Hard engineering structures Flashcards
1
Q
How does a sea wall work, what the cost and disadvantages?
A
Reflects waves back out to sea, preventing erosion of the coast. Acts as a barrier to prevent flooding
Expensive to build and maintain
Creates strong backwash which erodes under the wall
2
Q
How do Gabions work, what the cost and disadvantages?
A
Rock filled cages at the foot of cliffs and absorbs wave energy and reduces erosion.
Cheap
Ugly
3
Q
How do breakwaters work, what’s the cost and disadvantages?
A
Concrete blocks deposited off the coast. Force waves to break offshore. Waves energy and erosive power is reduced
Expensive
Can be damaged in storms
