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All Journal POSITRON PRISMA FISIKA JURNAL FISIKA Majalah Geografi Indonesia SEMIRATA 2015 Jurnal Spektra JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Jurnal Fisika FLUX GERVASI: Jurnal Pengabdian kepada Masyarakat Physics Communication Community Empowerment JURNAL GEOGRAFIKA (GEOGRAFI LINGKUNGAN LAHAN BASAH) Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) BULETIN FISIKA
Joko Sampurno
Department of Physics, Faculty of Mathematics and Fundamental Sciences, Tanjungpura University, Jl. Prof. Dr. H. Hadari Nawawi, Pontianak, 78124, Indonesia
Aerospace Engineering Arts Humanities Astronomy Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Geophysical data acquisition education for high school students through field observation Muhardi, Muhardi; Putra, Yoga Satria; Perdhana, Radhitya; Jumarang, Muh Ishak; Sampurno, Joko; Muliadi, Muliadi; Ihwan, Andi; Adriat, Riza; Zulfian, Zulfian; Sutanto, Yuris; Faryuni, Irfana Diah
Community Empowerment Vol 10 No 3 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ce.12423

Abstract

Most high school students in Singkawang City and Bengkayang Regency still require a more comprehensive understanding regarding the application of geophysics, which can impact their skills in conducting field observations. This Community Service (PkM) aims to enhance students' skills in geophysical data acquisition through field observations at Karta Beach, Bengkayang Regency. The activity was carried out in three stages: preparation, implementation, and evaluation. During the implementation stage, participants were educated about geophysical data acquisition through field observations, including geoelectric, self-potential, meteorology, and geology practicums. Based on the evaluation results, a score of 87.31 (very good) was obtained, indicating an increase in students' skills in geophysical data acquisition through field observations.
Enhancing high school students’ understanding and skills in geophysical surveying and data processing: A service learning Jumarang, Muhammad Ishak; Putra, Yoga Satria; Muliadi, Muliadi; Ihwan, Andi; Sampurno, Joko; Faryuni, Irfana Diah; Zulfian, Zulfian; Adriat, Riza; Perdana, Radhitya; Muhardi, Muhardi
Community Empowerment Vol 10 No 6 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ce.12716

Abstract

Knowledge and skills in geophysical surveying and data processing are unique areas for high school students interested in environmental conditions. This community engagement activity aimed to enhance the understanding and skills of high school students in Pontianak City regarding geophysical surveying and data processing through direct field observations. The activity spanned five months, from June to October 2024, and included several stages: preparation, implementation, and evaluation. Evaluation was conducted with 41 participants, achieving a success index of 90.54%. These evaluation results indicate that the activity met the expectations of most participants. Key aspects such as participant satisfaction, program utility, material comprehension, presenter/facilitator delivery, and time allocation received very high appreciation from the participants.
How to Identify the Subsurface Layer of Bangkam Hill - Mempawah Regency? Application of the Geoelectrical Resistivity Method Ivansyah, Okto; Dilnalsyah, Felas; Sampurno, Joko; Muhardi, Muhardi
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 11 No 2 (2022): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v11i2.12714

Abstract

Mapping the subsurface is essential in rock exploration for construction to minimize costs and guide adequate mining planning. This study aims to identify the subsurface layer of Bangkam Hill, a depot of various rocks for construction materials located in Sungai Kunyit District, Mempawah Regency. A resistivity method was applied to map the sub-surface using the Wenner-Schlumberger configuration. Data acquisition was performed at six measurement lines to cover the hill. The results show that the subsurface layers of the hill from the ground to 40 m in depth are composed of sand, laterite soil, gravel, and igneous rock, with resistivity varying from about 30 to 693,055 Ωm. Using the subsurface map, the stakeholder can assess shallow rock reserves in the study area and create a proper mining strategy.
Study of the Secondary Flow Formed on Two-Channel Junction Using Computational Fluid Dynamics Pratiwi, Tasya Mahardika; Putra, Yoga Satria; Sampurno, Joko; Muhardi, Muhardi; Sutanto, Yuris
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 3 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i3.372

Abstract

Information about the secondary flow formed at the junction is crucial for identifying areas vulnerable to erosion. This study aims to build a water flow simulation at a two-channel junction with varying angles using Computational Fluid Dynamics (CFD). The goal of the simulation is to analyze the velocity changes on each variation of angles (90°, 70°, 50°, 30°, and 10°) on the two-channel junction. The validation of these flow patterns is significantly connected to the reference data. The secondary flow is formed as the impact of the velocity changes, and the main channel flow meets the branch channel flow. The flow patterns at the 90° junction exhibit similar formation, as evidenced by secondary zones formed around the junction, such as the contraction and separation zones. The contraction zone forms in areas near junctions with high-velocity values, while the separation zone develops in areas where velocity decreases due to the impact of two flows. This study found that CFD effectively analyses velocity changes on two-channel junctions.
Analisis Kerawanan Erosi Dengan Metode Clustering dan Pembobotan Berbasis Google Earth Engine di Kecamatan Toba, Kalimantan Barat Septi, Firli Nisa; Sampurno, Joko; Faryuni, Irfana Diah
Majalah Geografi Indonesia Vol 40, No 1 (2026): In Progres
Publisher : Fakultas Geografi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/mgi.111478

