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All Journal Indonesian Journal of Geography JOURNAL ONLINE OF PHYSICS INDONESIAN JOURNAL OF APPLIED PHYSICS Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) Jurnal Sisfokom (Sistem Informasi dan Komputer) SEMAR Prosiding University Research Colloquium Indonesian Journal of Environment and Disaster
Koesuma, Sorja
Department of Physics, Sebelas Maret University
Humanities Astronomy Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences

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Analisis Karakteristik Sumur Bor Sebagai Sumber Air Tanah pada Daerah Batu Karang dan Tandus Simpen, I Nengah; Indriana, Rina Dwi; Koesuma, Sorja
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 11, No 1 (2021): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v11i1.47532

Abstract

Telah dilakukan penelitian tentang analisis karakteristik sumur bor. Penelitian ini merupakan suatu contoh penelitian tentang analisis karakteristik sumur bor di daerah batu karang dan tandus. Penelitian mengambil contoh di sumur RSPTN Universitas Udayana berlokasi di Jimbaran Badung Bali. Analisis yang dilakukan efisiensi sumur (Ew), faktor pengembangan sumur (Fd), perbaikan sumur (C) dan debit optimum (Qopt). Hasil penelitian didapatkan bahwa berdasarkan hasil pengukuran geolistrik, pada sumur bor memang ada akuifer. Sumur yang dibikin termasuk sumur yang efesien dengan tingkat efisiensi   84,71%. Ini berarti sangat efesien untuk pengambilan air. Sumur memiliki faktor pengembang 0,077864 hari/m3 Ini berarti sumur sangat baik untuk dikembangkan. Nilai C = 28994,2. Ini berarti apabila sumurnya ada kendala misalnya debitnya mengecil, maka sumur sulit dikembalikan menjadi seperti semula. Kapasitas jenis (Sc) rata-rata didapat: 0,0196908 m2/s, nilai ini lebih besar dari 0,005.  Ini berarti sumur memiliki produktifitas tinggi. Debit optimum (Qopt) = 0,00782 m3/s = 28,152 m3/jam. Drowdown optimum (Swopt) = 2,17 m. Nampak bahwa adanya keterbatasan kuantitas cadangan air. Uji sumur dengan debit konstan (0,00328 m3/s) telah dilakukan selama 7,5 jam ini berarti air sumur telah diambil 88,56 m3, tetapi sumur hanya mengalami penurunan permukaan air sebesar 22,2 cm secara konstan.
Analisa Sea Level Rise Dari Data Satelit Altimetri Topex/Poseidon, Jason-1 Dan Jason-2 Di Perairan Laut Pulau Jawa Periode 2000 – 2010 Wuriatmo, Hastho; Koesuma, Sorja; Yunianto, Mohtar
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 2, No 02 (2012): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v2i02.1296

Abstract

It has been conducted a research about sea level rise (SLR) in surrounding Jawa island by using satellite altimetry data Topex/Poseidon, Jason-1 dan Jason-2 for period 2000 – 2010. Satellite altimetry is satellite which specially design for measuring dynamics of sea water. Those satellite lauched firstly in 1992 incorporation between National Aeronautics and Space Administration (NASA) dan European Space Agency (ESA). There are six locations for measuring SLR i.e. Jakarta, Semarang, Surabaya, Pangandaran, Jogjakarta dan Prigi. We choselocations based on alongtrack of satellite and near the big cities in Jawa island with dimension area around 0.5ox0.5o degrees. We found SLR rate for Jakarta (2.5 ± 0.24 mm/yr), Semarang (2.16 ± 0.20 mm/yr), Surabaya (2.72 ± 0.19 mm/yr), Pangandaran (0.71 ± 0.33 mm/yr), Jogjakarta (0.91 ± 0.38 mm/yr) and Prigi (1.3 ± 0.38 mm/yr). The average SLR rate for North coast is (2.46 ± 0.21 mm/yr) and for South coast (0.97 ± 0.36 mm/yr). This results are wellcorrelated with data from tide gauge stations.
Utilization of Satellite Gravimetric Data to Estimate the Location of the Magma Chamber of Slamet Volcano, Central Java, Indonesia Sehah, Sehah; Koesuma, Sorja; Prabowo, Urip Nur Wijayanto; Ikhwana, Aina Zahra
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 13, No 2 (2023): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v13i2.73923

