Fluvial (adjective)

1. Relating to or formed by a river or streams.
2. Of or relating to rivers or the study of rivers.

Origin:

From latin fluvius, meaning "river".

Examples:

1. The geologist studied the fluvial deposits in the riverbed.
2. Fluvial erosion had caused the river to change its course over time.
3. Fluvial transport is the movement of sediment by rivers.
4. Fluvial processes have shaped the landscape over millions of years.
5. The fluvial system of the Amazon is one of the largest in the world.