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The Contribution of Oceanographic Numerical Model In Supporting Integrated Coastal Management Around Komodo Island, Indonesia Titri Yan Rizki 1 , Gegar Prasetya 2 , Fitri Suciaty 3 PT. ASR, Ltd Kantor Taman A9 Unit D, 5th floor Jl. Mega Kuningan Lot 8,9 / A9 Jakarta, Indonesia 1 titri@asr.co.id, 2 gegar@asr.co.id, 3 fitri@asr.co.id Abstract. Komodo National Park (KNP), an international tourism and UNESCO's World Heritage Sites, is located between Sumbawa Island and Flores Island. The National Park’s Authority had produced 25 Year Master Plan for Management supported by The Nature Conservancy, Gajah Mada University, and Manggarai District Authority (KNP et al., 2000) for the three main islands of KNP (Komodo, Rinca, and Padar). While there is no coastal management for the surrounding areas of the KNP even though they share the same body of water, and possibly having a similar ecosystem and ecology conditions. However, there is no literature on the dynamic of the ocean and coastal waters surrounding the region had been published. Therefore, systematic studies need to be carried out to assess the role of the ocean and coastal water circulations of this region to the biodiversity and sustainable management of the marine and coastal resources towards sustainable management of the National Park. ASR Indonesia has initiated the establishment of integrated coastal zone management plans with local governments on this region which cover the whole areas between East Sumbawa Island and West Flores Island. At the beginning, oceanographic numerical modelling using 3DD Suite (Black, 2001) has been simulated in two dimensions for hydrodynamics parameters such as currents and sea level considering tidal and wind conditions. The results of these simulations indicate that there are several locations around the KNP which could potentially generate non-renewable energy by ocean currents flow with velocity reached 3.5 m/s in east monsoon and 3.7 m/s in the west monsoon. In addition, conservative particle dispersals distribution has been simulated and developed into a trajectory model of certain fish larvae distribution, according to the fisheries potential in the area, such as grouper, snapper, and pomfret (West Manggarai Regency, 2007). Zonation will be derived from these modelling results as a basis for sustainable management and conservation of the coastal and marine resources based on the ecosystem and ecology boundaries. Keywords: currents, fisheries, integrated coastal management, Komodo National Park, ocean model 42
Sediment Classification for Geotechnics Using Sonar Technology 1) Henry M. Manik, 2) Bambang Supartono 1) Department of Marine Science and Technology Bogor Agricultural University Kampus IPB Darmaga Bogor 16680 Indonesia E-mail : henrymanik@ipb.ac.id 2 Graduate Program of Marine Technology Bogor Agricultural University Kampus IPB Darmaga Bogor 16680 Indonesia Abstract. The purpose of this study was to calculate the value of the bottom backscattering strength (SS) using a single beam sonar. The research was conducted on 29 January to 3 February 2012 in the surrounding waters of the Seribu Islands, North Jakarta. Acoustic data acquisition was conducted using the instrument cruzpro sonar. Acoustic data obtained from 9 stations simultaneously with sampling of sediment substrate. Processing of acoustic data was conducted using Matlab software and the numerical model of Manik et al. (2006). Sample of sediment was classified based on the analysis of sediment texture. Using the grain size analysis, the seafloor sediments consist of sand and clay. Sand and clay bottom had different bottom backscattering level. Therefore, classification of the seafloor type using sonar technology for marine geotechnic was possible. Keywords : sonar, backscattering, seabed, classification, geotechnic 43
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