13096700
Description
Mind Map by Daire Ní Mhothlaigh, updated more than 1 year ago
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Coastlines 1
- KEY WORDS
- Fetch - The distance that the wave has
travelled
- Swash - Where the wave comes
in
- Backwash - Where the wave goes back
out
- Constructive Wave - Gentle waves that create things by depositing
material
- Destructive Wave - Where strong waves damage something and causes erosion
- Fetch - The distance that the wave has
travelled
- CONSTRUCTIVE WAVE -->
- 1. Low wave height
2. Long wave length
3. Powerful
swash-pushes
material up the
beach 4. Weak
backwash
- 1. Low wave height
2. Long wave length
3. Powerful
swash-pushes
material up the
beach 4. Weak
backwash
- DESTRUCTIVE WAVE
- 1. High
wave
height 2.
Short wave
length 3.
Weak
swash -
pushes
material up
the beach
4.
Powerful
backwash
- 1. High
wave
height 2.
Short wave
length 3.
Weak
swash -
pushes
material up
the beach
4.
Powerful
backwash
- EROSION
- Hydraulic Action - Sheer force of the water erodes banks
etc.
- Attrition - Rocks and pebbles collide with each other and get
smaller
- Corrasion - Material carried by the water erodes the
coastline
- Corrosion - Chemicals in the water erode the
coastline
- Hydraulic Action - Sheer force of the water erodes banks
etc.
- TRANSPORTATION
- Traction - Big rocks roll along the sea
bed
- Saltation - Material bounces along the sea
bed
- Suspension - Material floats in the
water
- Solution - Material dissolved in the
water
- Traction - Big rocks roll along the sea
bed
- LONGSHORE DRIFT -->
- The waves come in at an angle, however the backwash is always at a
90º angle due to gravity. Therefore, this process is repeated and
material is carried down the beach in the opposite direction of the
prevailing winds
- The waves come in at an angle, however the backwash is always at a
90º angle due to gravity. Therefore, this process is repeated and
material is carried down the beach in the opposite direction of the
prevailing winds
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