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All Journal Jurnal Riset dan Rekayasa Kelautan
Hendra Kurnia Febriawan
Agency for The Assessment and Application of Technology
Chemistry Computer Science & IT Earth & Planetary Sciences Environmental Science Physics

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ASSESSMENT OF A LOW-COST SIDE-SCAN SONAR FOR RIVER ESTUARY UNDERWATER IMAGING Hendra Kurnia Febriawan
Oseanika Vol. 1 No. 1 (2020): Oseanika: Jurnal Riset dan Rekayasa Kelautan - Juni 2020
Publisher : Laboratory for Marine Survey Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/oseanika.v1i1.4053

Abstract

River and estuary areas commonly exhibit complex and heterogeneous habitats. Thus, revealing the distribution of riverbed morphologies could promote the area management and habitats protection. Since the remote sensing method and manual survey are limited to use, side-scan sonar performs an expectant outcome in underwater habitat imaging. In shallow water and stream areas, low-cost side-scan sonar imaging has become a notable subject of study, yet its use in Indonesia is still limited. This study describes an investigation of the use of a recreational-grade side-scan sonar for stream underwater imaging. A visual inspection and interpretation were implemented using a free-cost sonar software. The result shows some underwater objects and debris could be portrayed perfectly and this indicates that the inexpensive sonar system is appropriate to be used in shallow water and stream areas with a non-rough sea surface. It is suggested that this system could provide a satisfactory product to the users who do not require high accuracy and high resolution of riverbed imagery.Keywords: estuary, river, underwater mapping, acoustic remote sensing, low-cost, side-scan sonar.
SURVEI HIDRO-OSEANOGRAFI DI PERAIRAN RAJA AMPAT, PAPUA BARAT, INDONESIA Athur Yordan Herwindya; Hendra Kurnia Febriawan; Adam Budi Nugroho; Arnold Dannari
Oseanika Vol. 1 No. 2 (2020): Oseanika: Jurnal Riset dan Rekayasa Kelautan - Desember 2020
Publisher : Laboratory for Marine Survey Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/oseanika.v1i2.4529

Abstract

[Hydro-oceanographic Survey at Raja Ampat Waters, West Papua, Indonesia] Raja Ampat archipelago is one of the major tourism destinations in Indonesia and a nature conservation area. This is due to the abundance of biodiversity, natural features and resources, as well as culture. In 2014, the Indonesian government organized Sail Raja Ampat as a promotion program for the development of Raja Ampat. Badan Pengkajian dan Penerapan Teknologi (BPPT) took part in the event by using RV Baruna Jaya IV to perform a marine survey and technological dissemination activity. This study is aimed to describe hydro-oceanographic survey activity at the Raja Ampatwaters as a part of the Sail Raja Ampat. The survey was conducted at the two main areas: Teluk Kabui and Selat Sagewin. Results indicate that the survei has successfully revealed morphological features in both areas. The bathymetry shows that Teluk Kabui has a bathymetry depth of 18 – 53 meters, while the bathymetry of Selat Sagewin is about 104 – 508 meters. The average temperature of the region is approximately 29.2? – 30.5?C with a salinity of 31 - 34 psu. Lithological features as sandstones, limestones, and clays were also obtained. Those results and data are useful to complement the existing data and to future research activities. In addition, the data could also be used to evaluate the natural characteristics of Raja Ampat waters and to support the development activity in that area.Keywords: Raja Ampat, hydrography, oceanography, multibeam, CTD, sub bottom profiler
Co-Authors Adam Budi Nugroho Arnold Dannari Athur Yordan Herwindya