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4.a. Intentional change Sandbanks, Dorset - Coggle Diagram
4.a. Intentional change Sandbanks, Dorset
Why
Pool Harbour
Clear entrance must be maintained for ferries, commercial ships and catamarans
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Sea level rise could cut the peninsula off from the mainland resulting in £18m in damages to residential properties alone
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Management strategies
beach nourishment
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2005 - 2008, 1.8 million m3 of beach material
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However, cheaper methods being used (£3 per m3)
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Groynes
The groynes prevent sediment from entering the harbour entrance, absorb wave energy to reduce erosion
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100 wooden groynes at £25,000 each
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Consequences
Normally areas with constructive waves will eventually create steeper beaches by building ups sediment where waves develop
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Benefits
Shoreline Management Plan (SMP) protects 3,114 residential and 109 commercial properties at risk of coastal erosion
Maintainance of Poole Harbour ensures commercial ships and ferries can still use the area, allowing for income through trade and ferrying
Tourist industry is worth £440 million a year, bigger beaches will promote and increase tourism and there will be economic benefit