Knowra Bedrock river Bedrock river A river whose channel is cut into exposed bedrock rather than formed primarily in loose sediment. Its shape and evolution reflect interactions among flowing water, sediment, and rock resistance.
Fluvial incision : The downward erosion of a river channel into its bed by flowing water and transported sediment. It is the central process by which a bedrock river deepens its channel.
Sediment transport : The movement of mineral and organic particles by water, wind, ice, or gravity. Transported sediment both abrades bedrock and can cover it, altering erosion.
River incision : The lowering of a river channel by erosion of its bed. Incision measurements help reconstruct how quickly a bedrock river cuts downward.
Alluvial river : A river whose channel is formed and maintained mainly by sediment deposited and reworked by the river. Its bed and banks consist chiefly of mobile sediment, unlike exposed bedrock channels.
Stream power law : A family of equations relating river incision rate to channel slope and drainage area or discharge. These equations simplify bedrock incision, but their assumptions remain debated.
Stream power : The rate at which flowing water expends energy against a channel bed and banks. Greater stream power can increase the river’s capacity to erode bedrock.
Hydraulic geometry : Relationships linking a river’s discharge to its width, depth, velocity, and slope. Channel dimensions and flow conditions shape the forces acting on the bed.
River terrace : A step-like landform beside a river, marking a former floodplain or channel level. Terraces record periods of incision and changing river elevation.
Bedrock canyon : A deep, narrow valley carved into bedrock by a river or other erosive processes. A canyon is a common valley form produced by sustained bedrock river incision.
Erosion threshold : A minimum force or flow condition that must be exceeded for measurable erosion to occur. Whether incision has a sharp threshold affects predictions of channel response to flow.
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