Article Per Year (5 Year)
p-Index From 2020 - 2025
3.143
P-Index
This Author published in this journals
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
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Physics Social Sciences Other

Published : 19 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 19 Documents
Search

 1   2 
ESTIMASI KETEBALAN STRUKTUR BATUAN DI TIKU BAGIAN UTARA KECAMATAN TANJUNG MUTIARA KABUPATEN AGAM MENGGUNAKAN METODE GEOLISTRIK TAHANAN JENIS KONFIGURASI DIPOLE-DIPOLE Dewi, Ira Kusuma; Octova, Adree; Akmam, Akmam
SEMIRATA 2015 Prosiding Bidang Fisika
Publisher : SEMIRATA 2015

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (683.616 KB)

Abstract

Tiku Tanjung Mutiara Agam terletak pada 0.03o LS dan 100.22o BT. Berdasarkan peta geologi di daerah Kabupaten Agam (S.Gafoer, 1996), secara umum struktur geologi pada daerah tersebut adalah endapan alluvial yang terdiri dari lanau, pasir dan kerikil. Peta geologi tersebut tidak menjelaskan secara jelas struktur geologi untuk masing-masing wilayah. Oleh karena itu, peneliti melakukan penelitian untuk mengetahui struktur lapisan batuan di daerah tersebut. Penelitian ini dilakukan menggunakan metode geolistrik tahanan jenis konfigurasi Dipole-dipole untuk mengetahui ketebalan dari masing-masing struktur lapisan tersebut. Metode geolistrik merupakan salah satu metode geofisika yang mempelajari struktur lapisan bawah permukaan berdasarkan sifat kelistrikan suatu medium. Arus diinjeksikan ke dalam bumi melalui elektroda arus dan beda potensial yang dihasilkan diukur melalui elektroda potensial. Pengukuran yang dilakukan sebanyak 2 lintasan terdiri dari 5 titik sounding. Data yang diperoleh dari pengukuran berupa nilai tahanan jenis semu dan AB/2 diolah menggunakan software Ipi2win sehingga diperoleh nilai tahanan jenis dan ketebalan perlapisan batuan yang terdapat di bawah titik sounding. Hasilnya adalah  bahwa jenis batuan yang membentuk struktur geologi pada daerah tersebut adalah pasir besi, alluvial, basalt, campuran aluvial dengan pasir besi dan pasir kerikil bercampur lanau. Ketebalan dari struktur batuan bervariasi dari  2,23 m sampai 70,3 m. Katakunci : Struktur geologi, Konfigurasi Dipole-dipole, metode Geolistrik, Ipi2win
3D DATA GRAVITY MODELING FOR IDENTIFICATION OF THE FORMATION STRUCTURE OF THE HYDROCARBON BASIN IN THE BAJUBANG REGION, JAMBI PROVINCE Ira Kusuma Dewi; Fitria Puspitasari; Nasri M Z; Agustyadi Martha
Jurnal Geofisika Eksplorasi Vol 6, No 3 (2020)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v6i3.103

Abstract

Jambi is an area that has natural resources in the form of petroleum, one of which is the Bajubang region. Bajubang is located in the Jambi Sub Basin where ripe hydrocarbons are visible in the Talang Akar Formation. Petroleum exploration continues to run out of oil reserves. To find the presence of a sedimentary basin that has stopped, it can be done by measuring the gravity method. The basic concept of this method is to measure the geographical variation of an area on the earth's surface and corrected through the prevailing measurements or prices. The purpose of this research is to determine the geological structure pattern that causes the formation of sub-basins that indicate the presence of hydrocarbons and describe the subsurface conditions using forward modeling and backward modeling. Based on the modeling results found as many as 7 sub basins sediment. The height and fault structures are identified in the subsurface model. Based on the regional anomaly map shows the presence between the basin and the elevation. The fault structure, anticline and sub-basins are found which are expected to produce hydrocarbons.
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.
Identifikasi Percepatan Tanah Maksimum dan Intensitas Gempa Bumi di Sumatra Barat Menggunakan Metode Gutenberg-Richter Erna Yustika Hutasoit; Ira Kusuma Dewi; Faizar Farid
JURNAL GEOCELEBES Vol. 5 No. 2: October 2021
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/geocelebes.v5i2.14056

