Modelling baroclinic circulation and particle tracking in Inner Ambon Bay

Abstract

; Generally in Inner Ambon Bay (IAB) the sedimentation problem generate revamp of waters base configuration that influence IAB circulation process. We use model tool of MIKE 3 FM in this research to modeling three-dimensional hydrodynamics of process circulation and modeling of particle tracking. The purposes of the research are to analysis pattern of water mass circulation which is considering the baroclinic mode, to estimate the movement and pattern of cohesive sediment from every river inflow and to estimate the flushing as well as residence time of IAB. Simulation result of models is to represent circulation and particle movement in rainy season and dry season in IAB. In baroclinic mode the vertical eddy dominant happen in middle of IAB and in front of Poka-Galala sill. This vertical eddy is influenced by topography configuration and stratification water mass due to the rivers inflow. In model simulation of particle tracking the pattern of particle movement is dominant in middle of bay and along coastal of Lateri and Halong. The average of residence time and flushing time are 5 days and 9 days in rainy season, respectively while those in dry season are 2 days and 5 days respectively.