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Coasts (What I got from my textbok (Sediment (Much of the beaches load is…
Coasts
What I got from my textbok
Sediment
Much of the beaches load is made up of
sediment
Swash
deposits
sediment on beaches
Backwash
erodes
sediment from beaches
Features of
constructive waves
Gently sloping wave front
Wave crests far apart
Gentle sloping beach
Features of
destructive waves
Waves close together
Steep wave front
Steep beach
Case Studys
Great Barrier Reef n Australia
Deposition in New Zealand
Spits (extended)
Spits that extended into sea form bars which then form lagoons
Mangroves
Grow in warm waters
Have
silt roots
for support
Coral Reefes
Community of marine organisisms
Most reefs grow in warm waters
Types of reefs
Barrier reefs
Atoll reefs
Fringing reefs
What I remember from Year 8
Types of waves
Constructive
Stronger SWASH
Weaker BACKWASH
Destructive
Stronger BACKWASH
Weaker SWASH
Factors that determine the size of a wave
Length of fetch
Energy
Strength of wind
Erosion processes
Hydracloric action
Solution
Attrition
Corrosion
Landforms created by Coastal Erosion
Headland
Bay
Wave-cut notch
Stumps
Wave-cut platform
Coastal Transportation
Longshore Drift
Prevailing wind
Sediment
Zig-zag motion
Direction
Swash and Backwash
Spit
What I got from the internet
Coastal management
Hard engineering
Groynes
Adantage: Helps to stop Longshore Drift
Disadvantage: May cause problems somewhere else, because they starve beaches of sediment
Soft engineering
Managed retreat
Advantages: Land becomes marsh, slowing waves and reducing erosion
Disadvantage: Land is lost