakan parameter reservoir. Terdapat dua data pada well testing yaitu data drawdown dan data buildup. Type curve matching adalah salah satu metode yang dikembangkan untuk menganalisis data drawdown, sedangkan metode horner dikususkan untuk menganalisis data buildup. Dengan melakukan penyesuaian pada data tekanan dan turunannya, data buildup dapat dianalisis menggunakan metode type curve matching. Metode type curve matching memberikan nilai permebailtas reservoir, skin, dan nilai wellbore store masing-masing sebesar 596.31 mD, -0.28, dan 0.008. Nilai permeabilitas dan skin berdasarkan metode horner didapat sebesar 550.51 mD dan -0.31. Hasil analisis ini menunjukan bahwa reservoir baik dikembangkan untuk produksi.
Interpretasi Data Anomali Magnetik di Daerah Wakal, Maluku Tengah Multi, Warni
Tanah Goyang : Jurnal Geosains Vol 1 No 2 (2023): Tanah Goyang : Jurnal Geosains
Publisher : Program Studi Teknik Geofisika, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/tanahgoyang.1.2.73-81

Abstract

Pengetahuan tentang litologi batuan penyusun bawah permukaan merupakan suatu kajian yang perlu dipahami dengan baik oleh pemerintah setempat. Hal ini penting untuk lakukan guna mengetahui potensi sumber daya mineral ekonomis maupun terkait penyusun lapisan batuan bawah permukaan di suatu area. Di daerah Wakal informasi tersebut belum diketahui. Umumnya metode yang digunakan untuk memperoleh gambaran material bawah permukaan adalah geomagnet. Tujuan penelitian ini adalah mampu menginterpretasi material yang tersebar di daerah penelitian berdasarkan nilai medan magnet. Metode ini memanfaatkan anomali medan magnet untuk mengidentifikasi mineral tersebut. Data yang digunakan berjumlah 31 titik dengan spasi pengukuran sejauh 5 meter. Interpretasi dilakukan secara kualitatif dan kuantitatif menggunakan software Surfer, Magpick, dan Mag2dc. Hasil penelitian diperoleh peta kontur anomali magnetik yang memiliki harga antara -1000 nT hingga 900 nT. Hasil sayatan lintasan A-A’ diperoleh nilai suseptibilitas yang bervariasi yaitu material bawah permukaan yang terdiri atas metamorphic (60 nT) dan av. sedimentary (10 nT) cenderung memiliki anomali residual magnetik rendah sedangkan basalt (129.54 – 131.07 nT) dan andesite (168.12 nT) memiliki anomali residual yang relatif tinggi yang terdistribusi dari Barat Laut hingga Tenggara dari area pengukuran.
Identifikasi Air Tanah Menggunakan Electrical Resistivity Tomography di Lingkungan Sekolah Rakyat Menengan Atas 40 Ambon Latuconsina, Usman Aria Ramadhan; Kaharudin, Husnaniah; Sukri, Muh. Riswan Anas
Tanah Goyang : Jurnal Geosains Vol 3 No 1 (2025): Tanah Goyang : Jurnal Geosains
Publisher : Program Studi Teknik Geofisika, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/tanahgoyang.3.1.25-32

Abstract

Clean water availability is a vital requirement for supporting learning activities and maintaining health within educational environments. Sekolah Rakyat Ambon, located in Maluku, still experiences limited access to clean water due to complex local geological conditions and the absence of a well-identified groundwater system. This study aims to identify potential aquifer zones around Sekolah Rakyat Ambon using the 2D Electrical Resistivity Tomography (ERT) method as a basis for groundwater drilling site selection. The survey was conducted along a 156-meter line with a 4-meter electrode spacing using the Wenner-Schlumberger configuration. The inversion results reveal a low-resistivity zone (10–50 Ωm) at a depth of approximately 25–30 meters, interpreted as a saturated aquifer layer. Based on this interpretation, drilling was carried to a depth of 30 meters. Borehole observations confirmed the presence of water-bearing sandy layers consistent with the ERT results. Physical water quality testing yielded values of pH 8.20, EC 273 µS/cm, TDS 146 ppm, salinity 0.001%, and specific gravity 1 g/cm³, indicating that the water is suitable for clean water use. The discharge measurement resulted in a flow rate of approximately 25 liters per minute, sufficient to meet the school’s daily water needs.
Pembuatan Progam Inversi Gayaberat 2D Menggunakan Algoritma Levenberg-Marquadt Kaharudin, Husnaniah; Bahri, Samsul; Dahrin, Darharta
Tanah Goyang : Jurnal Geosains Vol 3 No 1 (2025): Tanah Goyang : Jurnal Geosains
Publisher : Program Studi Teknik Geofisika, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/tanahgoyang.3.1.33-40

Abstract

This research implements 2D gravity data inversion using the Levenberg-Marquardt algorithm to analyze the sensitivity of modeling results to variations in initial models. Testing was conducted on two synthetic models, namely intrusion and fault, with density contrasts of 0.5 g/cm³ and 0.7 g/cm³ respectively. The inversion results demonstrate a critical dependence on the initial model. A homogeneous initial model produced distorted density estimates concentrated near the surface. Conversely, an initial model approximating the actual synthetic model yielded faster convergence and more accurate density distribution reconstruction. Comparative analysis revealed that the fault model achieved better fit, indicating the superior lateral resolution of the gravity method compared to its vertical resolution. These findings confirm that the accuracy of gravity data inversion heavily relies on geological constraints integrated through the initial model, where an informed approach produces more reliable subsurface models.

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