Zusammenfassung der Ressource
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
- CONSTRUCTIVE WAVE -->
- 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
- 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
- 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
- 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