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All Journal Jurnal Fisika Unand GEA, Jurnal Pendidikan Geografi Journal of Geoscience, Engineering, Environment, and Technology Journal of Applied Geospatial Information Jurnal Geosains dan Teknologi Geodika: Jurnal Kajian Ilmu dan Pendidikan Geografi Journal of Earth and Marine Technology (JEMT) GeoEco
Ongky Anggara
Teknik Geomatika, Institut Teknologi Sumatera
Humanities Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences Transportation

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Penentuan Alternatif Lokasi Tempat Pembuangan Akhir (TPA) di Kota Bandar Lampung Menggunakan Sistem Informasi Geografis Ongky Anggara; Indri Nurlisa Febrina; Agel Vidian Krama; Dudung Muhally Hakim
Geodika: Jurnal Kajian Ilmu dan Pendidikan Geografi Vol 5, No 1 (2021): Juni 2021
Publisher : Program Studi Pendidikan Geografi Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/geodika.v5i1.3364

Abstract

Volume sampah yang terus meningkat dan kapasitas Tempat Pembuangan Akhir (TPA) Sampah di Kota Bandar Lampung yang semakin terbatas harus menjadi perhatian serius. Termasuk dengan merencanakan lokasi TPA yang baru, agar permasalahan sampah mampu dikurangi. Hal ini dilakukan mengingat di Kota Bandar Lampung hanya terdapat satu TPA yaitu TPA Bakung yang berlokasi di Kelurahan Bakung Kecamatan Teluk Betung Timur. Penelitian ini bertujuan untuk menentukan lokasi alternatif Tempat Pembuangan Akhir (TPA) dengan menggunakan sistem pengelolaan berbasis sanitary landfill. Penentuan alternatif lahan Tempat Pembuangan Akhir (TPA) sampah dalam penelitian ini menggunakan standar SNI 03-3241-1994. Penentuan lokasi alternatif menggunakan analisis Sistem Informasi Geografis dengan metode skoring dan overlay melalui 3 proses tahapan analisis yaitu: 1) tahap regional; 2) tahap penyisih; 3) tahap penetap. Berdasarkan hasil analisis rekomendasi lokasi alternatif TPA Kota Bandar Lampung terdapat pada wilayah Kecamatan Teluk Betung Barat dan kecamatan kemiling dengan total luas sebesar 477.48 Hektar dengan luasan wilayah data yang telah divalidasi sebesar 42.16 Hektar, validasi yang dilakukan ditinjau dari aksesibiltas jalan menuju lokasi yang sangat baik, kemiringan lereng di bawah 20% serta luasan lahan yang cukup luas menunjukan lokasi tersebut sesuai untuk alternatif Tempat Pembuangan Akhir (TPA) Sampah di Kota Bandar Lampung.
Penentuan Alternatif Lokasi Tempat Pembuangan Akhir (TPA) di Kota Bandar Lampung Menggunakan Sistem Informasi Geografis Ongky Anggara; Indri Nurlisa Febrina; Agel Vidian Krama; Dudung Muhally Hakim
Geodika: Jurnal Kajian Ilmu dan Pendidikan Geografi Vol 5, No 1 (2021): Juni 2021
Publisher : Program Studi Pendidikan Geografi Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/geodika.v5i1.3364

Abstract

Volume sampah yang terus meningkat dan kapasitas Tempat Pembuangan Akhir (TPA) Sampah di Kota Bandar Lampung yang semakin terbatas harus menjadi perhatian serius. Termasuk dengan merencanakan lokasi TPA yang baru, agar permasalahan sampah mampu dikurangi. Hal ini dilakukan mengingat di Kota Bandar Lampung hanya terdapat satu TPA yaitu TPA Bakung yang berlokasi di Kelurahan Bakung Kecamatan Teluk Betung Timur. Penelitian ini bertujuan untuk menentukan lokasi alternatif Tempat Pembuangan Akhir (TPA) dengan menggunakan sistem pengelolaan berbasis sanitary landfill. Penentuan alternatif lahan Tempat Pembuangan Akhir (TPA) sampah dalam penelitian ini menggunakan standar SNI 03-3241-1994. Penentuan lokasi alternatif menggunakan analisis Sistem Informasi Geografis dengan metode skoring dan overlay melalui 3 proses tahapan analisis yaitu: 1) tahap regional; 2) tahap penyisih; 3) tahap penetap. Berdasarkan hasil analisis rekomendasi lokasi alternatif TPA Kota Bandar Lampung terdapat pada wilayah Kecamatan Teluk Betung Barat dan kecamatan kemiling dengan total luas sebesar 477.48 Hektar dengan luasan wilayah data yang telah divalidasi sebesar 42.16 Hektar, validasi yang dilakukan ditinjau dari aksesibiltas jalan menuju lokasi yang sangat baik, kemiringan lereng di bawah 20% serta luasan lahan yang cukup luas menunjukan lokasi tersebut sesuai untuk alternatif Tempat Pembuangan Akhir (TPA) Sampah di Kota Bandar Lampung.
Penentuan Alternatif Lokasi Tempat Pembuangan Akhir (TPA) di Kota Bandar Lampung Menggunakan Sistem Informasi Geografis Ongky Anggara; Indri Nurlisa Febrina; Agel Vidian Krama; Dudung Muhally Hakim
Geodika: Jurnal Kajian Ilmu dan Pendidikan Geografi Vol 5, No 1 (2021): Juni 2021
Publisher : Program Studi Pendidikan Geografi Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/geodika.v5i1.3364

