MODELING PORT STRUCTURE IMPACT TO SEDIMENTATION PATTERN IN TUDI BAY, PROVINCE OF GORONTALO, INDONESIA

Abstract

: Numerical modeling using Surface-water Modelling System (SMS) is carried out to simulate
the hydrodynamic and sediment transport pattern in Monano Bay, Gorontalo Province, Indonesia. The model
applies scenarios of the existing bay before and after berthing structures development. Field data acquisition
and secondary data collection are carried out to complete the model. The field measurement includes
bathymetry, tide elevation, and current velocity measurements. Validation of the model and field
measurement shows good agreement. The validated parameters are the tidal elevation and velocity data. The
model shows that in flood and ebb condition, the current flows to the south-east and north-west direction,
respectively. The velocity is in the range of 0.1 – 0.25 m/s. The sedimentation modeling shows that the
seabed changes are not significant for model scenarios before and after the port development. It is found that
the potential increment of sedimentation in Monano Bay with berthing structure being there is about 10 – 15
cm in a one-year simulation.