Fluvial Landforms - Caused by Deposition (AQA GCSE Geography): Flashcards
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15 cards from this deck
What is a floodplain?
What is a floodplain?
Area of land next to a river that can flood
What happens to material during a river flood
What happens to material during a river flood
Deposited as river loses speed and energy
Why floodplains are used for agriculture
Why floodplains are used for agriculture
Very fertile land from deposited sediment
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
Key feature of river in an estuary
Key feature of river in an estuary
Tidal (affected by sea tides)
What are mudflats?
What are mudflats?
Silt deposits in estuaries when water volume reduces
Is estuary land fertile?
Is estuary land fertile?
No - not very fertile, unsuitable for agriculture
Where deltas are found
Where deltas are found
At the mouth of large rivers
How deltas form
How deltas form
River deposits material faster than sea can remove it
Why rivers deposit material as they near the sea
Why rivers deposit material as they near the sea
River loses energy
How sediment is sorted in a delta
How sediment is sorted in a delta
Heaviest material deposited first
What can prevent delta formation
What can prevent delta formation
Strong tides washing away sediment
What are levees?
What are levees?
Natural embankments along river edges
Where heaviest material is deposited during a flood
Where heaviest material is deposited during a flood
Closest to river channel (forms levees)