The study looked at how sediment moves in the offshore area of the Changjiang estuary in China. They found that sediment concentration varies a lot in this area, with higher levels in the west and south. Sediment levels decrease from west to east, and are higher during spring tides. Sediment tends to settle at the bottom due to water movement, creating zones of high sediment concentration in the south and north. The study also found that sediment concentration increases with vertical mixing. Overall, the research shows that sediment distribution in this area is influenced by factors like runoff, tides, and topography.