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All Journal SEMIRATA 2015 JGE (Jurnal Geofisika Eksplorasi) JOURNAL ONLINE OF PHYSICS Jurnal Geocelebes Science and Physics Education Journal (SPEJ) JOURNAL OF SCIENCE AND SOCIAL RESEARCH Seminar Nasional Lahan Suboptimal Indonesian Physical Review Jurnal Geofisika Berkala Arkeologi
ira kusuma dewi
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Agriculture, Biological Sciences & Forestry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Physics Social Sciences Other

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Journal : JOURNAL ONLINE OF PHYSICS

 1 
APLIKASI GEOLISTRIK KONFIGURASI WENNER DALAM MENDETEKSI PENCEMARAN AIR TANAH AKIBAT GAMBUT PADA DESA SUNGAI TERAP ira kusuma dewi; Nasri MZ; Ichy Lucya Resta; Juventa
JOURNAL ONLINE OF PHYSICS Vol. 6 No. 1 (2020): JOP (Journal Online of Physics) Vol 6 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v6i1.10633

Abstract

Sungai Terap Village, Betara District, Tanjung Jabung Timur Regency is one of the areas in Jambi Province which is composed of peat soil. Peat land in this village is used by the community as agricultural and plantation land. As a result, the peat soil is degraded and damaged, causing groundwater pollution. The application of the resistivity geoelectric method can answer the question of groundwater pollution. In the current method that is injected into the earth and measures the potential difference on the surface. Geoelectric measurements were carried out in 4 lines with a length of 200 meters, electrode separation of 10 meters and n = 4. From the measurement results, it was found that groundwater was polluted due to peat soil because it had a very small resistivity value, namely 0.625-2.064 Ωm. This is because the chemical content contained in the peat soil will be carried away by rainwater that enters the surface. The effect of sea water intrusion can also pollute groundwater through drainage channels built on the peatlands.
PENYELIDIKAN AKUIFER BERDASARKAN NILAI RESISTIVITAS DI KAWASAN GAMBUT MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DESA JATI MULYO Vidya Kusuma Wardani S; Ngatijo Ngatijo; Ira Kusuma Dewi
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.16592

Abstract

Telah dilakukan penelitian dengan menggunakan metode geolistrik konfigurasi Schlumberger yang bertujuan untuk mengetahui keberadaan akuifer baik dari segi kedalaman maupun ketebalan akuifer di Desa Jati Mulyo Kecamatan Dendang Kabupaten Tanjung Jabung Timur, Provinsi Jambi. Pengukuran di lapangan sebanyak 15 titik sounding dengan masing-masing panjang lintasan 400 m, diperoleh jenis batuan dan nilai resistivitas dari hasil pengolahan melalui software IPI2Win sebagai berikut, yaitu top soil dengan nilai resistivitas 20 Ωm sampai 200 Ωm, lempung dengan nilai resistivitas berkisar antara 1 Ωm sampai 15 Ωm, kemudian lempung pasiran yang memiliki nilai resistivitas berkisar antara 15 Ωm sampai 29 Ωm, selanjutnya untuk pasir dengan nilai resistivitas berkisar antara 29 Ωm sampai 100 Ωm, dan kerikil dengan nilai resistivitas besar dari 100 Ωm. Lapisan pasir dan kerikil disini diduga sebagai lapisan yang membawa air (akuifer) secara baik, dikarenakan memiliki nilai porositas dan permeabilitas yang cukup tinggi. Berdasarkan hasil pemodelan 2D yang telah diolah menggunakan software RockWork 15, lapisan yang berpotensi sebagai akuifer berada pada kedalaman 20 m sampai 50 m. Dimana pola akuifer semakin mendalam dan menebal kearah timur laut. Selain itu akuifer juga berada pada kedalaman 75 m sampai 100 m di Barat Daya pemukiman Desa Jati Mulyo. Sehingga untuk ketebalan akuifer di Desa Jati Mulyo berkisar antara 25 m sampai 30 m. Kata kunci : Akuifer; Resistivitas; Schlumberger
PEMODELAN 2D DATA GROUND PENETRATING RADAR (GPR) PADA LAHAN GAMBUT DI DESA JATI MULYO Ira Kusuma Dewi, S.Si.,M.T; Riadi Adriansyah
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.28602

