Avulsion (river)
Videos
In sedimentary geology and fluvial geomorphology, avulsion is the process by which flow is diverted out of an established river channel and into a new course via a bifurcation, or splitting of the cha
Plumes of sediment enter the ocean from several mouths of the Mississippi River bird's-foot delta. This sediment is responsible for building the delta and allowing it to advance into the sea. As it extends further offshore, the channel slope will decrease and its bed will aggrade, promoting an avulsion.
Fernando noronha
River delta
Videos
A river delta is a landform, typically triangular, created by the deposition of the sediments that are carried by the waters of a river, where the river merges with a body of slow-moving water or with
Avulsion (river)
…a bifurcation, and channel obstructions such as wood or beaver dams can also influence the rate and progression of avulsions. Avulsions are common in river deltas, where sediment deposits as the river enters the ocean and channel gradients are typically very small. This process is also known as delta switching…
A satellite perspective of the Amazon Delta, in South America.
Sacramento–San Joaquin River Delta in California at flood stage, early March 2009
Delta lobe switching in the Mississippi River Delta, 4600 yrs BP, 3500 yrs BP, 2800 yrs BP, 1000 yrs BP, 300 yrs BP, 500 yrs BP,× current
The Ganges Delta in India and Bangladesh is the largest delta in the world, and one of the most fertile regions in the world.