Sandbanks

Question 1

Where is Sandbanks located?

Answer 1

The South coast of England in Dorset. It separates Poole harbour from Poole bay

Question 2

Why does Sandbanks need management? (2 reasons)

Answer 2

• high number of high value properties and hotels (e.g Sandbanks hotel) which provide employment and generate spending in the local economy
• Residential properties are in high demand and fetch high prices

Question 3

Why does Sandbanks need management? (2 reasons)

Answer 3

• The beach is a major tourist attraction as it has a gentle slope and blue flag status
• Popular for water sports (e.g water skiing, sailing) due to the protection provided by Poole harbour and also houses yacht clubs and marinas which provide money to the local economy

Question 4

Why does Sandbanks need management? (2 reasons)

Answer 4

• The entrance Poole Harbour is used by cross channel ferries and commercial ships (carrying goods such as timber) LSD of the beach could cause the harbour to become clogged
• Climate change means the sea level will rise leaving Sandbanks vulnerable to flooding and could cut the peninsula off from the mainland

Question 5

What is the sea rise likely to be in this area?

Answer 5

0.6m in the next 100 years

Question 6

What is the estimated cost in loss of properties due if no management strategies were applied?

Answer 6

£18m

Question 7

What is the house price of detached houses?

Answer 7

Over £10m

Question 8

What management strategies have been used?

Answer 8

• Wooden groynes

- Beach Recharge

Question 9

How many wooden groynes were constructed?

Answer 9

10

Question 10

How much did each groyne cost?

Answer 10

£100,000

Question 11

How many rock groynes were constructed?

Answer 11

5

Question 12

Why were rock groynes constructed?

Answer 12

• To maintain a wide, deep beach
• To minimise LSD which could otherwise block up the harbour
• They absorb wave energy, which reduced erosion
• More sand means more friction which also reduces wave energy and erosion

Question 13

What is beach recharge?

Answer 13

Offshore sand is sprayed onto the beach

Question 14

How much does beach recharge cost?

Answer 14

£20 per m3

Question 15

Why has beach recharge been used?

Answer 15

Conserves the beach and helps to increase beach size

Question 16

Without groynes what would the rate of erosion be?

Answer 16

1.6m per year

Question 17

Why managed?

Answer 17

• Residential properties in high demand
• Beach is major tourist attraction
• peninsula acts as entrance to Poole harbour and is used by boats. Without management, LSD beach sediment makes it shallow
• climate change and rising sea levels could cause flooding without management and could destroy properties. Without management it is estimated that 18 million of damage would occur over the next 20 years.

Question 18

How managed?

Answer 18

• rock groynes are installed to maintain deep wide beach. This minimises movement of sediment along beach by LSD. It also absorbs wave energy and reduces rate of erosion. W/out rock groynes erosion rates - 1.6m/year
• beach recharge is also used to preserve beach. Sand dredged from offshore reserves sprayed onto beach so cross section increased. In total over 3.5 million m^3 of sediment added