Abstract

Research has been conducted using the ground penetrating radar (GPR) method which aims to determine subsurface lithology on peatlands in Jati Mulyo Village based on 2D modeling. The GPR method is one of the geophysical methods that applies electromagnetic wave propagation. GPR data measurements were carried out as many as 3 passes with each length of 200 meters. The result of the GPR measurement is a 2D model that describes subsurface lithology. The response of this 2D model is in the form of a distribution of color variations starting from yellow-red, green, light blue -dark blue. The yellow-orange color response indicates the presence of minerals found on peatlands. The green response describes the soil below the surface. While the blue response indicates a cavity filled with water. This is appropriate based on the geology of this peatland is a sedimentary deposit that has pores filled with water and the presence of mineral content contained in the peat soil.   
ANALISIS KERENTANAN TANAH FAKULTAS SAINS DAN TEKNOLOGI UNIVERSITAS JAMBI DENGAN MENGGUNAKAN DATA MIKROTREMOR Ira Kusuma Dewi; Ichy Lucya Resta; Sarwo Sucitra Amin; Nuklirullah Nuklirullah; Juventa Juventa; Salomo Situmorang; Amelia Fitri Ramadhani
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Research has been carried out to carry out soil vulnerability analysis at the Faculty of Science and Technology, Jambi University. The construction of buildings at the Faculty of Science and Technology has necessitated an analysis of the vulnerability of the land around the buildings at the Faculty of Science and Technology. Based on the regional geology in this area, the Muara Enim formation (TMPM) is formed in the Tertiary age which is composed of rocks from interbedded tuffaced sandstones with tuffaced mudstones, interbedded quartz sandstones with quartz mudstones, interbedded with coal and iron oxide. The rocks formed in this formation are a type of sedimentary rock. To carry out soil vulnerability analysis, the HVSR method is applied to measure microtremors. Microtremors are a geophysical method that uses very small and continuous ground vibrations. This HVSR method is a passive seismic method using three components, namely 2 horizontal components and 1 vertical component. Microtremor measurements on the ground were carried out at 6 points around the building. The results obtained from microtremor measurements using the HVSR method are the natural frequency (f0), amplification factor (A0) and Seismic Vulnerability Index (Kg). The natural frequency (f0) value ranges from 1.30-1.82 Hz, the amplification factor (A0) value ranges from 1.69 - 3.28 times and the seismic vulnerability index (kg) value ranges from 1.814167 to 5.948834 x 10^-6 s^2/cm. Based on the Kanai classification, a frequency value < 2.5 HZ includes soil type IV and soil type II with Alluvial Rock lithology formed from delta sedimentation, top soil, mud. With a depth of 30 meters or more. This area has a very thick surface sediment, more than 30 meters. Based on the classification according to Setiawan, the amlification factor is classified as low (A0<3) to medium (3<A0<6). A low to moderate amplification factor indicates that the rock that makes it up is compact/hard. Based on the Refrizon Classification, the Seismic Vulnerability Index value is in the low (kg<3) to medium (3<kg<6) category. The seismic vulnerability index is low to medium, meaning that if a shock occurs there will be no damage because the vulnerability value is medium - low. Based on these three parameters, it can be concluded that the land around the FST building is still classified as safe from shocks.
IDENTIFIKASI ZONA LEMAH DENGAN METODE GEOLISTRIK KONFIGURASI WENNER DI KELURAHAN TERUSAN KECAMATAN MARO SEBO ILIR KABUPATEN BATANGHARI Riadi Adriansyah; Lenny Marlinda; Ira Kusuma Dewi
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 2 (2024): JOP (Journal Online of Physics) Vol 9 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i2.25051