Abstract

Satellite gravimetric data can be utilized to map the gravity anomaly on the earth's surface, especially for difficult, extreme, and large areas. In this study, satellite gravimetric data has been used to estimate the location of the magma chamber of Slamet volcano, Indonesia. Information on the magma chamber is very useful for knowing the volcanic characteristics and activity, thus helping pre-mitigation efforts to catastrophic eruptions that occur. The stages in the study which have been carried out include data access, correction, reduction, modeling, and interpretation. The satellite gravimetric data that has been accessed is GGMplus data. After several corrections and reductions are done, the complete Bouguer anomalies (CBA) data are obtained with values ranging from 11.889 – 117.429 mGal. Filtering process using the upward continuation has been applied to obtain regional anomalies data. The regional anomalies data are corrected to the CBA data, so that the residual gravity anomalies data are obtained. The lowest gravity anomaly value is located at positions of 109.21967 E and 7.24281 S which is interpreted to be the location of the magma chamber of Slamet Volcano that is currently still active. The result of modeling of the residual gravity anomalies data indicate that the position of the magma chamber of Slamet Volcano is estimated to be relatively under the cone with a density lower than the surrounding rock densities, i.e. 1.50 – 1.75 g/cm3. The study results have a good match with the geological map of the study area.
Identifikasi Pola Aliran Sungai Bawah Tanah Daerah Karst di Desa Gebangharjo Kecamatan Pracimantoro Menggunakan Metode Tomography Resistivity Konfigurasi Wenner-Schlumberger Purwanto, Yudi; Darsono, Darsono; Koesuma, Sorja
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i2.12766

Abstract

This research is conducted using 4 lines data with 750 meters in length. Tomography resistivity with Wenner-Schlumberger configuration is used as this research methodology to take the data with a = 50 meters and n=1, 2, 3, 4, 5, 6. Resistivitymeter OYO 2119C McOHM-ELmodel is used as the instrument. Furthermore, the data is processed with two softwares; Res2Dinv ver. 3.56.22 to get 2D resistivity section and RockWork16to make 3D model of the site. The underground river’s chamber is made by hollow carbonate rocks with the resistivity of >412 Ωmand 117,6 Ωm – 412 Ωm for limestone’s resistivity as its capsrock. Researching to the depth of 173 meters, underground rivers are shown in the line 2 in the depth of 65 to 134 meters, 65 to 173 meters in the line 3, and in the cross section of line 3 and line 4. While in the first trajectory, another chamber is found within the depth of 12.5 to 40 meters. It is expected that the underground river is flowing to the south because of the chamber in third and fourth trajectory are lower than second trajectory.
Analysis of Earthquake Vulnerability of The Demak Coastal Area based on the HVSR (Horizontal To Vertical Spectral Ratio) Method Nurwidyanto, Muhammad Irham; Harmoko, Udi; Gernowo, Rahmat; Fernando, Gregrius Alvin; Koesuma, Sorja
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 14, No 2 (2024): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v14i2.90703

Abstract

Most of the Demak Coastal area, especially on the north coast, has a subsurface structure which is quite thick sediment. The impact of an earthquake will cause damage to subsurface structures and buildings above it, so a method is needed that can determine earthquake vulnerability in an area to take mitigation steps. This research aims to analyze vulnerability to earthquakes based on natural frequency (fo), amplification (Ao) and seismic vulnerability index (SVI). The research was carried out by measuring the microseismic signal response at 89 locations using a 3-component seismograph and data logger. The research results showed that the dominant frequency varied from 0.26 – 5.26 Hz, the amplification factor varied from 0.51 – 3.56 and the seismic susceptibility index varied from 0.14-14.77 micro cm2/s. The study area was classified into low SVI (SVI < 5), medium SVI (5 < SVI < 10), and high SVI (SVI > 10).  The potential earthquake hazard described by SVI with a value range of 10 < SVI (high classification) is found at observation station 60 (Bedono Hamlet) and observation station 70 (Karangwaru Hamlet Cemetery)
Earthquake Disaster Risk Assessment in Purworejo District, Central Java Province, Indonesia Muryani, Chatarina; Koesuma, Sorja; Wijayanti, Pipit
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 14, No 1 (2024): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v14i1.76180

