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EVALUASI KERENTANAN GEDUNG REKTORAT STTNAS TERHADAP GEMPA BUMI BERDASARKAN ANALISIS MIKROTREMOR Prastowo, Rizqi; Prabowo, Urip Nurwijayanto
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (242.247 KB)

Abstract

STTNAS building is a five floor building that located in the city o f Yogyakarta which is an area with a high intensity earthquake occurrence. The purpose o f this study is (1) determine the value o f the natural frequencies o f the building, (2) determine the index o f the resonance o f the building and (3) the vulnerability o f buildings to earthquakes. Research will be done by measuring the microtremor wave o f building STTNAS then analyzed using Spectral Floor Ratio (FSR). The analysis result is then compared with the classification defined in ISO 2002 on building resilience planning procedures earthquake. Fekuensi natural on the east-west component is 1.64 Hz and the north-south component is 1.644 Hz that is in conformity with the ISO 2002. Resonance Index o f building STTNAS is ranging from 31.00081 to 35.883% thus including the low category resonance during an earthquake. Building of STTNAS vulnerability index ranges are between 103,670.6191 to 82526.5357 with the highest value found on the 4th floor.
3D MODELLING OF ANDESITE USING RESISTIVITY DATA IN KALISONGGO MOUNT, KULON PROGO Trianda, Obrin; Prastowo, Rizqi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 2 (2018): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2104.263 KB)

Abstract

The needs for andesite stone for development in Kulon Progo is increasing, so a new andesite reserve is needed. This study aims to map andesit distribution in 2-D or 3-D in the research area. The determination of andesite distribution is based on the difference between the andesite resistivity value and the surrounding rocks. Geologically, Mount Kalisonggo and Songgo River are included in the Old Andesite Formation with the appearance of the colummnar joint structure.Field data was collected using a Geolistrik method with dipole-dipole configuration of 5 paths. The resistivity data is processed and modeled 2D using Res2Dinv software, so that the andesite resistivity cross-section model is obtained. Andesite distribution after the 2-D or 3-D modeling obtained thickness varies between 5-17 meters.
Identification of Slip Surfaces Using the Geoelectric Imaging Method in the Kalirejo Area, Kokap District, Yogyakarta, Indonesia Rizqi Prastowo; Hurien Helmi; Obrin Trianda; Rofiqul Umam
JIPF (Jurnal Ilmu Pendidikan Fisika) Vol 6, No 3 (2021): September 2021
Publisher : STKIP Singkawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26737/jipf.v6i3.2072

Abstract

Landslides are a significant threat to the environment, infrastructure, and human activity, especially in mountainous and hilly areas. It is, therefore, important to accurately identify the social movements that trigger these processes. The resistivity method can investigate subsurface geological variations, including the potential for landslides. This research was conducted to investigate the subsurface structures in the Kalirejo Village area, Kokap District, Kulon Progo Regency, Yogyakarta regarding identifying the sliding location. This investigation includes five lines of tomographic geoelectric measurements. The results show that the slips surface is at a depth of about 5-10 m with a high resistivity value and the landslide material is weathered soil, and the slip surface is andesite. The resistivity of andesite in range 668-1600 Ωm. The landslide material's thickness is around 5-8 m with resistivity in the range 4,01-22.1 Ωm. Landslide material is water-saturated soil.
Identification of Andesite Resource Potential In Kalirejo Area, Kokap Sub-District, Kulon Progo Using Resistivity Method Rizqi Prastowo; Hurien Helmi; Obrin Trianda; Rofiqul Umam
Forum Geografi Vol 35, No 1 (2021): July 2021
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v35i1.13507

Abstract

In the last five years, the need for materials to build infrastructure in Kulon Progo Regency has increased with the construction of an international airport. In the construction process, strong earth or rock materials are needed to make buildings resistant to earthquakes, one of which is andesite rock. This study aims to determine andesite rocks' resources using a three-dimensional model based on the value of resistivity in Kalirejo district Kokap Kulon Progo. The research was conducted by geological and geophysical survey. Based on data on the distribution of rocks in the research area included in the intermediate igneous rocks, andesite. These rocks are intrusions that develop in research areas. Petrography analysis is used to determine the types of minerals in andesite rocks and determine which levels of rock changes have changed or not to affect the strength of rocks. These rocks are intrusions that develop in research areas. Geophysical survey is by resistivity method using configuration dipole-dipole with five lines, and each stretch is 200 m. Based on three-dimensional model resistivity, fresh andesite is at a depth of between 5-10 m. Value of andesite resistivity is more than 668 Ωm, while the value of weathered andesite resistivity ranges from 256-536 Ωm and andesite resources about 332,580 tons.
PEMETAAN KETEBALAN LAPISAN SEDIMEN WILAYAH KLATEN DENGAN ANALISIS DATA MIKROTREMOR Rizqi Prastowo; Urip Nurwijayanto Prabowo; Rita Desiasni; Melfa Utari; Fitri Puspasari
KURVATEK Vol 1 No 2 (2016): November 2016
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v1i2.239

