Sandbanks

Question 1

Location of Sandbank

Answer 1

Neighbourhood of Poole, Dorset

Situated on a spit on the South Coast of England

Extends into Poole Harbour and separates it from the English channel

Part of the Jurassic Coast

Question 2

The need for management at Sandbanks

Answer 2

High-value commercial properties in the area - provide significant employment opportunities and better the economy

Residential properties - Large, detached houses with prices excess of £10 million

Major tourist attraction - further benefits the economy

Provides protection and shelter from waves for Poole harbour

The narrow entrance into Poole Harbour will become clogged and shallow if LSD continues, blocking needed cargo ships and ferries

Climate change means that sea levels are predicted to rise by about 0.6 m in the next 100 years, flooding and damaging many off the properties which are around 2 m above sea level - estimated £18 million to residential properties in next 20 years

Question 3

Management strategies - Groynes

Answer 3

Minimise longshore drift by interrupting the flow of sediment and maintaining a wider beach which acts as a buffer against wave energy

prevents harbour siltation which restricts sediment from entering Poole Harbour, ensuring clear access for shipping

13 wooden groynes implemented in 1896-98 - needed constant repairs and enhancements

mid 1990’s - switch to rock groynes for durability
2000-01 - additional built

erosion would otherwise be 1 metre per year

Question 4

Management strategies - Beach Replenishment

Answer 4

Wider beaches dissipate the wave energy which protects the inland areas

by having a healthy beach you increase tourism and local recreation which benefits the economy

Sand is dredged offshore and deposited onto the beach

“Rainbowing” has been empoyed where you spray sand onto the beach

traditional methods cost about £20 per cubic metre

taking sand, from pool harbour, offshore to be moved naturally by currents was cheaper at 3m per cubic metre but a 2018 study showed only 3% of the 30,000 m3 of sediment had reached the beach after 18 months

over 3.5 million m3 has been added to Poole bay beaches