Abstract

Abstact. Erosi tanah merupakan salah satu permasalahan lingkungan yang signifikan dan perlu mendapat perhatian serius, khususnya di daerah dengan intensitas curah hujan tinggi serta perubahan tata guna lahan akibat aktivitas pertambangan, perkebunan, maupun aktivitas manusia lainnya, seperti yang terjadi di Kecamatan Toba, Kabupaten Sanggau, Kalimantan Barat. Kondisi ini tidak hanya dapat mengancam kelestarian dan fungsi lahan, tetapi juga berpotensi menurunkan kesuburan tanah, mengurangi produktivitas pertanian, serta mengakibatkan degradasi lingkungan yang berdampak langsung maupun tidak langsung bagi masyarakat serta ekosistem sekitarnya. Oleh sebab itu, penelitian ini bertujuan untuk menganalisis tingkat kerawanan erosi di Kecamatan Toba dengan memanfaatkan metode clustering dan pembobotan berbasis platform Google Earth Engine (GEE). Analisis dilakukan dengan lima parameter utama, yaitu kemiringan lereng, tekstur tanah, curah hujan, Indeks vegetasi (NDVI), dan tutupan lahan pada periode 2019–2024. Parameter-parameter ini diklasifikasi ke dalam lima kelas, kemudian dikombinasikan dengan pembobotan untuk menghasilkan peta tingkat kerawanan erosi. Hasil penelitian menunjukkan sebagian besar wilayah Kecamatan Toba berada pada tingkat kerawanan sedang hingga tinggi, dengan luasan masing-masing sebesar 55.898 ha (49,6%) dan 11.950 ha (10,6%). Area dengan kerawanan rendah tercatat seluas 42.331 ha (37,5%) dan area sangat rawan seluas 2.583 ha (2,3%), sedangkan kelas tidak rawan tidak ditemukan. Model peta kerawanan erosi divalidasi menggunakan data titik kejadian longsor sebagai proxy tingkat kerawanan erosi dan menghasilkan tingkat akurasi 98,61%. Dengan demikian, penelitian ini dapat memberikan informasi penting mengenai distribusi spasial tingkat kerawanan erosi dan menjadi acuan strategis bagi pemerintah daerah, peneliti, maupun pihak terkait lainnya dalam perencanaan pengelolaan lahan, penyusunan strategi konservasi tanah, serta upaya mitigasi risiko erosi secara tepat.Abstract.Soil erosion poses a major threat to environmental sustainability in humid tropical regions that are undergoing rapid land-use changes. The Toba District, Sanggau Regency, West Kalimantan, is particularly vulnerable because of the high rainfall intensity combined with extensive mining activities, plantation expansion, and other anthropogenic disturbances. These pressures accelerate land degradation, reduce soil fertility and agricultural productivity, and threaten the ecosystem services and local livelihoods. This study aimed to spatially assess and map soil erosion vulnerability in the Toba District, supporting sustainable land management and spatial planning efforts. The analysis was conducted using the cloud-based Google Earth Engine (GEE) platform, applying an integrated clustering and weighted overlay approach. Five key erosion-controlling parameters were incorporated: slope gradient, soil texture, rainfall intensity, vegetation condition represented by the Normalized Difference Vegetation Index (NDVI), and land cover dynamics from 2019 to 2024. Each parameter was classified and weighted according to its relative influence on erosion processes to produce a comprehensive erosion vulnerability map. The results indicate a widespread vulnerability to erosion across the study area. Medium-vulnerability zones dominated, covering 55,898 ha (49.6%), followed by low-vulnerability regions, which accounted for 42,331 ha (37.5%). High- and very-high-vulnerability classes accounted for 11,950 ha (10.6%) and 2,583 ha (2.3%), respectively, with no non-vulnerable areas identified. Validation against historical landslide data as a proxy for erosion vulnerability yielded an overall accuracy of 98.61%. The resulting map provides a robust decision-support tool for prioritizing soil conservation measures and strategies to mitigate erosion risk.Submitted: 2025-09-25 Revisions:  2025-11-19 Accepted: 2026-02-01 Published: 2024-02-06
Identification Of Peat Soil Thickness Using The Geolectrical Resistivity Method (Case Study: Parit Demang Dalam Road, Pontianak City) Can, Bella Ankara; Zulfian, Zulfian; Sampurno, Joko
BULETIN FISIKA Vol. 27 No. 1 (2026): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2026.v27.i01.p04

