Rivers - Depositional Landforms
- Created by: TomT254
- Created on: 31-01-16 13:22
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- Rivers - Depositional Landforms
- Braiding Channels
- Braiding occurs when a river is carrying a lot of eroded sediment
- If the rivers velocity drops or the sediment load becomes to much then it is deposited in the channel.
- This causes the river to divide into small, winding channels that will eventually re-join to form on channel.
- If the rivers velocity drops or the sediment load becomes to much then it is deposited in the channel.
- If the rivers velocity drops or the sediment load becomes to much then it is deposited in the channel.
- This causes the river to divide into small, winding channels that will eventually re-join to form on channel.
- Braiding occurs when a river is carrying a lot of eroded sediment
- Levees
- Levees are natural, raised embankments formed when a river overflows its banks.
- During a flood sediment in the river is deposited across the whole food plain as the river loses velocity and energy due to increased friction
- Levees are natural, raised embankments formed when a river overflows its banks.
- Heaviest material like sand and gravel is dropped first closest to the river channel.
- Over time, the material builds up on the river bank, creating a levee.
- Levees
- During a flood sediment in the river is deposited across the whole food plain as the river loses velocity and energy due to increased friction
- Heaviest material like sand and gravel is dropped first closest to the river channel.
- Over time, the material builds up on the river bank, creating a levee.
- Heaviest material like sand and gravel is dropped first closest to the river channel.
- During a flood sediment in the river is deposited across the whole food plain as the river loses velocity and energy due to increased friction
- Flood plains
- When a river overflows its banks and floods the flat lands either side of the river, there's an increase in the wetted perimeter and a reduction in the hydraulic radius.
- This increases friction, reducing the velocity of the river and causing fine silt and sand to be deposited across the flood plain.
- When a river overflows its banks and floods the flat lands either side of the river, there's an increase in the wetted perimeter and a reduction in the hydraulic radius.
- Braiding Channels
- Deltas
- As the river reaches a lake or sea, the energy is absorbed b the slower moving water.
- This causes the river to deposit its load, this then builds up on the sea bed until this rises above sea level partially blocking the mouth of the river.
- Deltas
- As the river reaches a lake or sea, the energy is absorbed b the slower moving water.
- This causes the river to deposit its load, this then builds up on the sea bed until this rises above sea level partially blocking the mouth of the river.
- Then river has to braid into several distributaries in order to reach the sea forming a delta.
- This causes the river to deposit its load, this then builds up on the sea bed until this rises above sea level partially blocking the mouth of the river.
- Rivers - Depositional Landforms
- Braiding Channels
- Braiding occurs when a river is carrying a lot of eroded sediment
- Braiding occurs when a river is carrying a lot of eroded sediment
- Flood plains
- This increases friction, reducing the velocity of the river and causing fine silt and sand to be deposited across the flood plain.
- This increases friction, reducing the velocity of the river and causing fine silt and sand to be deposited across the flood plain.
- Braiding Channels
- Then river has to braid into several distributaries in order to reach the sea forming a delta.
- As the river reaches a lake or sea, the energy is absorbed b the slower moving water.
- Deltas
- This causes the river to deposit its load, this then builds up on the sea bed until this rises above sea level partially blocking the mouth of the river.
- As the river reaches a lake or sea, the energy is absorbed b the slower moving water.
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