Abstract

Sumatra Barat memiliki tingkat kegempaan cukup tinggi karena berada pada zona Megathrust, Sesar Mentawai, dan Sesar Sumatra. Tingginya tingkat kegempaan ini mempengaruhi nilai percepatan tanah di Sumatra Barat yang merupakan parameter penting dalam perencanaan bangunan tahan gempa. Metode Gutenberg-Richter merupakan salah satu metode empiris untuk menghitung nilai percepatan tanah maksimum (PGA) dan intensitas gempa bumi berdasarkan magnitudo gempa. Data penelitian ialah data katalog gempa bumi dari BMKG dan USGS dengan periode 01 Januari 2005 hingga 15 September 2020 dengan magnitudo gempa Mb ≥3 dan kedalaman ≤70 km. Berdasarkan data BMKG diperoleh gempa bumi sebanyak 1136 kejadian dan menunjukkan nilai PGA di Sumatra Barat sekitar 0,16 – 1,44 m/s2 dengan intensitas V–VIII MMI serta episenter menyebar di zona akresi, zona Sesar Sumatra dan zona Sesar Mentawai. Sedangkan dari USGS diperoleh gempa bumi sebanyak 1140 kejadian dan menunjukkan nilai 0,28 – 1,35 m/s2 dengan intensitas VI–VIII MMI serta episenter yang menyebar di zona Sesar Mentawai. Berdasarkan analisis data baik dari BMKG maupun USGS diperoleh bahwa Kabupaten Kepulauan Mentawai adalah wilayah yang memiliki tingkat risiko gempa bumi paling tinggi dan berpotensi tsunami dengan nilai percepatan tanah maksimum sekitar 1,29 – 1,44 m/s2 dengan intensitas VIII MMI.
Identification of Peat Land Pollution in Sungai Terap Village Using Wenner Configuration Geoelectric Method Ira Kusuma Dewi; Nasri MZ; Ichy Lucya Resta; Juventa Juventa
xxxx-xxxx
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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

Abstract

Dewi IK, MZ Nasri, Resta IL, Juventa J.2020. Identification of Peat Land Pollution in Sungai Terap Village Using Wenner Configuration Geoelectric Method. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-8 Tahun 2020, Palembang  20 Oktober 2020. pp. xxx.  Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI). Groundwater pollution arising from the conversion of functions on peatlands in Sungai Terap Village. To identify the ground air pollution, the geoelectric method of research using Wenner was carried out. This research was conducted in 4 tracks with a length of 200 meters and the distance between the electrodes was 10 meters with 4 times the electrode spacing. The results of this study are 2D subsurface models in the form of apparent resistivity from the inversion results. The resistivity value generated in the 2D model ranges from 0.381-19 Ωm. The water content at the research location with a very small resistance value between 0.4-1.25 Ωm. The presence of groundwater is estimated to be trapped in the alluvium layer at a depth of 7.75-19.4 meters. The groundwater is thought to have been polluted because it has a resistivity value <10 Ωm. Almost every measurement path is found in polluted air due to rainfall and sea water intrusion.
Identifikasi Batuan Granit Daerah Prospek Panas Bumi Nyelanding menggunakan Metode Magnetik Ahmat Munawir Siregar; Ira Kusuma Dewi; Ngatijo Ngatijo
SPEJ (Science and Physic Education Journal) Vol 4 No 2 (2021): SPEJ (Science and Physic Education Journal)
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/spej.v4i2.2388

