activity 3

River deposition

• If sediment gets moved to the lower velocity part of the stream, they will be deposited.
• What may cause river deposition?
• There is not enough water to transport the load (dry season)
• A river flows across a desert where there is a high rate of evaporation.
• A river flows across permeable rocks which allow water to infiltrate into the underlying rocks.
• A river carries a larger load than it can transport.

Depositional features

Meanders.

• A meander is a bend in a stream. Meanders grow both laterally and in the down stream direction.
• A point bar forms on the inside bank of a meander and rising from the channel as an accumulation of alluvium

Illustrations of meanders.

Braided channels

• a wide and shallow channel consisting of a tangled network of diverging minor channels separated from each other by low sandbanks and islands of alluvium.