Landforms of fluvial erosion and deposition
- Created by: Brad_ers_B
- Created on: 11-05-14 13:46
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- Landforms of fluvial erosion and deposition
- Waterfalls and rapids
- Sudden change in gradient of river flowing downstream
- Can be a result of:
- Resistand band of rock occuring across the course of a river
- Edge of a plateau
- Rejuvenation of the area
- High Force in upper Teesdale
- Potholes
- Cylindrical holes drilled into the rocky bed of a river by a turbulent high-velocity water loaded with pebbles
- Pebbles become trapped in slight hollows and vertical eddies in water
- Grinds by abrasion and attrition rounds and smooths pebbles caught reducing bedload
- Braided channel
- When a river is forces to split into several channels separated by islands
- Mainly in rivers with large loads of sand and gravel
- Happens with variable discharges
- Meanders
- Sinuous bends in a river
- Created by alternating pools and riffles
- Inner bank = Point Bar
- Oxbow lakes
- A feature of both erosion and deposition
- Use a diagram to explain
- Levées
- If a river floods the velocity of water falls as it overflows banks
- Results in deposition leaving raised banks on the sides of channels
- More flooding = Bigger banks and Bigger Banks= better flooding defence
- Delta
- Feature of deposition at the mouth of a river into the sea or a lake
- It occurs as the river energy decreases and dumps suspended material and anything carried
- Waterfalls and rapids
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