Abstract

Parit Demang is an area with peatland used for residential purposes, so information on soil thickness in this area is very important for development planning. This study aims to identify peat soil thickness using the Wenner-Schlumberger configuration of the geoelectric method. Data was obtained through three measurement lines, each 50 m long. The 2D inversion modeling at the study site showed that the resistivity values of the peat layer ranged from 32.4 to 315 Ωm, with peat soil thickness between 2.3 to 5.5 m. The interpretation results were validated with soil sample drilling data. The layer located under the peat soil was identified as clay with resistivity between 1.56 to 15.2 Ωm. Information on peat soil thickness can be used as a basis for selecting soil improvement methods by the local community and related parties for development planning, particularly in the process of house construction.
Identification of Peat Soil Thickness Using the 2D Electrical Resistivity Method: Case Study Bansir Darat Subdistrict, Pontianak City Noviandita, Dwi Ishika; Zulfian, Zulfian; Sampurno, Joko
BULETIN FISIKA Vol. 27 No. 1 (2026): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2026.v27.i01.p11

Abstract

Bansir Darat is a sub-district that utilizes peatland for residential areas. Therefore, information about peatland thickness is essential for the community in the sub-district. This study aims to identify the thickness of peatland in the Bansir Darat sub-district. The geoelectric resistivity method using the Wenner-Schlumberger configuration was used in this measurement. Data collection was carried out on three tracks with a length of 50 m each and the smallest electrode spacing of 2 m. The obtained field data were inverted using the Least Squares Inversion method. The inversion results in the form of a resistivity cross-section with peatland soil estimated to have a resistivity value of 0.687 - 24.2 Ωm. The interpretation results indicate that the thickness of the peatland varies between 1.5 - 6 m. Information regarding the thickness of the peatland can be used in planning residential development by the local community.
Tidal Flood Mapping with a Simple Bathtub Model in Sungai Kakap District, Indonesia Farhan, Andin Maulana Yusuf; Sampurno, Joko; Faryuni, Irfana Diah
Jurnal Geografika (Geografi Lingkungan Lahan Basah) Vol 6, No 2 (2025): GEOGRAFIKA
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jgp.v6i2.16880

Abstract

The Sungai Kakap District in West Kalimantan is highly vulnerable to tidal flooding (rob) because of its low-lying coastal environment. Accurate mapping of flood extent is crucial for supporting disaster risk reduction and mitigation planning. This study applied water level data combined with a Digital Elevation Model (DEM) processed using the Simple Bathtub Model to map tidal flood extent during the December 2024 event. The generated flood maps were further analyzed to assess their impact on infrastructure and population exposure. The validation results demonstrated that the model achieved an overall accuracy of 0.74 and a Kappa coefficient of 0.43, indicating that the Simple Bathtub Model provides a reasonably reliable representation of tidal flood extent. The analysis indicated that the December 2024 flood inundated approximately 150,000 m of road networks, submerged between 900 and 1,000 buildings, and affected an estimated 16,000 to 17,000 residents. These findings highlight the high vulnerability of low-lying coastal communities in West Kalimantan and demonstrate the value of adopting simple yet effective modeling approaches as practical tools for disaster risk reduction, mitigation planning, and long-term coastal resilience.
Co-Authors . Agato . Antonius, . . Apriansyah . Hasanuddin A.A. Ketut Agung Cahyawan W Abdul Muid Ananda, Ria Andi Ihwan Andriyani, Ririn Apriyanto Ramadhan Aripin Asri, Nurul . Azrul Azwar Bebeh Wahid Nuryadin Bedry Yuveno Denny Boni Pahlanop Lapanporo Budiman Budiman Can, Bella Ankara Chintia, Bella Dilnalsyah, Felas Eisar Gabela Evelin, Luluk Surya Farhan, Andin Maulana Yusuf Fatimah Arofiati Noor Iman Hakiki, Iman Iman Iman, Iman Insani, Windri Harsika Irfana Diah Faryuni Jaya, Maruta Prima Jumarang, Muh Ishak Maysharoh, Siti Mei Sari Soleha, Mei Sari Menas Aswan Miftahuddin, . Muh. Ishak Jumarang Muhardi Muliadi Muliadi Muliawan, Novi Riyandi Eka ningsih, Urai astri lidya Norsiah, Norsiah Noviandita, Dwi Ishika Nurhasanah Nurhasanah Nurhasanah Nurhasanah Okto Ivansyah Perdana, Radhitya Perdhana, Radhitya Pratiwi, Tasya Mahardika Rahmat Hidayat Ramadhaningsih, Laila Ramdani, Feri Riza Adriat Rusmawarningsih, Resi Sabariah Sabariah Sari, Kartika Kapuas Sari, Nur Novita Satria Putra, Yoga Septi, Firli Nisa Sofiani, Maria Tantri, Oktaviana Wafha Fardiah Widiastuti, Nanda Yoga Satria Putra Yudha Arman Yuris Sutanto Zulfian Zulfian