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Trapped Sediment in Seagrass Ecosystem: Bintan Island
Summary
This study models sediment transport and trapping in seagrass ecosystems around Bintan Island, Indonesia. Seagrass beds act as natural filters that can trap both sediment and microplastics, making them important zones for microplastic accumulation in coastal environments.
This study attempts to figure out the physical characteristics of water in the surrounding Bintan Island and considers the role of the seagrass ecosystem in trapping sediment transport using model simulation.Field observation was conducted during the first transitional monsoon to collect the ocean current data and Total Suspended Solids (TSS) at the three observation stations (Pengudang, Teluk Bakau, and Madong).A hydrodynamic flow model was employed to simulate the current pattern and sediment transport.Based on the simulation result, the existence of seagrass meadows in the Pengudang and Madong areas could significantly trap the sediment and induce sedimentation.Of particular concern, it is predicted that sediment transport in all stations will gradually decrease by about 15% per year throughout 2019-2023.This prediction was applied without any further changes in water conditions in Bintan Island so that different results could be potentially gained according to many factors influencing the movement of sediment.
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