Abstract

Daerah Klaten dan sekitarnya secara geologi tertutup oleh endapan fluvial vulkanik Merapi,sehingga identifikasi struktur geologi bawah permukaan tidak nampak. Penelitian ini bertujuan untuk memetakan kedalaman lapisan sedimen di dataran klaten. Metode yang digunakan adalah Horizontal to Vertical Spectral Ratio (Metode Nakamura) dan pengukuran dilakukan secara grid sebanyak 31 titik. Hasil analisis frekuensi natural antara 0,67 – 10,655 Hz dan pemetaan lapisan sedimen yaitu mencapai 80-90m di kecamatan Kalikotes tepatnya desa Mojayan, Desa Gumulan dan Desa Kalikotes, sedangkan ketebalan lapisan sekitar 5-15m sebagian besar berada pada kecamatan Klaten Utara. Potensi kerusakan akibat efek ketebalan ini berakibat pada peningkatan ground shaking di permukaan akbat mikrozonasi.
PEMODELAN 2D RESISTIVITAS BATUAN ANDESIT DAERAH GUNUNG KUKUSAN KULON PROGO Rizqi Prastowo
KURVATEK Vol 2 No 2 (2017): November 2017
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v2i2.565

Abstract

Infrastruktur pembangunan bandara Internasional Yogyakarta berdasarkan rencana strategis Dirjen Perhubungan tersebut sangat besar sehingga perlu adanya material-material pembangunan untuk menunjang keterlaksanaan pembangunan bandara tersebut. Penelitian ini bertujuan untuk mengetahui nilai resistivitas, kedalaman, sebaran nilai resistivitas, dan interpretasi batuan andesit dari model 2D resistivitas di Gunung Kukusan, Desa Hargorejo, Kokap, Kulon Progo. Metode penelitian ini menggunakan metode geolistrik dipole-dipole dengan bentangan 200 m. Berdasarkan model 2D resistivitas, kedalaman batuan andesit segar di Gunung Kukusan, Desa Hargorejo, Kokap, Kulon Progo berkisar antara 3-15 m. Sebaran nilai resistivitas batuanandesit melalui hasil penampang model model 2D resistivitas yaitu nilai >522 Ωm, sedangkan nilai resistivitas batuan andesit yang telah mengalami pelapukan berkisar antara 179-659 Ωm. Interpretasi berdasarkan nilai resistivitas batuan terdapat 3 jenis batuan yaitu batuan lempung sebagai batuan yang diterobos intrusi, batuan andesit lapukan dan andesit segar.
IDENTIFIKASI KERENTANAN GERAKAN TANAH BERDASARKAN DATA GEOLOGI DAERAH KALIREJO, KECAMATAN KOKAP, KABUPATEN KULONPROGO, YOGYAKARTA Rizqi Prastowo; Obrin Trianda; Sely Novitasari
KURVATEK Vol 3 No 2 (2018): November 2018
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v3i2.782

Abstract

 Desa Kalirejo, Kecamatan Kokap merupakan salah satu daerah rawan gerakan tanah di Kabupaten Kulon Progo. Kondisi lereng yang begitu curam menjadi salah satu penyebab utama di daerah tersebut. Ditambah dengan pemanfaatan lahan yang kurang sesuai, yaitu dengan dibangunnya pemukiman pada lereng-lereng tebing yang curam menambah risiko terjadinya longsor yang dapat menimbulkan korban harta maupun jiwa. Apalagi Kabupaten Kulonprogo merupakan kabupaten yang sedang berkembang salah satunya di bidang pariwisata. Ketersediaan informasi yang lengkap dan akurat mengenai zona kerentanan gerakan tanah beserta kebijakan yang bisa dijadikan dasar dalam setiap aktivitas pengembangan merupakan hal yang sangat diperlukan demi mencegah dan meminimalkan korban jiwa dan dampak ekonomi yang ditimbulkan oleh karena itu untuk dapat mengantisipasi hal-hal tersebut perlu dilakukan pengkajian yang lebih mendalam mengenai potensi bencana gerakan tanah dengan harapan tidak memperparah kondisi pembangunan yang dilakukan di daerah tersebut. Berdasarkan dari hasil pengolahan data didapatkan output berupa peta zona kerentanan gerakan tanah daerah penelitian yang menunjukkan 3 zona kerentanan gerakan tanah, yaitu zona kerentanan gerakan tanah rendah, sedang, tinggi.
EVALUASI KERENTANAN GEDUNG REKTORAT STTNAS TERHADAP GEMPA BUMI BERDASARKAN ANALISIS MIKROTREMOR Rizqi Prastowo; Urip Nurwijayanto Prabowo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (242.247 KB) | DOI: 10.28989/angkasa.v9i1.113

