GPHY 102 Lecture Notes - Lecture 17: Stream Bed, Hydraulic Action, Sediment Transport

• School: Queen's University
• Department: Geography
• Course: GPHY 102
• Professor: Dr.Trezino

Document Summary

Stream erosion is the progressive removal of mineral material from the floor and sides of the channel, whether bedrock or regolith. Stream transportation consists of movement of the eroded particles dragged over the stream bed, suspended in the body of the stream, or held in solution as ions. Stream deposition is the accumulation of transported particles on the stream bed and flood plain or on the floor of a lake, where it may be temporarily held until it is carried to the oceans. Erosion by streamflow (cid:149) erosional capacity of streams is much greater than overland flow due to: Transport of material in water that is abrasive and causes erosion of the channel bed (suspended sediments, rocks, etc. ). Also referred to as hydraulic action. (cid:149) erosional capacity of streams depends on: Stream load refers to the materials carried or transported by a stream.