The Sea Flashcards
1
Q
What are the characteristics of a destructive wave?
A
- Weak Swash
- Strong Backwash
2
Q
What are the 4 ways that the sea erodes the coast
A
- Hydraulic Action
- Air Compression
- Abrasion
- Attrition
3
Q
What are the characteristics of a constructive wave?
A
- Strong Swash
- Weak Backwash
4
Q
What are sea walls?
A
Concrete walls with curved tops to deflect the waves back to sea
5
Q
What are groynes?
A
Low walls built of wood, built at a right angle to the sea to prevent sand being moved by longshore drift
6
Q
What are gallions?
A
Wire cages filled with small stones in front of beaches or sand dunes. They break the power of the waves and slow down erosion
