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All Journal Journal of Marine and Aquatic Sciences International Journal of Renewable Energy Development POSITRON PRISMA FISIKA BERKALA SAINSTEK Jurnal Sains dan Teknologi Jurnal Pendidikan Fisika Indonesia JURNAL FISIKA Journal of Degraded and Mining Lands Management Jurnal Fisika Unand Jurnal Perikanan dan Kelautan JGE (Jurnal Geofisika Eksplorasi) JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Jurnal Geosaintek BULETIN FISIKA JOURNAL ONLINE OF PHYSICS Jurnal Fisika FLUX Jurnal Geocelebes Jurnal Teknologi Mineral dan Batubara JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) Jurnal Geomine JIPF (Jurnal Ilmu Pendidikan Fisika) Acta Aquatica: Aquatic Sciences Journal INDONESIAN JOURNAL OF APPLIED PHYSICS BULLETIN OF THE MARINE GEOLOGY Buletin Sumber Daya Geologi Jurnal Laut Khatulistiwa Jurnal Geosains dan Teknologi Martabe : Jurnal Pengabdian Kepada Masyarakat BULETIN AL-RIBAATH GERVASI: Jurnal Pengabdian kepada Masyarakat Jurnal Geologi Kelautan: Media Hasil Penelitian Geologi Kelautan Jurnal Teori dan Aplikasi Fisika Indonesian Review of Physics (IRiP) Jurnal Fisika dan Terapannya Abdimas Galuh: Jurnal Pengabdian Kepada Masyarakat Bubungan Tinggi: Jurnal Pengabdian Masyarakat Marine Kreatif Jurnal Geosains dan Remote Sensing (JGRS) Community Empowerment Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) International Journal of Hydrological and Environmental for Sustainability Manfish Journal Jurnal Ilmu dan Inovasi Fisika Bina Bahari : Jurnal Pengabdian Kepada Masyarakat Wahana Fisika : Jurnal Fisika dan Terapannya Bulletin of Geology Geo-Image Journal
Muhardi
Program Studi Geofisika, Fakultas MIPA, Universitas Tanjungpura
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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Identification of Groundwater Aquifers Using Geoelectric Methods with Schlumberger Configuration in Peatland Areas, West Kalimantan, Indonesia Rasmi, Rasmi; Sutanto, Yuris; Perdhana, Radhitya; Muliadi, Muliadi; Muhardi, Muhardi; Marbun, Mahmuddin; Machmud, Amir; Pratiwi, Elok Surya
International Journal of Hydrological and Environmental for Sustainability Vol. 3 No. 1 (2024): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v3i1.388

Abstract

The geoelectric-resistivity method with Schlumberger configuration is commonly used for groundwater exploration. This method helps identify changes in the resistivity of rock layers beneath the Earth's surface by flowing direct current (DC). In this research, geoelectric-resistivity was used to search for the existence of groundwater aquifers in water crisis areas with peat soil structures. In addition, this research aims to determine the depth of the aquifer layer based on resistivity values below the surface and  to identify variations in resistivity values below the surface. The method used in this research was the Schlumberger configuration resistivity geoelectric method with 4 measurement points, each with  a stretch length of 500 m . The research results show that the subsurface resistivity value in the Parit Haji Muksin II area is 2.69 Ohm m to 264 Ohm m. The unconfined aquifer at the research location was found at point 1 and point 2 at a depth of 3.94 m to 35.5 m, while the confined aquifer was found at points 3 and 4 at a depth of 13.6 m to 61.8 m. This study indicates the presence of potential groundwater resources in tropical peatlands, highlighting the necessity for further comprehensive research to ensure their sustainable utilization in the future.
PEMETAAN SEBARAN MINERAL HEMATIT (Fe2O3) PADA ENDAPAN BAUKSIT DI KECAMATAN SANDAI, KALIMANTAN BARAT Putra, Yoga Abdul Malik; Muhardi; Perdana, Radhitya
Jurnal Teknologi Mineral dan Batubara Vol 20 No 1 (2024): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No1.2024.1551

