hard engineering Flashcards
1
Q
what is a sea wall
A
a concrete wall placed at the foot of a cliff with a curved face to reflect waves
2
Q
+ of sea wall
A
- provides a physical barrier
- often a promenande for tourists to walk
3
Q
- of sea wall
A
- must have contunious face, any gaps will be exploited
- needs a drain outlet
- in-natural
- expensive and high maintaince
4
Q
example and cost of sea wall
A
Morecombe bay, £6,000 per metre
5
Q
what Is a groyne
A
wooden or stone structure built at 90 degrees, aims to control LSD
6
Q
+ of groyne
A
- increases tourist potential
- works with natural prcoesses
7
Q
- of groynes
A
- halting LSD has effects down the coast
- starve beaches of sediment
- in-natural
8
Q
example and cost of groynes
A
Blyth beach, £5,000-10, 000 each
9
Q
what is a gabion
A
wire cages with small rocks which support weak cliffs
10
Q
+of gabions
A
- inexpensive
- encourages upper beach stability
- may blend in with natural environemtn
11
Q
- of gabions
A
- unslighly
- metal cage can rust and be dangerous
12
Q
example and cost of gabions
A
Morecombe bay, £5,000-50,000 per 100m
13
Q
what is rock armour
A
large boulders dumped infront of a cliff
14
Q
+ of rock armour
A
- chea and easy to contrast
- often used for fishing/sunbathing
15
Q
- of rock armour
A
intrustive
- dangerious
- usually from abroad
