Hydrodynamic and cohesive sediment transport modeling in Ciletuh Bay, West Java, Indonesia

Ciletuh Bay (Teluk Ciletuh) is a semi-open beach in the form of a horseshoe in West Java, Indonesia. It has a very complex geological phenomenon and is a part of the UNESCO Global Geopark, however, the human activity in this water is high. This high rate of human activities contributes to the domestic and home industry waste nutrients through rivers that empty to its water, declining the environmental qualities of its water ecosystem. This article aimed to analyze the dynamics of sediment transport in the water of Ciletuh Bay using Mike 21's visualization of hydrodynamic modeling and mud transport with a remote sensing method. The visualization results show a very high TSS value, namely 4,000-52,000 mg L"1 hour-1, indicating a high sedimentation rate with a low change in the total thickness of the bed, around 0-2 x 10-9 m. The fine sediment type and the hydrodynamic conditions of transitional season with stronger winds and rainfall rate in Ciletuh Bay keeps sediment stirred in the water body, the water is pressured with a high sedimentation rate and a low deposition process to the seabed and this continuous process disturbs the visibility of the water, resulting in a low reproduction and metabolism process of biota that lives in it.