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Hengistbury Head - Coggle Diagram
Hengistbury Head
Long groyne
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The groyne was constructed between 1937- 1939 and is critical to controlling coastal erosion in Poole and Christchurch Bays
So successful that the sea never reaches the base of the cliff even in storms, and a dune ecosystem has developed here.
Without the long groyne, beach material would rapidly wash away and the cliffs could start to erode again within a year
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The groyne will be raised in height to help provide protection for the next 100 years from predicted sea level rise
Beach nourishment
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Since the mid 70s beach nourishment has been a method used to add material to the beaches along this area.
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Why protect it?
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Waves are strong in this area due to the direction of the prevailing wind- longshore drift moves material easily
Over 40 habitat categories have been identified e.g. heathland, freshwater pond, saltmarsh etc
Gabion cages
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The cages protect the headland as they take the power out of the waves so the impact of erosion is not as severe
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Rock groyne
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Rock groyne as they last longer than timber (wooden) groynes and they are vital in preventing the longshore drift occurring in the area so the beach remains in place.
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