Abstract

Hematite (Fe2O3) is one of the minerals in bauxite deposits with a content of 20-45%. Estimation of hematite (Fe2O3) distribution over a large area with limited sample availability can be conducted using the interpolation method. This study aims to map and estimate the distribution of hematite (Fe2O3), ore thickness, and overburden thickness at Bukit Zahra, Sandai District, Ketapang Regency, West Kalimantan Province. The interpolation method in this study uses the inverse distance weighted (IDW) method, while the power test uses the calculation of the smallest root mean squared error (RMSE). The estimation results show the highest hematite (Fe2O3) content in the bauxite deposit of 20-25% is located at an elevation of 22-62 m, while the lowest hematite (Fe2O3) content of 0-6% is located at an elevation of 22-30 m. The mapping results show a maximum ore thickness of 7-9 m at an elevation of 46-62 m, while the minimum ore thickness of 0-1 m is at an elevation of 22-54 m. The maximum thickness of overburden is 6-8 m at an elevation of 38-46 m, while the minimum thickness of overburden is 0-1 m at an elevation of 22-62 m. The mapping results also show that the distribution of hematite (Fe2O3), ore, and overburden in the research site is on a gentle to steep slope.
Identifikasi Litologi Area Rawan Longsor di Desa Clapar Menggunakan Metode Geolistrik Resistivitas Konfigurasi Schlumberger Muhardi, Muhardi; Wahyudi, Wahyudi
Jurnal Fisika Vol 9, No 2 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v9i2.21409

Abstract

Desa Clapar Kecamatan Madukara Kabupaten Banjarnegara merupakan salah satu daerah di Provinsi Jawa Tengah yang rawan terhadap bencana longsor. Penelitian ini dilakukan untuk mengetahui sebaran nilai resistivitas batuan bawah permukaan secara vertikal. Sebaran nilai resistivitas batuan akan dijadikan acuan dalam mengidentifikasi litologi bawah permukaan di area rawan longsor Desa Clapar. Penelitian ini dilakukan dengan menggunakan metode geolistrik resistivitas konfigurasi Schlumberger. Pengukuran dilakukan pada lima lokasi dengan bentangan masing-masing sejauh 200 m. Hasil penelitian mengidentifikasi sebaran resistivitas batuan bawah permukaan secara vertikal hingga kedalaman 58 m dengan nilai 0,71 hingga 717,78 Ωm. Litologi bawah permukaan area rawan longsor Desa Clapar berupa tanah penutup, pasir lempungan, lempung, batupasir, dan breksi.
Identifikasi Sebaran Intrusi Air Laut di Sekitar Area Pelabuhan Internasional Kijing, Kabupaten Mempawah menggunakan Metode Resistivitas Muslim, Muslim; Azwar, Azrul; Muhardi, Muhardi
Jurnal Fisika Vol 11, No 1 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v11i1.29138

Abstract

Penelitian intrusi air laut di daerah pesisir Desa Sungai Kunyit Laut, Kabupaten Mempawah telah dilakukan dengan menggunakan metode resistivitas konfigurasi Wenner–Schlumberger. Lokasi penelitian merupakan area di sekitar Pelabuhan Internasional Kijing, Propinsi Kalimantan Barat. Penelitian ini menggunakan 4 lintasan dengan panjang masing-masing 114 m dan jarak antar leketroda sejauh 5 m. Keempat lintasan masing-masing mewakili area yang berbeda, yaitu kurang lebih 25 m, 150 m, 520 m, dan 1 km dari garis pantai. Hasil penelitian menunjukkan bahwa nilai resistivitas sebesar 0,262 - 7,36 Ωm dengan kedalaman 1,25 m hingga lebih dari 28,7 m. Lapisan bawah permukaan di lokasi penelitian diinterpretasi tersusun atas 3 lapisan yaitu lapisan akuifer dangkal berupa pasir, lapisan lempung, dan lapisan setengah kedap air (akuitar) berupa lempung pasiran, pasir lempungan dan kerikil. Lapisan diduga sebagai akuifer dangkal dengan litologi berupa pasir telah terintrusi air laut dan menyebar hingga lebih dari 1 km dari garis pantai. 
Karakteristik Gelombang Laut di Perairan Pantai Samudera Indah Kabupaten Bengkayang Kalimantan Barat: Karakteristik Gelombang Laut di Perairan Pantai Samudera Indah Kabupaten Bengkayang Kalimantan Barat Adriat, Riza; Muhardi, Muhardi; Risko, Risko; Ramat, Muhammad Farhan
Jurnal Kelautan, Lingkungan, dan Perikanan Vol 5 No 1 (2024): MANFISH JOURNAL
Publisher : Jurusan Ilmu Kelautan dan Perikanan Politeknik Negeri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/manfish.v5i1.725

