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All Journal JGISE-Journal of Geospatial Information Science and Engineering Jurnal Nasional Teknologi Terapan Geoid - Journal of Geodesy and Geomatics
Ulinnuha, Hilmiyati
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science

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Pemanfaatan Citra Side Scan Sonar untuk Identifikasi Objek Bawah Laut Prayetno, Eko; Ulinnuha, Hilmiyati
Jurnal Geospasial Indonesia Vol 3, No 1 (2020): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jgise.55158

Abstract

Lamong Bay waters are part of the Port of Tanjung Perak Surabaya. This port is included in one of the busiest ports in Indonesia. Therefore, a study is needed on the condition of the bottom waters and underwater infrastructure buildings to provide information on the safety of the shipping lanes and the landing of the lego anchor on the position of the underwater infrastructure. This study involves exploration activities such as the detection and sweeping of objects at the bottom of the sea and taking sediment samples using side scan sonar instruments and van veen grab sampler. This activity aims to identify the condition of objects of sea cables and pipelines in the waters of the Lamong Bay waters, evaluating the rules of immersion of submarine cables and pipelines in accordance with the Minister of Transportation Regulation No. PM 129 of 2016. The results of this activity will be in the form of a map of sea cables and sea pipes which will be attached to the Lamong Bay Field Painting Sheet. The submarine cable target recorded is in Line A with the cable target detected 2 (two) cable lines. Whereas the sea pipe is located at Lane B. The results of the inspection are to be placed on the Indonesian Sea Map No. 84 to determine the position of sea cables and  pipelines. Each of the submarine cable and pipelines target was analyzed by Minister of Transportation Regulation No. PM 129 of 2016 concerning the regulation of immersion of underwater buildings. The results of the submarine cable and pipelines analysis have met the installation standards even though they are at a shallow depth. This suitability is seen based on dictum 2 (two) rules of burial that burials do not apply to the position of the underwater buildings crossing each other.
Analisis Pengaruh Gempa Tektonik 10 Juli 2013 Terhadap Perubahan Koordinat Stasiun Pantau Segmen Mentawai Ulinnuha, Hilmiyati; Sunantyo, Aris; Widjajanti, Nurrohmat
Jurnal Nasional Teknologi Terapan (JNTT) Vol 3, No 1 (2019): JULI
Publisher : Penelitian dan Pengabdian Kepada Masyarakat Sekolah Vokasi Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (243.824 KB) | DOI: 10.22146/jntt.37493

Abstract

Mentawai Segment is located in Mentawai Islands, Sumatra, Indonesia. This segment is a subduction zone between Indo-Australian plate and Eurasian plate. This subduction zone can lead to high potential of tectonic earthquake in Mentawai Segment. The high potential of tectonic earthquake has negative impact for the community, so it is necessary to monitor the risk of tectonic earthquake in Mentawai Segment. This monitoring can be done by using GPS data of monitoring station that spread in Mentawai Segment. Therefore, this research aims to analyze the effect of tectonic earthquake on the coordinate change of Mentawai Segment, so that it can reduce the risk of negative impact of tectonic earthquake in Mentawai Segment. This research use observation data of 10 continuous GPS monitoring station (Sumatran GPS Data Array / SuGAr) in Mentawai Segment. Day of observation data was day of year (doy) at the time of tectonic earthquake occurence on July 10, 2013. Data processing used GAMIT / GLOBK software. The results of this research indicate that the tectonic earthquake (July 10, 2013) affected coordinates changes of the SuGAr station significantly two hours after the tectonic earthquake occurred.
ANALISIS BATIMETRI SUNGAI SERANG UNTUK MENDUKUNG PENGEMBANGAN INFRASTRUKTUR YOGYAKARTA Ulinnuha, Hilmiyati; Faridatunnisa, Maritsa; Basith, Abdul
GEOID Vol. 15 No. 2 (2020)
Publisher : Departemen Teknik Geomatika ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/geoid.v15i2.1647

