Coastal Sea Defences 0.0 / 5 ? GeographyCoastal zonesGCSEAQA Created by: user123Created on: 14-05-18 16:58 What are seawalls? Concrete barriers that deflect waves 1 of 31 What do seawalls usually have? curved faces 2 of 31 Are seawalls hard or soft engineering? hard 3 of 31 What is one advantage of sea walls? they are effective 4 of 31 What is one disadvantage of seawalls? Expensive to build and maintain 5 of 31 what do gryones do? trap sediment being moved by LSD. 6 of 31 Are gryones hard or soft? hard 7 of 31 What is one advantage of gryones? create wider beaches for tourists 8 of 31 What are 2 disadvantages of gryones? Look unattractive & create uneven beaches 9 of 31 What are gabions? Wire cages filled with rocks 10 of 31 What do gabions act as? Buffer to the sea and absorb wave energy 11 of 31 What is one advantage of gabions? cheap to produce 12 of 31 What is one disadvantage of gabions? ugly until vegetation grows 13 of 31 Are gabions a type of hard or soft engineering? hard 14 of 31 What is rock armour? Piles of boulders dropped at cliff base 15 of 31 What is an advantage of rock armour? Cheap and easy to maintain 16 of 31 What is a disadvantage of rock armour? cant restrict acess 17 of 31 Is rock armour hard or soft engineering? hard 18 of 31 What is beach nourishment? adding shingle or sand to an existing beach 19 of 31 What is an advantage of beach nourishment easy to do 20 of 31 What type of engineering is beach nourishment soft 21 of 31 what is a disadvantage of beach nourishment? needs constant maintenance 22 of 31 What is dune regeneration? Natural features act as buffers to sea 23 of 31 What is an advantage to dune regeneration? relitavely cheap 24 of 31 What type of engineering is dune regeneration soft 25 of 31 What is a disadvantage of dune regeneration? time consuming to plant the marram grass 26 of 31 What is dune fencing? fencing constructed on seward face of sand dunes 27 of 31 What does dune fencing do? encourage new sand dunes to form and protect existing ones 28 of 31 What is an advantage of dune fencing? minimal impact on natural systems 29 of 31 What type of engineering is dune fencing? soft 30 of 31 What is a disadvantage of dune fencing? regular maintenance needed 31 of 31
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