Abstract

Ocean coastal waters are coastal areas that have an important role economically and environmentally, with activities such as fisheries, tourism, and sea transportation. These waters often experience sea wave phenomena which have an impact on human activities, coastal infrastructure, and marine ecosystems. This research aims to determine the characteristics of sea waves in the coastal waters of Samudera Indah, Bengkayang Regency, West Kalimantan. The data used in this study on the characteristics of ocean waves are primary data and secondary data. The data is wind data for 10 years (2012 – 2022) which comes from data from the European Center for Medium-Range Weather Forecasts (ECMWF). Forecasting and determining the characteristics of sea waves is carried out using the Sverdrup Munk Bretschneider (SMB) method which is obtained from wind data. Based on analysis of wind data from 2012 to 2022, the height and period of significant sea waves in the west season are generally greater than in other seasons, namely 0.37 meters and 2.74 seconds. On the other hand, the average height and period of significant sea waves in transition season I are lower compared to the west season, east season and transition season II.
Estimating The Distribution of Sea Water Intrusion in Sengkubang Village Based on The Resistivity Value Maulia, Nasya Putri; Muhardi, Muhardi; Perdhana, Radhitya
BERKALA SAINSTEK Vol 11 No 2 (2023)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v11i2.36686

Abstract

The fulfillment of clean water needs in Sengkubang Village is done by utilizing groundwater, which in some locations still has a brackish to salty. This situation is one indication of seawater intrusion into groundwater because Sengkubang Village is a coastal area. This study aims to estimate the distribution of seawater intrusion based on the subsurface resistivity value. The method used is the resistivity method with dipole-dipole configuration. Measurements in the field apply six lines with a length of 55 m and the smallest electrode distance of 5 m. The distance of each line from the coastline is approximately 410 m, 485 m, 560 m, 635 m, 710 m, and 785 m. The interpretation results show that the seawater intrusion at the study area has a resistivity value of 0.223 Ωm - 5.03 Ωm at a depth of 0.854 m to 10.9 m. The subsurface layer at the study site is composed of sand, sandy clay, and gravel sand mixed with silt. The unconfined aquifer layer, which is interpreted as sand, is thought to have experienced seawater intrusion to 785 m from the coastline.
PENINGKATAN PERAN PELAJAR KOTA PONTIANAK DALAM MEWUJUDKAN SEKOLAH TANGGAP BENCANA Muhardi; Satria Putra, Yoga; Ihwan, Andi; Muliadi; Sampurno, Joko; Adriat, Riza; Zulfian, Zulfian; Perdhana, Radhitya; Sutanto, Yuris; Jumarang, Muh. Ishak
GERVASI: Jurnal Pengabdian kepada Masyarakat Vol. 8 No. 2 (2024): GERVASI: Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM IKIP PGRI Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31571/gervasi.v8i2.7104

Abstract

Kota Pontianak merupakan salah satu kota di Kalimantan Barat yang memiliki risiko bencana alam, terutama banjir dan kebakaran hutan/lahan. Pelibatan pelajar dalam mewujudkan sekolah tanggap bencana di Kota Pontianak dapat meningkatkan kesadaran dan kesiapsiagaan pelajar dalam menghadapi bencana alam. Dalam rangka menjawab permasalahan tersebut, dosen di lingkungan Program Studi Geofisika, Universitas Tanjungpura telah melakukan kegiatan Pengabdian kepada Masyarakat (PkM) dengan tujuan untuk meningkatkan peran pelajar Kota Pontianak dalam mewujudkan sekolah tanggap bencana. Kegiatan PkM ini bermitra dengan salah satu sekolah di Kota Pontianak, yaitu Sekolah Menengah Atas Islam Terpadu (SMAIT) Al-Mumtaz. Kegiatan PkM dilaksanakan dalam tiga tahapan, yaitu persiapan, pelaksanaan, dan evaluasi. Berdasarkan hasil kuesioner yang diukur menggunakan skala Likert, diperoleh indeks persentase sebesar 90,48%. Hasil ini menunjukkan bahwa kegiatan PkM dinilai sangat baik oleh responden, sehingga berimplikasi pada peningkatan peran pelajar Kota Pontianak dalam mewujudkan sekolah tanggap bencana.
ANALISIS SEBARAN SEDIMEN DASAR DI PERAIRAN PESISIR PANTAI GOSONG KABUPATEN BENGKAYANG KALIMANTAN BARAT Muhardi, Muhardi; Zulfian, Zulfian; Adriat, Riza; Nurrahman, Yusuf Arief; Sofiana, Mega Sari Juane; Risko, Risko
JURNAL GEOLOGI KELAUTAN Vol 21, No 1 (2023)
Publisher : Pusat Penelitian dan Pengembangan Geologi Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/jgk.21.1.2023.820

