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The largest input of sediment into the coastal ocean is by rivers,of which most enters as suspended sediment.The sediment-laden river waters often enter riding within the turbulence of a surface plume wherein sediment rains out of the plume into the marine waters below and where flocs form quickly and settle through the water column subject to other sedimentation processes(e.g.differential settling,shear,zooplankton ingestion,bacterial growth,plankton interaction).