Abstract

Wiayah Kabupaten Batanghari sebagian besar berada pada Daerah Aliran Sungai (DAS) sungai Batanghari. Kelurahan Terusan merupakan salah satu desa di Kecamatan Maro Sebo Ilir, Kabupaten Batanghari, Jambi yang terletak di sepanjang aliran sungai Batanghari tersebut. Keberadaan infrastruktur pada Kelurahan Terusan banyak yang terdapat di sepanjang aliran, sehingga menyebabkan pembebanan terhadap kondisi bawah permukaan yang tersusun oleh litologi sedimen-sedimen lepas yang saling menyisip pada lapisan diatas maupun dibawahnya. Hal tersebut menyebabkan berkurangnya daya dukung tanah dan berakibat terbentuknya zona lemah. Penelitian ini bertujuan untuk mengetahui struktur bawah permukaan serta mengidentifikasi lokasi zona lemah daerah penelitian. Akuisisi data dalam mengidentifikasi zona lemah menggunakan metode geolistrik konfigurasi wenner sebanyak 3 lintasan. Hasil penelitian berdasarkan pengolahan menggunakan software Res2dinv, berupa penampang 2D bawah permukaan. Hasil penelitian diperoleh litologi penyusun bawah permukaan terdiri dari endapan pasirhalus, lanaupasiran serta kerikil. Keberadaan lokasi zona lemah tersebar pada setiap lintasan. Berdasarkan hasil penampnag 2D bawah permukaan zona lemah terdapat pada nilai resistivitas 4,06-17,04 Ωm, yang didominasi oleh pasirhalus. Kata Kunci: Geolistrik, Konfigurasi Wenner, Zona Lemah, Amblesan
SURVEI SEBARAN POTENSI AQUIFER MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCLUMBERGER DI DESA BUNGKU KECAMATAN BAJUBANG KABUPATEN BATANGHARI Irfan perastya Dinata; Januardi Januardi; Dian Nursafitri; Taufik Akbar; Ahmad Farhan Fatoni; Jason Arliano Satya Ongko; Ira Kusuma Dewi; Sarwo Sucitra Amin
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 3 (2024): JOP (Journal Online of Physics) Vol 9 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i3.34060

Abstract

Di Desa Bungku sulit mendapatkan sumber air bersih untuk kelangsungan aktivitas masyarakat di desa yang menggunakan air permukaan (sungai), namun ketika musim kemarau tiba, air sungai mengering sehingga tidak mampu menyediakan air bersih. cadangan air. Tak hanya kuantitas, kualitas air juga mengalami perubahan. Kualitas air dilaporkan telah menurun secara signifikan selama dekade terakhir. Di Desa Bungku juga banyak terdapat ladang minyak, salah satunya adalah ladang minyak milik Pertamina. Keberadaan ladang minyak ini sedikit banyak berdampak pada kualitas air tanah, salah satunya air yang berasal dari sumur warga berbau dan berminyak. Menggunakan metode geolistrik dengan konfigurasi Schlumberger. Berdasarkan hasil interpretasi daerah penelitian, lapisan akuifer yang teridentifikasi pada lapisan batupasir berada pada kedalaman 56,8 m – 101 m. Litologi daerah penelitian terdiri atas tanah pucuk, batulempung, batulempung berpasir, batulanau, dan batupasir. Lapisan akuifer terdapat pada lapisan batupasir, dengan kedalaman 56,8 m – 101m dengan tipe akuifer semi tertekan. Pengukuran dilakukan di sepanjang pemukiman masyarakat Desa Bungku dengan sebaran akuifer relatif sama, yaitu pola akuifer semakin menipis dari timur ke barat.Top of Form  
Co-Authors -, Maison Adree Octova Agustyadi Martha Ahmad Farhan Fatoni Ahmat Munawir Siregar Amelia Fitri Ramadhani Andy Chandra Azhar Aziz, Azhar Dharma, Dwiky Surya Dian Nursafitri Erna Yustika Hutasoit Faizar Farid Fitria Puspitasari Hanafi, Ridwan Hasmayni, Babby Irfan perastya Dinata Irsyad Leihitu Iwilja Nanda Risa Januardi Januardi Jason Arliano Satya Ongko Juventa, Juventa Lenny Marlinda Lenny Marlinda Mashendra, Kiki Maulindra, Yanda Nasri M Z Nasri MZ Ngatijo Ngatijo Ngatijo Ngatijo Ngatijo Ngatijo Novianda, Cici Nuklirullah Nuklirullah Putri, Sanita Resta, Ichy Lucya Revaldo Sepriyenra Riadi Adriansyah Rifqi Muhammad Salomo Situmorang Sarwo Sucitra Amin Taufik Akbar Tri Utami Vemileza Putri Vidya Kusuma Wardani S Y Yatini