Hydro-Oceanography Modelling Characteristic (Tides, Waves, and Currents) in Kelabat Bay, Bangka Belitung

Kelabat Bay is one of the most important waters in northern Bangka Island since it is a semi-enclosed bay and directly face Karimata Strait and Natuna Sea. Furthermore, in the last ten years, the provincial government of Bangka Belitung plans to make Teluk Kelabat become an intergrated marine-fisheries development. Thus, the purpose of this study is to obtain a good database of hydro-oceanography characteristics (Currents, Waves, and Tides) in Kelabat Bay to support the development plans in these region. Interest area of this study is at the outer and inner part of Kelabat Bay. In this study, hydro-oceanography characteristics of Kelabat Bay will be focused on 3 parameters : currents, waves, and tides. Numerical modelling method is used in this research using Regional Ocean Modeling System (ROMS) for current model and Simulating Waves Nearshore (SWAN) for wave model. This research also use tidal data from Babel Ocean Observation Science and Technologies (BOOST) Center under the Marine and Fisheries Agency of Indonesia to verify the model’s results. From this research, tides type of Kelabat Bay is diurnal with Formzahl 3.1687, mean sea level 61 cm, and tidal range around 0-2.1 m. Significant wave height (Hs) in Kelabat Bay around 0.07-0.8 meters. At west monsoon, the wave direction dominant to southeast and goes to north at east monsoon. Furthermore, the currents start from 0.02 m/s to 1.3 m/s and dominantly influenced by tidal. The highest current amplitude are located at the gap between Teluk Kelabat Luar dan Teluk Kelabat Dalam caused by very narrow and shallow condition. Keywords— Hidro-Oceanography Modelling, Currents, Waves, Tides, Kelabat Bay