Fluvial Landforms - Caused by Deposition (OCR GCSE Geography A (Geographical Themes)): Flashcards
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What is a floodplain?
What is a floodplain?
Area of land next to a river that can flood
What happens to material during a flood?
What happens to material during a flood?
Deposited as river loses speed and energy
Why are floodplains used for agriculture?
Why are floodplains used for agriculture?
Very fertile due to alluvium deposits
What is alluvium?
What is alluvium?
Deposited silt from a river flood
Where is an estuary located?
Where is an estuary located?
Where the river meets the sea
What forms in estuaries?
What forms in estuaries?
Mudflats from deposited silt
Fertility of estuary land?
Fertility of estuary land?
Not very fertile, unsuitable for agriculture
Where are deltas found?
Where are deltas found?
At the mouth of large rivers
How do deltas form?
How do deltas form?
River deposits material faster than sea can remove it
What happens to river energy near the sea?
What happens to river energy near the sea?
Loses energy and deposits material
Sediment sorting in deltas?
Sediment sorting in deltas?
Heaviest material deposited first
Effect of strong tides on deltas?
Effect of strong tides on deltas?
Can wash away sediment, preventing delta formation
What are levees?
What are levees?
Natural embankments along river edges
Where is heaviest material deposited (levees)?
Where is heaviest material deposited (levees)?
Closest to river channel as river slows
How do levees build up?
How do levees build up?
Material accumulates over time along channel edges