Abstract

STTNAS building is a five floor building that located in the city o f Yogyakarta which is an area with a high intensity earthquake occurrence. The purpose o f this study is (1) determine the value o f the natural frequencies o f the building, (2) determine the index o f the resonance o f the building and (3) the vulnerability o f buildings to earthquakes. Research will be done by measuring the microtremor wave o f building STTNAS then analyzed using Spectral Floor Ratio (FSR). The analysis result is then compared with the classification defined in ISO 2002 on building resilience planning procedures earthquake. Fekuensi natural on the east-west component is 1.64 Hz and the north-south component is 1.644 Hz that is in conformity with the ISO 2002. Resonance Index o f building STTNAS is ranging from 31.00081 to 35.883% thus including the low category resonance during an earthquake. Building of STTNAS vulnerability index ranges are between 103,670.6191 to 82526.5357 with the highest value found on the 4th floor.
Pemetaan Spasial Kadar Kobal pada Endapan Laterit dengan Metode Ordinary Cokriging dan Inverse Distance Weighting: Spatial Mapping of Cobalt Content in Laterite Deposits Using Ordinary Cokriging Method and Inverse Distance Weighting Hendro Purnomo; Shilvyanora Aprilia Rande; Rizqi Prastowo
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 1 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i1.317

Abstract

Cobalt is a metallic element that can be found in laterite deposits with varying concentration in each lithology zone. Objective of this study was to compare the performance of the ordinary cokriging (OCK) and inverse distance weighting (IDW) in mapping the cobalt content of laterite deposits. Cross variogram analysis used the covariable Ni and Fe, and the selection of the variogram model used the residual sum of square parameter. The IDW interpolation process uses power 1 and 2. The determination of the best method is based on the mean error parameter, and the root mean square error. Meanwhile, to determine the accuracy of the OCK estimation results, the root mean square standardized prediction error is used. The study indicates that the performance of the OCK interpolation is better than IDW, with overestimated predictions. The results of OCK interpolation showed that the distribution of 0.1-0.18% cobalt spread in the northern part and narrowed in the southern part of the study area.
3D MODELLING OF ANDESITE USING RESISTIVITY DATA IN KALISONGGO MOUNT, KULON PROGO Obrin Trianda; Rizqi Prastowo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 2 (2018): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2104.263 KB) | DOI: 10.28989/angkasa.v10i2.279

Abstract

The needs for andesite stone for development in Kulon Progo is increasing, so a new andesite reserve is needed. This study aims to map andesit distribution in 2-D or 3-D in the research area. The determination of andesite distribution is based on the difference between the andesite resistivity value and the surrounding rocks. Geologically, Mount Kalisonggo and Songgo River are included in the Old Andesite Formation with the appearance of the colummnar joint structure.Field data was collected using a Geolistrik method with dipole-dipole configuration of 5 paths. The resistivity data is processed and modeled 2D using Res2Dinv software, so that the andesite resistivity cross-section model is obtained. Andesite distribution after the 2-D or 3-D modeling obtained thickness varies between 5-17 meters.
Co-Authors A.A Inung Arie Adnyano, A.A Inung Arie Abdul Latif Ashadi Agustinus Isjudarto Ahmad Said Akhmad Zamroni Al Hussein Flowers Rizqi Aldri, Riaferdo Amir Machmud Amir Machmud, Amir Andika Eko Prasetiyo Andika Eko Prasetiyo, Andika Eko Andyono B. Santoso Angger Bagus Prasetiyo Anggi Hermawan Anita Susiana Arimurti, Dyah Arum Bagus Gilang Pratama, Bagus Gilang Bahy, Muhammad Nauval Brahme, Nameeta Cengiz, Korhan Dandi Pranomo Eko Wahyu Hidayat, Eko Wahyu Fahrul Nurfajri Mokoagow Fajar Yulianto Prabowo Farid, Fajri Filipus Alfriyadi Junaidi firhad firmansyah Hasan Said Tortop Hendro Purnomo Herman, Sofiana Hidayatullah Shidiq hidayatullah sidiq Hikmahtiar, Syouma Hurien Helmi Ichwan Noor Ardiyat Ikah N. P. Permanasari Ilham Mopio Iman Pradana A. Assagaf Iqbal, Mochamad Iwan Tri Riyadi Yanto, Iwan Tri Riyadi Jemssy Ronald Rohi Jermsittiparsert, Kittisak Junior, Prince Robert Kapugu, Excellentia Riane Kittisak Jermsittiparsert Manmeet Kaur Melfa Utari Muhamad Syazali Muhammad Hafizh Hibullah Murkute, Yogesh Novandri Kusuma Wardana Oggi Heical Ardian Oggi Heicqal Ardian Oky Sugarbo Ozyurt, Basak Panse, Vishal R. Paramitha Tedja Trisnaning Puspasari, Fitri Radhitya, Berwyn Dzaky Rahmad Junaidi, Rahmad Randy Galaxy Rita Desiasni Rizal Maulana Rizal Maulana, Rizal Rofiqul Umam Sabrina Putri Puspitasari Sely Novita Sari Setiawan, Nanda Juli Setyo Pambudi Setyo Pambudi Shilvyanora Aprilia Rande, Shilvyanora Syamsul Huda Syamsul Huda Tarumasely, Nofry Hence Tedy Kurniawan Topac, Tuna Tortop, Hasan Said Tri Nugroho Suwarno Urip Nurwijayanto Prabowo Urip Nurwijayanto Prabowo Urip Nurwijayanto Prabowo, Urip Nurwijayanto Veronica Diana Anis Anggorowati Vico Luthfi Ipmawan Yonathan Ito