coastal management

Question 1

what is a sea wall?

Answer 1

-curved face which absorbs wave energy

Question 2

what are positives of a sea wall

Answer 2

• stops cliff erosion
  -good for economy

Question 3

what are negatives of a sea wall

Answer 3

• £6000 per wall
  -regular maintenance
  -visually intrusive

Question 4

what is rock armour

Answer 4

100s of rocks used to reduce wave power
-hard engineering

Question 5

positives of rock armour?

Answer 5

-social benefit
-cheaper
-easy to maintain

Question 6

negatives of rock armour?

Answer 6

-look messy
-dangerous

Question 7

what are groynes?

Answer 7

• they are wooden structures that stop longshore drift
  -they trap sediment and keep it on the beach
  -allows a steep beach to form

Question 8

positive of groins

Answer 8

-good for tourism
-economic benefit

Question 9

negative of groynes

Answer 9

-made of wood so need replacing when rotten
-regular maintenance

Question 10

what are revetments

Answer 10

-sloping structures that reduce erosion and wave energy

Question 11

positives of revetments

Answer 11

-protect coastlines
-easy to build

Question 12

negatives of revetments

Answer 12

need maintaining
-restrict beach access
-expensive
-need repairing when rotten

Question 13

what is dune stabilisation

Answer 13

-soft engineering
-stabilises large amounts of sand
and stops is being transported away

Question 14

positives of dune stabilisation

Answer 14

looks natural
-helps wildlife grow
-cheap
-sustainable

Question 15

negatives of dune stabilisation

Answer 15

-takes time
-cant be used for a while

Question 16

what is beach nourishment

Answer 16

–soft engineering
-sediment is taken by the waves so a high beach stops the energy of a wave

Question 17

positives of dune stabilisation

Answer 17

-attracts tourists-economic
-sand +pebbles protect coasts

Question 18

negatives of dune stabilisation

Answer 18

-will have to be repeated
-ruins underwater habitats

Question 19

what is cliff regrading

Answer 19

-soft engineering
-work is done to reduce angle of the cliff and collapsing
-drains the cliff to reduce risk of landslides and mass movement

Question 20

cliff regrading positives

Answer 20

-cheap
-material erodes away easily

Question 21

cliff regrading negatives

Answer 21

-causes retreat
-rock dries our and collapses
-loss of cliff

Question 22

what does hold the line mean

Answer 22

keep coastline where it is by stopping erosion

Question 23

what does advance the line mean

Answer 23

move the coastline further out to sea by creating new land

Question 24

what does managed retreat mean

Answer 24

-accept the cliff will recede over time
-relocate people, buildings, businesses

Question 25

what does do nothing mean

Answer 25

accept it will happen and let nature take it course