Abstract

Volume sampah yang terus meningkat dan kapasitas Tempat Pembuangan Akhir (TPA) Sampah di Kota Bandar Lampung yang semakin terbatas harus menjadi perhatian serius. Termasuk dengan merencanakan lokasi TPA yang baru, agar permasalahan sampah mampu dikurangi. Hal ini dilakukan mengingat di Kota Bandar Lampung hanya terdapat satu TPA yaitu TPA Bakung yang berlokasi di Kelurahan Bakung Kecamatan Teluk Betung Timur. Penelitian ini bertujuan untuk menentukan lokasi alternatif Tempat Pembuangan Akhir (TPA) dengan menggunakan sistem pengelolaan berbasis sanitary landfill. Penentuan alternatif lahan Tempat Pembuangan Akhir (TPA) sampah dalam penelitian ini menggunakan standar SNI 03-3241-1994. Penentuan lokasi alternatif menggunakan analisis Sistem Informasi Geografis dengan metode skoring dan overlay melalui 3 proses tahapan analisis yaitu: 1) tahap regional; 2) tahap penyisih; 3) tahap penetap. Berdasarkan hasil analisis rekomendasi lokasi alternatif TPA Kota Bandar Lampung terdapat pada wilayah Kecamatan Teluk Betung Barat dan kecamatan kemiling dengan total luas sebesar 477.48 Hektar dengan luasan wilayah data yang telah divalidasi sebesar 42.16 Hektar, validasi yang dilakukan ditinjau dari aksesibiltas jalan menuju lokasi yang sangat baik, kemiringan lereng di bawah 20% serta luasan lahan yang cukup luas menunjukan lokasi tersebut sesuai untuk alternatif Tempat Pembuangan Akhir (TPA) Sampah di Kota Bandar Lampung.
Slip Rate of Kumering Fault in Lampung Province Calculated from GPS Data from 2007 to 2021 Satrio Muhammad Alif; Putri Ferlia Cahyani; Ongky Anggara; Aditya Rizqiansyah
Jurnal Geosains dan Teknologi Vol 5, No 2 (2022): Juli 2022
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jgt.5.2.2022.83-90

Abstract

Kumering Fault in Lampung Province is a segment of SFZ that was tectonically active region that had generates large earthquakes. The earthquake hazard around Kumering Fault can be estimated by understanding slip rate of Kumering Fault. This research aim is to estimate slip rate of Kumering Fault by using GPS data from 2007 to 2021. GPS data used in this research are 6 periodic GPS sites and 1 continuous Sumatran GPS Array site. GPS data is processed to obtain daily solution coordinates which are used to calculate velocity by using least-square method of linear regression. Fault parallel velocities are calculated to estimate slip rate and locking depth of Kumering Fault. The  The process to obtain slip rate is using grid-search method by finding best fit velocities for all GPS sites. The velocities of GPS sites indicate Sundaland Plate movement. Fault parallel velocities shows the typical movement of right-lateral Kumering Fault. The slip rate of Kumering Fault estimated from this study is 18.2 ± 10 mm/year while the locking depth of the Kumering Fault is 17 ± 3 km. It proves that SFZ is rigid block. However, building more GPS sites in area study is mandatory to obtain better result.
Present-day Crustal Deformation in West Sumatra After Series of Sumatran Great Earthquake from 2004-2010 Satrio Muhammad Alif; Jenny Melynda Siagian; Ongky Anggara
Journal of Earth and Marine Technology (JEMT) Vol 3, No 2 (2023)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2023.v3i2.3733

