Coastal Management Case Studies
- Created by: charlia
- Created on: 29-04-15 09:54
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- Coastal Management
- Hard Engineering - Holderness
- Schemes used
- Eastern side of Spurn head is protected by Groynes and riprap
- Gabions protect Hornsea caravan park
- £2 million spent to protect Mappleton.
- Easington gas terminal protected by a revetment.
- Advantages
- Groynes trap sediment increasing width of beaches which protects the local area.
- Rip Rap are often seen as a more attractive form of hard engineering as they can blend into the environment
- The schemes are locally successful
- Schemes used
- Soft Engineering - Blackwater Estuary
- Schemes used
- Beach nourishment at Mersea Island
- Marsh stabilisation, planting stakes and brushwood on the water line encourages sediment to build up e.g. Ray Creek
- Coastal realignment at Orplands - sea wall breached, 40 hectares of farmland.
- Advantages
- More sustainable in the long term e.g. to repair the sea wall at orplands would've costed £600,000. 40 hectares valued at £600,000 - but marshland created will defend the coast for longer as it's self repairing
- Marshland provides habitats
- Lower environmental impact and economic cost than hard engineering schemes.
- Disadvantages
- Parts of the Orplands site are still bare mud and not marshland, which is very easy to erode. Grazing land has been lost.
- Beach nourishment requires a high amount of maintenance, without it the new sediment would be eroded just as the other sediment was e.g. at waikiki beach in hawaii in 2012 $2.2 million beach nourishment project but just a year after the replenished sand was gone.
- Marshlands can be quickly destroyed in times of high erosion e.g. storm surges
- Schemes used
- Hard Engineering - Holderness
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