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All Journal JURNAL ILMIAH GEOMATIKA Jurnal Riset dan Rekayasa Kelautan
Dwi Haryanto
Balai Teknologi Survei Kelautan, Badan Pengkajian dan Penerapan Teknologi (BPPT)
Chemistry Computer Science & IT Earth & Planetary Sciences Environmental Science Mathematics Physics

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STUDI PENENTUAN LOKASI BUOY TSUNAMI DI SAMUDERA INDIA SELATAN JAWA-BALI Dwi Haryanto; Adam Budi Nugroho; Muhamad Irfan; Yudo Haryadi
Oseanika Vol. 2 No. 1 (2021): Oseanika: Jurnal Riset dan Rekayasa Kelautan - Juni 2021
Publisher : Laboratory for Marine Survey Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/oseanika.v2i1.4874

Abstract

[Study for Determination of Tsunami Buoy Location in Indian Ocean of Southern Java-Bali]. Indonesia is  located on the border of three tectonic plates that slide over each other, the Indo-Australian Plate, the Pacific Plate, and the Eurasian Plate. This relative movement between tectonic plates can cause tectonic earthquakes in the sea. Tectonic earthquakes at sea are one of the main causes of tsunamis in Indonesia. Ina-Buoy is a tsunami warning technology system that includes sensors installed on the seabed (ocean bottom unit (OBU)) and these sensors send signals to a surface buoy station that floats on the sea surface using a mooring system. The installation of a tsunami buoy must be in the right location and consider several parameters, namely: depth parameter, seabed gradient, and seabed material type. A study for determination of tsunami buoy locations in Southern Java-Bali based on a three-parameter assessment has resulted in three appropriate locations for tsunami buoy installation. The first locations is in southern Malang at coordinates 112°31'34”E, 9°11'41”S which has a depth of 2042m,  seabed gradient of 2° or 2.5%, and the type of seabed material is greenish ash clay with thickness of about 20 cm. The  second locations is in southern Sunda Strait at coordinates 104°00'22”E, 6°30'19”S which has a depth of 2038m , seabed gradient of 0.31° or 0.5%, and the type of seabed material is greenish ash claym with thickness of about 25 cm. While    the third location is in Southern Bali at coordinates 115°12'37.52E, 9°44'22.38S which has a depth of 4282.5m, seabed gradient 0.31° or 0.5%, and the type of seabed material is the form of ash clay with Brownish  with thickness of about 30 cm. Keywords: Tsunami buoy, sea water depth, gradient, and type of seabed material
TINJAUAN TEKNIS PENEMPATAN SISTEM MOORING BUOY DAN OBU INA-TEWS DI DASAR LAUT Muhamad Irfan; Yudo Haryadi; Dwi Haryanto; Alfi Rusdiansyah
Oseanika Vol. 2 No. 1 (2021): Oseanika: Jurnal Riset dan Rekayasa Kelautan - Juni 2021
Publisher : Laboratory for Marine Survey Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/oseanika.v2i1.4952

Abstract

[Technical Review of the Placement Mooring Buoy System and OBU Ina-TEWS on the Seabed] The development of tsunami early warning system technology has been carried out by BPPT since 2006. In addition to its development, BPPT has a duty in 2021 to install a tsunami early warning system in the ocean with a buoy platform using the Research Vessel Baruna Jaya BPPT as an ocean going survey vessel. The method of the placement a buoy platform on the seabed has to be well planned for the design, technical specifications, operational plans, and standard procedure of technical implementation. Because the buoy platform was manufactured at a high cost, and the survey operation requires a large amount of money, this system must be deployed in the ocean accurately using advanced marine survey technology. In addition, weather conditions have to be considered carefully because the location is on the open ocean. The state of ocean currents must also be carefully observed in order for the mooring buoy system to be properly installed, and the OBU system is able to detect sea level and communicate it to the surface buoy, which is subsequently send by satellite to the Ina-TOC data center in Jakarta. Keywords:      Ina-TEWS, marine survey, mooring system, buoy platform, research vessel, tsunami
SURVEI DIMENSIONAL DAN KALIBRASI SISTEM MULTIBEAM LAUT DALAM DI KAPAL RISET BARUNA JAYA I: (Dimensional Survey and Calibration of Deep-water Multibeam System of RV Baruna Jaya I) Dwi Haryanto; Hendra Kurnia Febriawan; Ahmad Fawaiz Safi'; Muhamad Irfan
Geomatika Vol. 26 No. 2 (2020): JIG Vol. 26 No. 2 Tahun 2020
Publisher : Badan Informasi Geospasial

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Abstract

Wilayah laut Indonesia bagian tengah dan timur merupakan perairan laut dalam dengan informasi batimetri yang masih terbatas. Data batimetri laut dalam dapat diperoleh menggunakan alat survei khusus, yaitu Multibeam Echosounder (MBES). MBES laut dalam pada Kapal Riset (KR) Baruna Jaya I mampu menghasilkan data batimetri hingga kedalaman 11 km. MBES laut dalam tersebut mempunyai dimensi fisik yang relatif besar, sehingga transducer MBES harus dipasang secara permanen pada tunas kapal. Sistem MBES laut dalam terdiri dari beberapa sensor yang terintegrasi dalam satu sistem akuisisi MBES. Agar menghasilkan data batimetri berkualitas tinggi, perlu dilakukan survei dimensional untuk memperoleh informasi sudut miss-alignment transducer MBES dan posisi secara 3D (tiga dimensi) sensor sistem MBES laut dalam secara akurat dalam satu referensi sistem koordinat. Paper ini bertujuan untuk memperoleh nilai ketidaklurusan (miss-alignment) transducer MBES dan nilai offset sensor - sensor yang terpasang pada KR Baruna Jaya I terhadap suatu sistem koordinat kapal menggunakan metode survei dimensional. Selain itu, hasil survei dimensional tersebut diverifikasi secara dinamis menggunakan metode kalibrasi patch test. Hasil survei dimensional menunjukkan pemasangan fairing sebagai rumah transducer MBES memenuhi toleransi dengan nilai roll: -0,089˚ dan yaw: 0,292˚ sedangkan nilai pitch (-0,120˚ ) tidak memenuhi toleransi. Hasil pemasangan transducer MBES menunjukkan nilai roll dan yaw memenuhi toleransi (roll: 0,012˚ dan yaw: 0,200˚ ), sedangkan nilai pitch di atas ambang toleransi (pitch: 0,698˚ ). Nilai kesalahan pemasangan transducer diverifikasi dengan hasil kalibrasi Patch Test MBES dan mendapatkan nilai roll: 0,20°, pitch: 0,45°, dan yaw: -1,43°.
Co-Authors Adam Budi Nugroho Ahmad Fawaiz Safi' Alfi Rusdiansyah Hendra Kurnia Febriawan Muhamad Irfan Yudo Haryadi