Abstract

Present-day crustal deformation was an attempt to estimate earthquake potential, yet the presence of postseismic deformation should be carefully identified. Studying crustal deformation in West Sumatra has been important for this purpose since the series of Sumatran Great Earthquake from 2004-2010. This study utilized present-day GNSS data (2017-2021) and pre-2004 GNSS velocities to understand the present-day crustal deformation. Bernese 5.2 was used to process the GNSS data and linear regression was used to calculate present-day velocities. These velocities were transformed into an ITRF2000-based Sundaland plate reference frame and then the velocities were compared to pre-2004 velocities in the same reference frame. The present-day velocities were ranging from 28.4 mm/yr to 58.3 mm/yr in ITRF2014 and from 8.8 to 44.8 mm/yr in the Sundaland plate reference frame. This suggests West Sumatra was located on the Sumatra block of the Sundaland plate. The low velocity difference ( 11.7 mm/yr) with the random vector direction between present-day velocities and pre-2004 velocities shows that there is no postseismic deformation affecting West Sumatra. This proposes the utilization of present-day velocities for earthquake potential estimation in West Sumatra.
Coherence Analysis of Sentinel-1A Images in Various Land Covers Satrio Muhammad Alif; Ongky Anggara; Vidiya Ristiana
Jurnal Pendidikan Geografi Gea Vol 23, No 2 (2023)
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/gea.v23i2.61258

Abstract

Coherence analysis is a valuable technique to assess the suitability and similarity of pixel pairs between two radar images taken at different times. In this study, we conducted coherence analysis on a series of Sentinel-1A images acquired between 2017 to 2022 in Palembang, Indonesia, encompassing various land covers. The analysis was conducted on different land covers, including urban areas, agricultural lands and natural terrains. The study aimed to identify land cover types with high coherence values Sentinel-1A images, as these could indicate stable or unchanged surfaces. The results show that land cover in Palembang which has high coherence is open land and built area. The average coherence value in the study area from 2017 to 2022 is ~0.2 to ~0.27, indicating relatively stable surfaces. This study is useful as initial consideration to utilize Sentinel-1A image for further research in earthquake and disaster analysis.
Analisis Deformasi di Lampung dan Selat Sunda berdasarkan Data GNSS tahun 2018 hingga 2021 Ongky Anggara; Muhammad Ario Eko Rahadianto; Satrio Muhammad Alif; Een Lujainatul Isnaini
Jurnal Fisika Unand Vol 13, No 5 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.5.637-643.2024

Abstract

The Lampung Province and Sunda Strait have a seismic gap zone with the potential for major earthquakes in the future. This study analyzes the deformation occurring in this region using continuous Global Navigation Satellite System (GNSS) station data from Indonesia Continuously Operating Reference Station (InaCORS) and Sumatran GPS Array (SuGAr) from 2018 to 2021.5. The GNSS data was processed using the Bernese 5.2 scientific software, applying least squares for velocity changes and statistical tests to analyze significance. The data processing was carried out in two schemes: the first scheme covering 2018-2020, and the second covering 2019-2021. The results of the deformation analysis from 2018 to 2021, using two continuous GNSS data processing schemes, showed velocity changes relative to the Sundaland Plate ranging from ~2 mm/year to ~20 mm/year. In the eastern region of the Sumatra fault, the velocity changes were smaller, around ~5 mm/year, due to the minimal influence of tectonic activity. However, in the Sunda Strait region, the deformation was influenced by volcanic activity. The deformation occurring in Lampung Province and the Sunda Strait, based on GNSS velocity changes, significantly contributes to tectonic and volcanic activities.
Perbandingan Kualitas InaCORS dan SuGAr untuk Studi Pemantauan Deformasi Kerak di Sumatera Alif, Satrio Muhammad; Siregar, Ribhan Nafiz; Siburian, Yesica Tumim; Anggara, Ongky
Jurnal Geosains dan Teknologi Vol 6, No 3 (2023): November 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jgt.6.3.2023.145-154

