Modeling of Plastic Waste Particle Trajectories Jakarta Bay 2015

• Main Author: Apriyanta Winardi, Edwin
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/33070
• Institution: Institut Teknologi Bandung

Plastic waste is one of the threats to the marine ecosystem, including in Jakarta Bay. DKI Jakarta Province with a population density of 15.366,87 inhabitants / m2, can be indicated by at large number of human activities on land that produce solid waste that enters the Jakarta Bay through rivers. 13 rivers flow into the Jakarta Bay, and the 13 rivers are heavily polluted. In this study, modeling the movement of plastic waste in the Jakarta Bay using the numerical modeling of the Hamburg Shelf Ocean Model (HAMSOM) in June and December 2015 with tidal and wind generating force. The bathymetry used was bathymetry in 2015. After conducted hydrodynamics simulation, the trajectories simulation of plastic waste is simulated in June adn December 2015 with the source of plastic waste sourced from 9 estuary. The nine rivers represent 13 rives that flow into the Jakarta Bay. The simulation results in June 2015 shows the hydrodynamic conditions in Jakarta Bay. The value of elevation correlation around Bidadari Island, Jakarta Bay, the hydrodynamic results of tidal models with tide forecasting from the Geospatial Information Agency (BIG) which is 96.04% with Root Mean Square (RMSE) of 2.75 cm, while elevation tidal and wind simulation results with BIG tide forecasting have a correlation of 96.02% with RMSE 2.75 cm. The direction of the average flow to the northwest on June 2 - 6, 2015, both field measurements or simulation results with a speed of 0.02 - 0.06 m / s. The hydrodynamic simulation results with tidal power generation and average winds in June 2015 show that the average current movement during June 2015 moves west to northwest, while the average flow in December 2015 moves east. The particle trajectory in the east monsoon shows that around 68.51% of the particles released, move west from their initial position and around 99.01% of the particles move east from their initial position in the west monsoon. The movement of plastic particles released in the trajectory simulation shows that the movement is relatively parallel to the coastline and is relatively close to the coastline. Movement of particles that are relatively in the direction of the wind can cause plastic particles to be inside the bay throughout the year and not move to open seas. In June 2015, as much as 12.5 tons of plastic waste were scattered around Koja to Dadap with the densest plastic waste around the C island. In December, plastic waste spread from Angke to Karawang and the densest distribution of waste in the Angke – Pluit estuary, N island, Bekasi estuary, and Karawang.