OIL SPILL MODELING IN THE BALIKPAPAN BAY CASE STUDY: INCIDENT OF 31 MARCH 2018
The oil spill incident occurred at the end of March 2018 has polluted Balikpapan Bay. Based on the satellite image, it can be seen that in two days, the spill has reached the upstream area of the bay and also in the Makassar Strait. In order to give a more detailed look at the movement and change...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/50664 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The oil spill incident occurred at the end of March 2018 has polluted Balikpapan
Bay. Based on the satellite image, it can be seen that in two days, the spill has
reached the upstream area of the bay and also in the Makassar Strait. In order to
give a more detailed look at the movement and changes in the characteristics of the
oil spill, this study uses the oil spill model (OpenOil) in which the input data such
as current velocity is generated from the 3-D Regional Ocean Modeling System
(ROMS). Meanwhile, wind speed data uses a global dataset from the European
Centre for Medium-Range Weather Forecasts (ECMWF) ERA-5 that has been
subsetted according to the domain model of Balikpapan Bay.
Elevation data from the hydrodynamic model are compared to the tides observation
of Geospatial Information Agency (BIG) database at Semayang Port, Balikpapan.
Root Mean Squared Error (RMSE), Mean Absolute Percentaged Error (MAPE),
and model skill are used as verification methods where the results for each method
are 8.8 cm, 9.5% and 0.9, which shows the difference is not too far between the
simulation results and the observational data. From the simulation results, it is
known that the depth-integrated current has a maximum value of about 1.08 m·s-1
and the average is about 0.17 m·s-1 of the entire model domain that occurs in ebb
tide and flood tide conditions.
The results of the oil spill model show the spreading pattern of oil particles
following the pattern of tidal current in Balikpapan Bay. The oil particles are seen
to spread rapidly in the ebb tide and flood tide conditions. The coastal area of
Penajam Pasir Utara and Balikpapan is affected by the oil spill after 12 hours and
36 hours after the incident. The simulation also shows that as much as 2.5 million
kg of the total mass of oil spilled has been lost only due to the evaporation process
which occurred 18 hours after the incident
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