Abstract

Pemantauan deformasi kerak di Sumatera merupakan hal penting dalam pemahaman aktivitas tektonik dan potensi gempa bumi di wilayah tersebut. Tingginya aktivitas tektonik di Pulau Sumatera dapat dikuantifikasi dengan pengamatan stasiun kontinu. Penelitian ini membandingkan kualitas dua jaringan pengamatan stasiun kontinu yang tersedia di Pulau Sumatera yaitu Sumatran GPS Array (SuGAr) dan Indonesia Continuously Operating Reference Stations (InaCORS). Data stasiun kontinu yang digunakan, diamati dari 2020 hingga 2022, dan digunakan untuk menganalisis perubahan posisi permukaan dan deformasi kerak secara kontinu. Hasil perbandingan kedua jenis stasiun kontinu menunjukkan bahwa stasiun SuGAR dan stasiun InaCORS memiliki ketelitian yang baik dengan orde milimeter. Pada hasil komponen horizontal dan komponen vertikal, nilai ketelitian stasiun SuGAR lebih baik dibandingkan stasiun InaCORS. Kedua data merupakan sumber data yang penting untuk pemantauan deformasi kerak sehingga penggunaan kedua stasiun ini secara kombinasi dapat memberikan gambaran yang lebih komprehensif tentang pemantauan pergerakan deformasi kerak di Sumatera.
Present-day Crustal Deformation in West Sumatra After Series of Sumatran Great Earthquake from 2004-2010 Alif, Satrio Muhammad; Ching, Kuo-En; Siagian, Jenny Melynda; Anggara, Ongky
Journal of Earth and Marine Technology (JEMT) Vol 3, No 2 (2023)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2023.v3i2.3733

Abstract

Present-day crustal deformation was an attempt to estimate earthquake potential, yet the presence of postseismic deformation should be carefully identified. Studying crustal deformation in West Sumatra has been important for this purpose since the series of Sumatran Great Earthquake from 2004-2010. This study utilized present-day GNSS data (2017-2021) and pre-2004 GNSS velocities to understand the present-day crustal deformation. Bernese 5.2 was used to process the GNSS data and linear regression was used to calculate present-day velocities. These velocities were transformed into an ITRF2000-based Sundaland plate reference frame and then the velocities were compared to pre-2004 velocities in the same reference frame. The present-day velocities were ranging from 28.4 mm/yr to 58.3 mm/yr in ITRF2014 and from 8.8 to 44.8 mm/yr in the Sundaland plate reference frame. This suggests West Sumatra was located on the Sumatra block of the Sundaland plate. The low velocity difference ( 11.7 mm/yr) with the random vector direction between present-day velocities and pre-2004 velocities shows that there is no postseismic deformation affecting West Sumatra. This proposes the utilization of present-day velocities for earthquake potential estimation in West Sumatra.
Analysis Of Presumed Land Subsidence In The Cities Of Lampung Province Using InSAR And GNSS Data Alif, Satrio Muhammad; Anggara, Ongky; Perdana, Redho Surya; Hasannah, Uswatun; Azizah, Fadhillah Nur
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 3 (2024): JGEET Vol 09 No 03 : September (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.3.14096

Abstract

Land subsidence is a naturally occurring phenomenon that has become a growing concern in various regions, including Lampung Province. In this study, we investigate land subsidence in various cities within Lampung Province, Indonesia, utilizing Sentinel-1A using Sentinel-1A satellite image data from the period 2014 to 2022. The cities of Lampung Province analyzed in this study were Liwa, Kota Agung, Kalianda, Sukadana, Bandar Lampung and Krui. The method used is Interferometric Synthetic Aperture Radar (InSAR) with the Small Baseline Area Subset (SBAS) technique. Furthermore, to validate and improve the accuracy of land subsidence measurements, the Global Navigation Satellite System (GNSS) velocities were utilized. The land subsidence result obtained in this study is presumed land subsidence. The cities that experienced land subsidence was Kalianda, Sukadana, Bandar Lampung and Krui ranging from ~3 mm/yr to ~15 mm/yr. Meanwhile, the areas that experienced an uplift were the Liwa and Kota Agung cities.
Co-Authors Aditya Rizqiansyah Andhika Wahyu Pratama Azizah, Fadhillah Nur Ching, Kuo-En Een Lujainatul Isnaini Een Lujainatul Isnaini Een Lujainatul Isnaini Jenny Melynda Siagian Krama, Agel Vidian Meraty Ramadhini Muhammad Afan Akbar Muhammad Al Kautsar Muhammad Ario Eko Rahadianto Muhammad Ario Eko Rahadianto Novia Rohmadona Perdana, Redho Surya Putri Ferlia Cahyani Redho Surya Perdana Satrio Muhammad Alif Siagian, Jenny Melynda Siburian, Yesica Tumim Siregar, Ribhan Nafiz Vidiya Ristiana Wendi Melvin Hutabarat