ANALYSIS OF COASTAL EROSION AT MIRI CRUDE OIL TERMINAL

Miri Crude Oil Tenninal (MCOT) is located at Miri Coastline in Sarawak. MCOT is
operated by PETRONAS Carigali Sdn. Bhd., Sarawak Operations. It provides
facilities to store crude oil form offshore platforms and then will be transported to
refinery plant via vessels. Coastal erosion occurs along Miri-Kuala Bararn coastline;
hence the water margin is retreating to the mainland and affecting stability of MCOT
facilities. Timber logs and debris drift to the shore and become a threat to the
pipelines and facilities along the coast. This research presents numerical modeling for
analysis of coastal erosion problem at MCOT using MIKE 21 and LITPACK. The
coastline is subjected to longshore erosion due to currents action during High Water.
In this research, the suitability of coastal protection that can incorporate risk and
uncertainty as well as evaluate tradeoffs between risk and economic returns are
explored. A series of Groynes are recommended to be constructed perpendicular to
the shoreline to trap littoral drift and stabilize the coast. A rock bund is proposed for
protection against timber logs and debris. Beach nourishment is to replace the
sediment on the beach which is lost through littoral drift. This combination system
will cost RM 23 Million mainly for Detailed Engineering Design and Construction;
however it will provide long term solution to this coastal erosion problem.