Management strategies

• There has been construction of 4 new rock groynes in addition to the 8, already existing, wooden one’s
• These groynes help to minimise the movement of sediment via longshore drift, which ensures sediement does not block the harbour entrance, thereby allowing access for ships to move freely
• The groynes also absorb wave energy and reduce rates of erosion by raising the beach profile; without groynes, erosion rates would be 80% higher
• Beach recharge also conserves the beach profile - sand is dredged and ‘rainbowed’ onto the beach which costs £20 per square metre, but, offshore dumping has now been preferred as it cost 6x less and works with the natural processes
• However, a review in 2018 suggested that only 3% of the 30,000 metres squared of sediment dumped off-shore had reached the beach after 18 months - suggests ineffectiveness ?
• In total, 3.5 million metres squared of sediment has been added to Poole bay which raises the beach profile, which absorbs wave energy, and therefore reduces the rates of erosion
• There is also a 2.4km long sea wall which deflects waves at a high tide, therefore reducing rates of erosion