LSD, Waves, Storm Surge Flashcards
What is longshore drift?
Sand/sediment moving along the beach
What is swash?
The movement of sand/sediment up the beach by the wave
What is backwash?
movement of sand/sediment back down the beach by the wave
What are 5 features of destructive waves?
- Occur in storm conditions
- Have high energy
- Long fetch
- Greater backwash the swash
- Responsible for erosion
What are 5 features of constructive waves?
- Occur in calm conditions
- Have low energy
- Greater swash than backwash
- Responsible for deposition
- Transport material by longshore drift
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, the 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
What are 2 human reasons as why London is vulnerable to flooding?
- Large population
- Lots of building along the Thames
What is isostatic recovery?
The weight of the ice acted like a seesaw and pushed down Scotland and raised the South East. Now the weight of the ice has gone Scotland is rebounding and South East sinking back down
