Hard engineering strategies
- Created by: Jenny Jones
- Created on: 08-04-14 16:08
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- Hard engineering strategies
- building artificial structures aimed at controlling natural processes
- Sea wall
- concrete/rock barrier placed at top of beach or foot of cliffs
- has a curved face to reflect the waves back into sea
- Advantages
- works at stopping the sea
- often has a walkway for people to walk along
- Disadvantages
- can be unnatural to look at
- very expensive and has high maintenance costs
- Groynes
- trap sediments being moved by longshore drift, therefore enlarging beach
- timber/rock structures built out to sea from coast.
- Advantages
- result in bigger beach which can improve tourism
- not too expensive
- Disadvantages
- groynes are unnatural and rock groynes can be unnattractive
- often lead to increased rates of erosion elsewhere
- Rock armour
- piles of large boulders dumped at foot of a cliff
- the rocks absorb the energy of the waves protecting the cliffs
- Advantages
- fairly cheap and easy to maintain
- often used for fishing and can provide interest to coast
- Disadvantages
- rocks can be expensive to transport as are sometimes from abroad
- can be obtrusive
- Channel straightening
- a river's course is straightened
- meanders are cut out by building artificial straight channels
- Advantages
- water moves out of an area more quickly because it doesn't travel as far- reducing the riisk of flooding
- Disadvantages
- flooding may happen downstream of straightened channel instead as flood water is carried there faster
- more erosion downstream bc water is flowing faster
- flooding may happen downstream of straightened channel instead as flood water is carried there faster
- timber/rock structures built out to sea from coast.
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