Dispersants have been used to neutralise the oil at Mumbai coast. Since Indian Coast Guard has been using dispersants to neutralise most of the oil patches to minimise the impact, only the left over oil will reach the coast. Regional Centre of National Institute of Oceanography, Mumbai is regularly collecting water samples to assess the impact of oil.
Oil Spill Modelling and trajectory prediction System of Integrated Coastal and Marine Area Management, (ICMAM) Project Directorate under the Ministry of Earth Sciences is used to generate likely trajectory scenarios for the prediction of movement of spilled oil, its spreading, direction, from sunken ship. Wind and Current are the primary factors responsible for spreading of oil. Tidal current and winds predominantly drive the patches.
In the model tidal current generated by ICMAM PD using Mike 21 software and winds predicted by NCMWRF have been used. In the model only oil from ship used and it does not account for Coast Guard intervention of using dispersants to neutralise the oil. Model outputs indicated that coastal waters and beaches around Juhu, Thane creek and also Uran are likely to be affected by the oil spill, provided that no dispersant to neutralise the oil is used.
Oil Spill Modelling and trajectory prediction System of Integrated Coastal and Marine Area Management, (ICMAM) Project Directorate under the Ministry of Earth Sciences is used to generate likely trajectory scenarios for the prediction of movement of spilled oil, its spreading, direction, from sunken ship. Wind and Current are the primary factors responsible for spreading of oil. Tidal current and winds predominantly drive the patches.
In the model tidal current generated by ICMAM PD using Mike 21 software and winds predicted by NCMWRF have been used. In the model only oil from ship used and it does not account for Coast Guard intervention of using dispersants to neutralise the oil. Model outputs indicated that coastal waters and beaches around Juhu, Thane creek and also Uran are likely to be affected by the oil spill, provided that no dispersant to neutralise the oil is used.
These information are provided to the Coast Guard time to time (since 7th Aug, 11) to combat the oil. Coast Guard spotted oil patches 7-8 NM off Mumbai harbour on 8th Aug 11. Most of the observed patches were found moving towards North West direction since 6 pm 8th Aug.11 which agrees with the model prediction. The situation of oil spill has changed now, since only 0.5 ton/hr spillage has been reported by the Coast Guard and oil is being neutralised.
It takes about 48 hrs for the untreated oil patches to reach the shore from the spill location. This will be a continuous situation at the current rate of leakage and prevailing wind and current conditions.
The Indian Coast Guard (ICG) reported spillage of approx 1-2 tonnes/hr of Diesel oil on 7th Aug, 11 onwards. The Fuel oil tanks are said to be intact and no leakage reported.
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