Flashcards in LSD, Waves, Storm Surge, Isostatic Recovery Deck (18)
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?
The movement of Sand/Sediment back down the beach by the wave.
What are the 5 features of destructive waves?
-Occur in storm conditions
have high energy,
-Long fetch (travelled a long distance)
-Responsible for erosion
-Greater backwash than swash.
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
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.
What happens if a storm surge hits during high tide?
Flooding is highly likely
What storm surge did we look study?
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?
-Narrowing of the land (funnel effect)
What are 2 human reasons why London is vulnerable to flooding
-Lots of buildings along the Thames
What is isostatic recovery?
The weight of the ice acted like a sea-saw and pushed down Scotland and raised the South East. Now that the weight of the ice has gone Scotland is rebounding and the South East sinking back down.
How has London attempted to reduce the threat of flooding?
Give 5 hard engineering strategies to manage the coast