Abstract

This study aimed to identify granite rocks around the Nyelanding geothermal area, especially in the geothermal manifestations. This research used the magnetic method to analyze the subsurface structure of the geothermal area. Correction of magnetic data was performed in Microsoft excel 2010 software and two-dimensional modeling was performed using Oasis Montaj 8.4. The results showed that there are three layers of rock under Nyelanding hot springs, namely granite with a susceptibility of 0.009 - 0.05 SI to a depth of 500 meters and a layer of sandstone - clay, as well as layers of clay, gravel and silt with a susceptibility of 0.00001 - 0, 00005 SI. In conclusion, the local geology of the Nyelanding hot spring area is dominated by the presence of granite to a depth of 500 meters. The results of forward modeling on layers A-A' and C-C' show the subsurface structure of Nyelanding hot springs in the form of a granite rock basin which is estimated to be able to accumulate geothermal energy. Key words: Nonvolcanic Geothermal, Magnetic Method, Granite Susceptibility, Forward Modeling
Penentuan Zonasi Bencana Tsunami di Kabupaten dan Kota Pesisir Provinsi Sumatera Barat Tri Utami Vemileza Putri; Ira Kusuma Dewi; Lenny Marlinda
SPEJ (Science and Physic Education Journal) Vol 5 No 2 (2022): SPEJ (Science and Physic Education Journal)
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/spej.v5i2.3237

Abstract

Abstract: The purpose of this study was to determine how the tsunami disaster zoning in the Regency and Coastal City of West Sumatra Province was determined. The survey results show that geographically the regencies and cities on the coast of West Sumatra are around the threat of a tsunami, in addition to economic activities, government activities, and high population density around the coastal area. Regencies and cities located on the coast of West Sumatra, including West Pasaman Regency, Agam Regency, Padang Pariaman Regency, Pariaman City, Padang City, Pesisir Selatan Regency, and the Mentawai Islands, are feared to be the following places to be hit by a tsunami, for this reason, efforts are needed - efforts to overcome the tsunami hazard. In conclusion, the tsunami risk zone in the province of West Sumatra, which is very dangerous, is in the Mentawai archipelago with a wave height of 20-35 m and a wave arrival time of 10-20 minutes with a warning level of alert. And the story of tsunami disaster risk in coastal districts and cities of West Sumatra province is divided into four zones, namely: Not dangerous, Less dangerous, namely West Pasaman district, the danger is Agam district, Pariaman city, Padang Pariaman district, Padang city, and Pesisir Selatan district, Very dangerous namely the Mentawai Islands. Keywords: ArcGis 10.3, Comcot, Tsunami
ANALISIS KERENTANAN TANAH BERDASARKAN PENGUKURAN MIKROTREMOR DI DESA JATI MULYO, TANJUNG JABUNG TIMUR Iwilja Nanda Risa; Maison Maison; Ira Kusuma Dewi
JGE (Jurnal Geofisika Eksplorasi) Vol 9, No 1 (2023)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v9i1.236

Abstract

Desa Jati Mulyo berada di Kecamatan Dendang Kabupaten Tanjung Jabung Timur yang didominasi oleh gambut sehingga rentan terhadap penurunan muka tanah. Penelitian ini bertujuan untuk mengetahui tingkat kerentanan tanah serta distribusi nilai parameter mikrotremor. Pengukuran dilakukan menggunakan seismograf MAE A6000S sebanyak 36 titik yang tersebar di Desa Jati Mulyo. Analisis data mikrotremor menggunakan metode HVSR (Horizontal to Vertical Spectral Ratio) dengan menggunakan perangkat lunak Geopsy menghasilkan nilai parameter frekuensi alami (f0) dan amplifikasi (A0), selanjutnya perhitungan dilakukan untuk menentukan nilai indeks kerentanan seismik (Kg). Hasil penelitian menunjukkan rentang nilai frekuensi natural area penelitian berkisar antara 0,57 Hz hingga 9,12 Hz. Kemudian nilai faktor amplifikasi berada diantara rentang 1,87 hingga 7,54 dan nilai indeks kerentanan sesimik berada diantara rentang 0,80 hingga 33,44. Berdasarkan Hasil Penelitian, terdapat 3 zona kerentanan seismik pada daerah penelitian, yaitu zona rendah, zona sedang dan zona tinggi. Daerah penelitian di dominasi oleh zona tinggi yang mana hampir seluruhnya tersebar di kawasan penelitian. Hal ini dikarenakan wilayah penelitian merupakan endapan aluvial yang tertutup lahan gambut, maka terdapat bahaya penurunan muka tanah yang tinggi dan dan berpotensi terjadi kerusakan akibat gempabumi.
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.   
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