Bar (river morphology)

[1][2] These types of river systems are associated with high slope, sediment supply, stream power, shear stress, and bed load transport rates.

[2] Braided rivers have complex and unpredictable channel patterns, and sediment size tends to vary among streams.

Eventually the logjam can become partially buried, which protects the island from erosion, allowing for vegetation to begin to grow, and stabilize the area even further.

Over time, the bar can eventually attach to one side of the channel bank and merge into the flood plain.

Here, at the deepest and fastest part of the stream is the cut bank, the area of a meandering river channel that continuously undergoes erosion.

[4] Over a long enough period of time, the combination of deposition along point bars, and erosion along cut banks can lead to the formation of an oxbow lake.

This pressure creates erosion on that face of the bar, allowing the flow to transport this sediment over or around, and re-deposit it farther downstream, closer to the ocean.

Point bar at a river meander: the Cirque de la Madeleine in the Gorges de l'Ardèche , France.
Gravel bar in the American River , Washington , United States.