Abstract

Perairan pesisir pantai Gosong merupakan salah satu perairan yang dimanfaatkan berbagai macam aktivitas diantaranya adalah sebagai pelabuhan perikanan, keluar masuknya kapal dan termasuk kawasan strategis dalam pengembangan kawasan pesisir. Aktivitas tersebut akan berdampak kepada proses pengendapan sedimen dasar yang mengakibatkan terjadinya pendangkalan, perubahan garis pantai dan penurunan kualitas air. Tujuan penelitian ini adalah untuk mengetahui sebaran dan jenis sedimen dasar berdasarkan analisis parameter statistik ukuran butir. Metode yang digunakan dalam penelitian ini adalah metode granulometri sedimen dan pendekatan statistik ukuran butir. Pengambilan sampel sedimen dan kecepatan arus dilakukan masing – masing sebanyak 10 titik stasiun. Sedangkan pengukuran pasang surut dilakukan selama 15 hari dengan interval waktu setiap 1 jam. Berdasarkan analisis granulometri diperoleh bahwa sebaran sedimen yang mendominasi di lokasi ini adalah lanau dengan tipe sedimen lempung berlumpur (silty clay). Hasil analisis ukuran butir dengan pendekatan statistik diperoleh nilai ukuran butir rata – rata 1,31 – 2,96 dengan klasifikasi pasir halus (fine sand) dan pasir sedang (medium sand). Untuk nilai sortasi terdapat tiga stasiun yang mempunyai klasifikasi terpilah sedang yaitu pada Stasiun 3, 6 dan 8, sedangkan pada stasiun lainnya didominasi pada klasifikasi terpilah buruk. Nilai skewness secara umum menunjukkan klasifikasi ukuran butir sedimen condong sangat halus (very fine skewed) dengan rentang nilai berkisar antara 0,63 – 2,04. Sedangkan nilai kurtosis diperoleh tiga klasifikasi ukuran butir sedimen yaitu tumpul (platycuric), cukup tumpul (mesokurtic) dan runcing (leptokurtic). Nilai kurtosis yang diperoleh memperlihatkan bahwa semakin dalam nilai kurtosis yang dihasilkan semakin kecil yaitu pada kedalaman 4,9 m nilai kurtosisnya 0,737 dan pada kedalaman 1,1 m nilai kurtosisnya 1,417.
Penggunaan Metode Geolistrik Resistivitas untuk Identifikasi Lapisan Bawah Permukaan Gunung Tujuh Kabupaten Kayong Utara Alfin Wahyudi; Azrul Azwar; Muhardi Muhardi
Jurnal Fisika Unand Vol 10 No 1 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7224.188 KB) | DOI: 10.25077/jfu.10.1.62-69.2021

Abstract

Identifikasi lapisan bawah permukaan telah dilakukan di Gunung Tujuh, Desa Sungai Paduan, Kecamatan Teluk Batang, Kabupaten Kayong Utara. Penelitian dilakukan dengan menggunakan metode geolistrik resistivitas 2D konfigurasi dipol-dipol. Pengukuran dilakukan sebanyak 4 lintasan dengan panjang masing-masing sebesar 141 meter, dan spasi antar elektroda sejauh 3 meter. Pengolahan data dilakukan dengan menggunakan perangkat lunak Res2Dinv. Hasil penelitian menunjukan bahwa sebaran nilai resistivitas bawah permukaan sekitar 59,4 Ωm hingga 14.385 Ωm. Lapisan bawah permukaan Gunung Tujuh diinterpretasi tersusun atas beberapa lapisan, yaitu lempung berpasir, pasir, kerikil, gabro, dan granit. Research related to the identification of the sub-surface layer of the earth Mount Tujuh Area, Sungai Paduan Village, Teluk Batang District, North Kayong Regency has been conducted using geoelectric resistivity method 2D dipole-dipole configuration. Measurements were carried out as many as 4 tracks with a length of 141 meters each, and space between electrodes as far as 3 meters. Data processing is done using Res2Dinv software. The results showed that the spread of sub-surface resistivity value has a value of 119 Ωm to 14,633 Ωm. The sub-surface layer of Mount Seven is interpreted in several layers, namely sandy clay, sand, gravel, gabbro, and granite.
APPLICATION OF SELF-POTENTIAL METHOD TO ESTIMATE SALTWATER DISTRIBUTION AROUND BRINE WELL IN MANIS RAYA VILLAGE, SINTANG REGENCY Rosno, Medi; Muhardi, Muhardi; Zulian, Zulian
JOURNAL ONLINE OF PHYSICS Vol. 10 No. 1 (2024): JOP (Journal Online of Physics) Vol 10 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v10i1.35192

