River management
River Processes
Sediment systems
Sediment in aYou should note the following:
- Sand is easily transported at lower velocities.
- More velocity is needed to pick up material than to carry it in suspension.
- In times of highest discharge, velocity increases, as does erosion.
- The division between Transportation and deposition is small. This means that only a small decrease in velocity leads to sedimentation.
- Competence is the maximum size of material a river can transport.
- Capacity is the total load actually transported.
River load
Suspended sediment load:
This is carried with the body of the current. It can consist of suspended bed material, which is fine to medium sands, which have come from the riverbed. The material such as silts and clays is light and can be held in suspension.
Bedload:
Can be either exogenetic or endogenetic, and moves by sliding, saltating, or rolling. It is larger than suspended sediment load.
river comes from a variety of sources. It may be from outside the river (exogenetic) that includes, mass movement, rill and gully erosion and sheet wash.
Dissolved load:
This is held in solution and can come from erosion, pollution, mineral springs and chemical weathering.
- Created by: Emily
- Created on: 19-03-12 20:44
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