River Landforms
- Created by: [email protected]
- Created on: 17-04-19 17:53
View mindmap
- River Landforms
- River Basin
- Area of land surrounding a river.
- Tributary- smaller river that joins the main one.
- Source- the start of the river.
- Mouth- where it meets the sea.
- V-Shaped Valleys
- Vertical Erosion
- Upper course of the river.
- Valley sides exposed to weathering.
- Not enough energy for lateral erosion.
- Waterfalls and Gorges
- Upper course of the river.
- Section of softer rock eroded creating a step.
- Water goes over the step and erodes it to make it steeper.
- Hard rock undercut and collapses.
- When it collapses, it leaves steep sides which forms a gorge.
- Meanders
- Erosion and deposition on a river.
- Current on the outside of the bend is faster. More erosion on the outside of the bend.
- Current slower on the inside- material deposited, forming slip-off slopes.
- Oxbow Lakes
- Caused by a meander getting larger and joining up,
- Erosion causes outside bends to get closer.
- River eventually breaks through.
- Water takes the shortest path.
- Deposition cuts off the meander, leaving an oxbow lake.
- Floodplains
- Flat areas of land that flood.
- Floodplain gets higher when the river floods.
- Deposition on slip off slopes also builds up the floodplain.
- Levees
- Natural embankment on the edge of a river.
- Forms during a flood - heavier material dropped closest to river.
- River Basin
Comments
No comments have yet been made