Abstract

This research aims to estimate saltwater distribution around the  of Manis Raya Village, Sintang Regency. This research uses the self-potential method by a fixed base configuration. Measurements in the field applied eight tracks that have a length of 120 m each with a distance of 5 m for each track and 5 m for each porous spot. The distribution of saltwater around the brine well was obtained by interpolation using the kriging method. The measurement results show that the self-potential at the research location is -99.38 mV to 158.32 mV. The interpretation results show that the area of accumulated saltwater distribution is negative, located on the east, southeast, south and west sides of the . The low self-potential of saltwater is likely due to the accumulation of ions in the area. The saltwater distribution zone is suspected to be about 48 m to the southeast of the brine well.
Co-Authors . Apriansyah A.A. Ketut Agung Cahyawan W Adiltha, Fatina Adriati Adriati Ajeng Candra Indrawati Alexsianus Malujung Alfin Wahyudi Amir Machmud, Amir Andi Hairil Alimuddin Andi Ihwan Angga Irfandi Yudistira Antika, Cory Anwar, M Aprilina Aprilina Athanasius Cipta, Athanasius Azrul Azwar Desi Saputri Sri REZEKI Dilnalsyah, Felas Dita Puswari Doni, Doni Eldoni, Andika Elsa Kurnia Esau Cornelius Evi Noviani Fadjryan Fadjryan Faisal Faisal Farahdiba Helwa Latifah Faurizal Faurizal Febriyanto, Ferdy Felas Dilnalsyah Firman Saputra Fitriani Fitriani Halasan Sihombing Harsita, Sri Hasanuddin Hasanuddin Hendra Perdana Heni Susiati Heni Susiati Heni Susiati Heni Susiati Ibnur Rusi Indra Sanjaya Purba Indra Sanjaya Purba, Indra Sanjaya Irawan, Muhamad Fajar Irfana Diah Faryuni Irvan Nur Prasetya Ja'a Khairuni Jannati Jannati Jasmita Jasmita Jayawarsa, A.A. Ketut Jihan Rahmah Ramdlaniyah Joko Sampurno Joko Sampurno Joko Sampurno Jumarang, Muh Ishak Kaharudin Kaharudin Kaharudin Kaharudin, K Kanti Rahayu Kurniawati, Nur Laily Listiawati Mahmuddin Marbun Masudi Masudi Mathali'ul Anwar Mathaliul Anwar Maulia, Nasya Putri Maya Tiara Ayu Medi Rosno Mega Sari Juane Sofiana Mitranikasih Laia Muh. Ishak Jumarang Muhamad Fajar Irawan Muhammad Ghaza Eka Putra Muhammad Haykal Hafiz Azwan Muhammad Reza July Utama Muhammad Soleh Muhardi Muhardi Muliadi Muliadi Muliadi Muliadi Muliadi Muliadi Murti, Tiffany Budi Muslim Muslim Nasharuddin Nazza Kharisma Nur Hayati Nurhasanah Nurhasanah Nurhasanah Nurhasanah Nursiani, Tuti Oktavia Wulandari Oktaviana Tantri Okto Ivansyah Perdana, Radhitya Perdhana, Radhitya Pirdaus, Risky Marolop Pratiwi, Elok Surya Pratiwi, Tasya Mahardika Purnama, Desi Indah Putra, Yoga Abdul Malik Putri, Tiara Nusa Radhitya Perdhana Radhitya PERDHANA Rahmawati Rahmawati Rais, Riska Rama Destrealdi Saputra Ramat, Muhammad Farhan Randha Ayu Nurwulandari Rantika, Ika Rasmi Rasmi, Rasmi Ria Dhanisa Rifki Rionda Arsyandi Risko, Risko Riza Adriat Rizki Fajania Rosno, Medi Roso Subarkah Safrilia, Putri Salawati, Salawati Samueli Windovado Fau Sanjaya, Hartanto Saputra, Sepbriyan Rizky Satria Putra, Yoga Shaska Ramadhan Zulivandama Sihombing, Halasan Siregar, Hans Elmaury Andreas Sugianto Sugianto Suhardi Suhardi Irawan Suteja, Aji Suwiryo, Karto Syaripudin Syaripudin Tia Amanda Tisar Dewi Pratiwi Tomi Tomi Tomi, Tomi Triwerdhana, Afriadhi Tuti Nursiani Ulfa, Marsita Urai Suci Yulies Vitri Indrawati Wahyu Nur Aqni Wahyudi Wahyudi Wahyudi Wahyudi Widodo Widodo Yoga Satria Putra Yoga Satria Putra Yoga Satria PUTRA Yudha Arman Yudhi Yundari, Yundari Yupensius Febi Ariputra Yuris Sutanto Yuris Sutanto Yusanneya Geulis Yusuf Arief Nurrahman Zibar, Zan Zulfian Zulfian Zulian, Zulian Zulkifli, Reynaldi