Abstract

Purworejo Regency is directly adjacent to the Indian Ocean and is close to the Java subduction, so it is estimated to have a high earthquake risk index. This study aims to analyze the earthquake disaster risk in Purworejo District, Central Java Province, Indonesia. Earthquake risk analysis methods follow Perka BNPB No 02 of 2012, including hazard, vulnerability, and capacity analysis. The disaster risk index combines the disaster, vulnerability, and capacity indexes. The findings of this study reveal the following: (1) 295 villages within Purworejo Regency fall into the high earthquake hazard category, primarily located in the southern region of Purworejo or near the Java subduction zone. (2) The high vulnerability to earthquakes is widespread across almost all villages in Purworejo Regency. The highest concentration of villages with a high vulnerability index is found in Ngombol District (57 villages), Butuh District (41 villages), and Purwodadi District (40 villages). (3) Purworejo Regency exhibits a capacity to cope with earthquakes that are not categorized as low. The majority, comprising 464 villages (93.92%), falls within the middle class, while 30 villages (6.08%) are classified as having a high capacity. (4) Within Purworejo Regency, 117 villages (23.7%) are at a high risk of earthquakes, and 376 villages face a moderate risk. Only one village has a low disaster risk index.
Identification of Subsurface Structures of Geothermal Potential Area in East of Mount Lawu Using The Gravity Method Koesuma, Sorja; Septianingsih, Mela Budiani; Legowo, Budi
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 10, No 01 (2020): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (439.376 KB) | DOI: 10.13057/ijap.v10i01.34217

Abstract

Information about the eastern side subsurface stones of Mount Lawu regarding geothermal potential is limited. This research was conducted to provide information regarding geothermal potential in those area by using the gravity method. We did a 18 sites of gravity surveys in eastern flank of Mount Lawu where located in Magetan regency, Ngawi regency and Sragen regency, East Java. The principle of this method is to measure the earth's gravity field, then the value of gravity is corrected by some gravity corrections, i.e. height, tide, drift, normal gravity, free-air, Bouguer and terrain corrections. The Complete Bouguer Anomaly (CBA) shows the formation that related to the rock formation in the subsurface of Mount Lawu. Based on CBA modelling we found that in the eastern flank of Mount Lawu contains of tuff and breccia of volcanic rocks, breccia Jabolarangan and tuff Jabolarangan, lava andesite, igneous rock (pumice), and sedimentary rocks in the form of sandstone and clay. We found a fault structure on six tracks of a research area. Otherwise, we estimated that there is a geothermal potential on the southeast side of the research area
Analysis of Land Use Land Cover and Land Surface Temperature in Karst Area: A Case Study Wonogiri Regency Noviani, Rita; Saputra, Aditya Eka; Wijayanti, Pipit; Koesuma, Sorja
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 14, No 1 (2024): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v14i1.79048

Abstract

Urban development and global climate change drive increased Land Surface Temperature (LST). Wonogiri Regency is an area that is within the development range of Surakarta City. Analysis of land surface temperature has become Important in Wonogiri Regency as a mitigation measure for urban heat islands. This study aims to measure Land Surface Temperature (LST) in Wonogiri Regency and determine the controlling factor in the form of Land Use Land Cover (LULC), Normalized Difference Vegetation Index (NDVI), seasons, and zones by landform. Using the Google Earth Engine platform, LST calculations, LULC classifications, and NDVI calculations can compute imagery. The dataset used is USGS Landsat 8. The analytical technique used in this study is comparative descriptive, which compares other controlling factors. The analysis results show the vital role of LULC, NDVI, seasonality, and landform on LST. LULC types of built-up land, low NDVI values, dry season, and southern zone (karst) tend to have higher LST than other factors.
3D Inversion of Gravity Data Modeling Using The Chi Fact Algorithm for Revealing Subsurface Structure in Semarang City Indriana, Rina Dwi; Adhi, Mochamad Aryono; Tampubolon, Danastri L. P.; Koesuma, Sorja
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.59295

