LSD, Waves, Storm Surge, Isostatic Recovery Flashcards
What is Longshore drift?
Sand moving along the beach.
What is swash?
The movement of Sand up the beach by the wave.
What is backwash?
The movement of Sand back down the beach by the wave.
What are the 5 features of destructive waves?
- Occur in storm conditions have high energy
- Long fetch responsible for the erosion
- Greater backwash and a weaker swash.
- The waves are steep and close together.
What are the 5 features of constructive waves?
- Occur in calm conditions
- Have low energy transport material by Longshore drift
- Responsible for deposition
- Greater swash than backwash.
What 3 landforms are created by Longshore Drift
Spit, Bar, Tombolo.
Why is cornwall more vulnerable to coastal erosion?
Destructive waves and Long Fetch
.What is a storm surge?
Change in sea level that is caused by a storm
What causes a storm surge?
Low air pressure causes a bulge in the sea. Bulge is pushed forward by the wind.
If a storm surge happens during low tide coastal flooding is highly likely
True
What storm surge did we study?
December 2013
Why is the south-east coast of the UK more vulnerable to storm surges?
North sea, Funnel effect between UK and Europe
What are 2 physical reasons why London is vulnerable to flooding?
Storm surges, Narrowing of the land (funnel effect)
What are 2 human reasons why London is vulnerable to flooding?
Large population, Lots of buildings along the Thames.
What is isostatic recovery?
The weight of the ice acted like a see-saw and pushed down Scotland then raised the South East. Causing Scotland to rebound and then South East sinking back down.
