coasts Flashcards
(28 cards)
fetch
The distance a wave travels and develops
mass movement
When soil, rocks, and stones slip, slide or slump down a slope.
hydraulic action
Waves crash against the cliff, forcing air and water into cracks, splitting them open
abrasion
Sand/pebbles are used to RUB against the landscape to wear it away
corrosion/solution
Soluble rock types are ‘dissolved’
attrition
Rocks HIT against each other making them smaller and more rounded.
chemical weathering
When acids/ salt in water dissolve rock
biological weathering
when tree roots widen cracks in rocks
physical weathering
When rock is broken into smaller pieces by processes such as e.g freeze thaw
longshore drift
Zig-zag movement of material along a coast
swaah
The flow of water up the beach at the same angle as the wind
backwash
The flow of water back into the sea at right angles to the beach
traction
Larger boulders rolled along
saltation
Smaller pebbles bounce along
suspension
Very small sediment floats
solution
Tiny particles are dissolved
beach profile
The cross sectional shape of a beach
hard engineering
Man made structures used to protect the coastline
soft engineering
Natural methods used to protect the coastline
inter-tidal zone
The part of the shoreline that is between high and low tide.
retreat the line
Allow land to flood naturally and the coastline to move inland.
hold the line
Use hard enginering to prevent flooding and kep the current position of the
advance the line
Build new coastal defences further out to sea away to create a new coastline
shoreline management plan
report by councils to way up the benefits and costs of installing sea defences.
