Sediment transport model for sustainable dredging of the Barito River in Indonesia

The Barito River is the largest river in Indonesia with a discharge of 4,160 m 3 /second. The project objective is to deepen the port area of the Port Expansion to meet the minimum barge draft with a ship width of 28 m, ship draft 6.5 m and ship length 100 m. The estimated volume of dredging for an area 40 ha with an existing riverbed −13 mLWS is 2,500,000 BCM. Geotechnical dredging studies include slope stability analysis, bearing capacity of soil reinforcement and sampling of embankment material types. Bathymetry measurement method using multibeam Echosounder and Sub-Bottom Profiler. Dredging modeling uses DHI Mike Hydrodynamics and Mud Transport Module software. The ship uses a Cutter Suction Dredger type with capacity of 5,000 m 3 /day and Pelican Barge with capacity of 6,000 m 3 /day. The model input used is TSS and the percentage of 5 river sediment grain size classes in the Upstream, Middlestream and Downstream project locations. Scenario model dredging was carried out with 12 different scenarios in the installation of 2 silt curtains. With pollutant transport and geotechnical models, landslides and sediment distribution patterns can be mitigated.