2 DIMENTIONAL MODEL OF PARTICLES TRAJECTORY IN PARI ISLAND – SERIBU ISLANDS

• Main Author: Nahwan Tsani, Ragis
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/44795
• Institution: Institut Teknologi Bandung

Pari Island is one of the islands in the Seribu Islands, North Jakarta. The high activity in Pari Island caused the waters vulnerable to pollution of the environment, such as waste and oil spills. The purpose of this final project is to analyze the pattern of flow and movement of particles from the coastal area Pari Island. Hydrodynamic simulations using Hamburg Shelf Ocean Model (HAMSOM) carried by the driving force of tides and wind. The resulting stream of hydrodynamic model simulations are then used as input model of particle trajectory simulated second time on 16 October to 14 November 2015 and 16 March to 14 April 2016. Free directions u and v hydrodynamic simulation results in November 2015 shows the correlation of the data observation of 32% and 60.7%, while in April 2016 by 76% and 59.3% for stations further away from the cluster of coral. The correlation value indicates that the hydrodynamic model simulated well enough in describing the current conditions in the waters of Pulau Pari. Water flow pattern in Pari Island is influenced by seasonal weather conditions, especially when the neap. In November, the dominant flow leads to the Southwest with a maximum speed of 1 m/s, while in April the dominant flow to the east with a maximum speed of 0.8 m/s. Flow is also affected by the tidal conditions (tide), especially when it is full, even though the wind was moving westward toward the tide when the current is moving towards the Northeast Line trace particle simulation model of the trajectory in five locations in November 2015 and two locations in the month of March 2016 showed suitability direction of motion with the measurement results drifter, but the distance of particle displacement model results in November 2015 was smaller than the observation that distance moving average is 1.94 km for 3 hours at a speed of 0.18 m/s, while the observations drifter move as far as 3.8 km with a speed of 0.35 m/s. The simulation results show the trajectory of the month April 2016 the average displacement distance greater that 1.37 km for 40 minutes at a speed of 0.57 m/s, while moving drifter observations so far of 0.57 km for 40 minutes with a speed of 0.24 m/s. In one tidal cycle experienced particles back and forth movements, ie when the tide moves towards the East and then turn to the West when it receded, but the particles are not back to the starting position (not closed).