Abstract

The interpretation of subsurface in the Semarang City with 3D inversion model using the Chi Fact algorithm has been carried out to reveal the subsurface especially related to the presence of groundwater basins. The gravity data model in this research uses 80 stations with a research area of 20 km2 which is specialized in the surrounding area of Kaligarang district. The results of the 3D inversion using the Chi Fact algorithm founded the distribution of subsurface rock density values in the Semarang City area ranging from 1.6 gr/cc to 2.98 gr/cc. The distribution of subsurface density values indicates the subsurface geological structure of the Semarang City area had a normal fault leading to the southeast.
Gravity Interpretation of Mud Volcano based on Satellite Data (Study Case Kuwu and Cangkring Mud Volcano) Indriana, Rina Dwi; Mariyanto, Mariyanto; Agustin, Eleonora; Iryanti, Mimin; Hapsoro, Cahyo Aji; Koesuma, Sorja; Ashadi, Abdul Latif
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 14, No 1 (2024): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v14i1.84933

Abstract

A mud volcano is one type of mountain in the world. Mud volcano has specific characteristics. In Java, several mud volcanoes spread from west to east of Java. Bledug Kuwu and Bledug Cangkring are mud volcanoes in Central Java. Research on the Bledug Kuwu and Cangkring mud volcanoes systems was not done. In this preliminary study, the gravitational field analysis of the Kuwu-Cangkring mud volcano system was done by using GGmPlus satellite data with a 220 m grid and elevation data using ERTM. Free air anomaly data processing obtained a complete Bouguer anomaly value of 23 to 34 mGal. The separation process of anomalies using the upward continuation method produces a local of -0.5 to 0.5 mGal and a regional of 23 mGal to 34 mGal. The local anomaly value of Bledug Kuwu was -0.275 to - 0.05 mGal and Bledug Cangkring-0.125 to 0.1 mGal. The local anomaly around Bledug Cangkring is higher than Bledug Kuwu, indicating a lower density beneath Bledug Kuwu than in Cangkring.
Co-Authors Abdul Latif Ashadi Abdullah, Azar Rafliardi Agus Triyono Agusta Praba Ristadi Pinem Agustin, Eleonora Ananta, Aria Arga Ari Handono Ramelan Aryono Adhi, Aryono Bambang Sunardi, Bambang Budi Legowo Catur Edi Widodo Chatarina Muryani D, Darsono Darsono Darsono Doddy Sutarno eka rahmawati Eko Teguh Paripurno Fajrin, Viola Fernando, Gregrius Alvin Fuad Anwar, Fuad Hapsoro, Cahyo Aji Harjana Harjana I Nengah Simpen Ikhwana, Aina Zahra Ilham Ilham Imam Arifin Indriana, Rina Dwi Iwan Yahya Krismonanto, Wisnu Mariany, Aria Mariyanto Mariyanto Mimin Iryanti Mohtar Yunianto, Mohtar Muliddin Munandar, Choirul Singgih Nabila, Dhia Azmi Nugroho, Arif Rianto Nurcandra, Nakif Nursodik, Fajar Nurwidyanto, Muhammad Irham Prabowo, Urip Nur Wijayanto Pratiwi, Rizki Amalia Purnama, Anton Roy Rahmat Gernowo Rita Noviani, Rita Romadon, Irwan Safani, Jamhir Sakhina, Friska Ayu Salfas, Muhammad Saputra, Aditya Eka Sari Pratiwi Sehah Sehah Septianingsih, Mela Budiani Sibarani, Ferdinan Hotman Silvanto, Tri Sulistian, Teguh Susanto, Andika Dwi Cipta Syahrizal, Fadli Tampubolon, Danastri L. P. Udi Harmoko Wijayanti, Pipit Wuriatmo, Hastho Yohana Noradika Maharani YUDI PURWANTO