River Processes
- Created by: jodie.keaveney1
- Created on: 05-11-19 20:34
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- River Processes
- Erosion
- The process that wears away the river bed and banks. Also breaks up the rocks that are carried by the river
- Hydraulic action
- Air becomes trapped in cracks of the river bed and banks and causes rocks to break apart
- Abrasion
- When pebbles grind along the river banks in a sand papering effect
- Attrition
- When rocks that the river are carrying knock against each other. They break apart to become rounder and smaller.
- Solution
- When the water dissolves certain types of rocks e.g. limestone
- Transportation
- River picks up sediment and carries it downstream in different ways
- Traction
- Large pebbles rolled along river bed. Most common near the source of a river as the load is larger
- Solution
- Transport of dissolved chemicals. Varies along the river depending on the presence of soluble rocks
- Suspension
- Lighter sediment is carried within the water. Commonly near the mouth of the river
- Saltation
- Pebbles are bounced aling the river bed, commonly near the source
- Deposition
- When the river loses energy, it drops any material it has been carrying
- Factors leading to deposition
- Shallow water
- At the rivers mouth
- When the volume of the water decreases
- Drainage Basin
- Area of land around the river that is drained by the river and its tributaries
- Watershed
- The area of highland forming the edge of a river basin
- Source
- Where a river begins
- Confluence
- The point at which two rivers meet
- Mouth
- Where the river meets the sea
- Tributary
- A small river or stream that joins a larger river
- Channel
- This is where the river flows
- Erosion
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