Abstract

One criteria of a good infrastructure is to connect land, sea, and air transportation routes. To support good infrastructure in Yogyakarta, the development of Tanjung Adikarto port, located close to New Yogyakarta International Airport, is needed. Instead of having a good port infrastructure, Tanjung Adikarto Port experience sedimentation due to various factors. One of them is sediment carried by Serang River. Therefore, this study aims to analyze Serang River bathymetry and interpolate location of sedimentation in Serang River. The method of bathymetry analysis used is by testing the accuracy of the depth measurement data and interpolate the sedimentation location based on the transverse and longitudinal profile of the Serang River. In addition, Serang River tidal data analysis was also carried out and development problems in Tanjung Adikarto Port is also evaluated. The results of this study indicate that the tides still affect the dynamics of the Serang River up to about 1 km from the Tanjung Adikarto Port breakwater area. According to IHO standards, Serang River depth measurement data classified as Order 1, while sedimentation occur in the river bank area and around the entrance of Tanjung Adikarto Port. As for infrastructure development problem, Tanjung Adikarto Port sedimentation problem might be caused by breakwater conditions. However, this may requires further study.
Estimasi Potensi Gempa Tektonik di Wilayah Sesar Opak Berdasarkan Data Pengamatan GPS Ulinnuha, Hilmiyati; Lestari, Dwi; Widjajanti , Nurrohmat; Parseno, Parseno; Pratama, Cecep; Heliani, Leni Sophia; Novianti, Suci Tresna
GEOID Vol. 18 No. 1 (2022)
Publisher : Departemen Teknik Geomatika ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/geoid.v18i1.1752

Abstract

Yogyakarta merupakan daerah ring of fire dengan adanya wilayah-wilayah subduksi lempeng tektonik. Kondisi ini mengakibatkan tingginya potensi gempa tektonik di daerah Yogyakarta. Seperti pada tahun 2006, telah terjadi gempa tektonik dengan skala 6,3 Mw di Yogyakarta dan menimbulkan dampak negatif. Gempa ini disebabkan oleh aktivitas Sesar Opak. Berdasarkan penelitian sebelumnya, segmen patahan Sesar Opak tidak semua melepaskan energi, sehingga dimungkinkan berpotensi menimbulkan gempa tektonik besar di masa yang akan datang. Oleh karena itu, penelitian ini bertujuan untuk mengenalisis dan mengestimasi potensi gempa tektonik di sekitar wilayah Sesar Opak berdasarkan data pengamatan GPS. Penelitian ini juga mengestimasi maximum magnitude dan periode perulangan maximum magnitude tersebut. Data yang digunakan dalam penelitian ini adalah data pengamatan GPS pada titik-titik pantau Sesar Opak sejumlah 11 buah dari tahun 2016, 2017, dan 2018. Data pengamatan GPS diolah dengan perangkat lunak GAMIT/GLOBK. Data diolah dengan membagi area menjadi sebelah Timur dan sebelah Barat Sesar Opak. Selanjutnya, dilakukan perhitungan estimasi maximum magnitude dan periode perulangan maximum magnitude. Hasil dari pengolahan data GPS menunjukkan bahwa resultan kecepatan pergeseran horizontal titik pantau Timur Sesar Opak lebih besar dari pada titik pantau Barat Sesar Opak. Hal ini dapat mengindikasikan Timur Sesar Opak lebih aktif dari pada Barat Sesar Opak. Adanya pergeseran aktif ini dapat menimbulkan potensi gempat tektonik dikemudian hari. Selain itu, hasil estimasi maximum magnitude yang dapat terjadi di wilayah Sesar Opak adalah 6,5 Mw dengan periode perulangan maximum magnitude selama ± 60 tahun pada Segmen Utara dan selama ± 130 tahun pada Segmen Selatan. Namun hasil perhitungan estimasi ini masih perlu disempurnakan dengan dengan menambahkan data lain seperti seismik multitemporal.
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Basith Dwi Lestari Faridatunnisa, Maritsa Heliani, Leni Sophia Novianti, Suci Tresna Nurrohmat Widjajanti Parseno Parseno Pratama, Cecep Sunantyo, Aris Widjajanti , Nurrohmat