Intentional

Question 1

How many metres lost since roman times and in a year?

Answer 1

4-6km lost since Roman times

2m per year

Question 2

Hornsea

Answer 2

Groynes introduced were placed to trap sediment and act as a buffer from waves. Sediment collected helped reduce the rate of cliff retreat. Sea wall prevents wave energy influencing coast.

Question 3

Mappleton

Answer 3

Two rock groynes trap sediment and prevent LSD. Original TGS from Hornsea has meant that Mappleton has had to do the same. Rock armour dissipates wave energy and also prevents deposition of sediment to form beaches on top of it.

Question 4

Aldbrough

Answer 4

The lack of production on coastal defences has led to little altering of the impacts on the coast. The rate of erosion has increased due to TGS. The fast eroding coast means more sediment is accumulated through erosion in the source of an input.

Question 5

Withernsea

Answer 5

The recurved seawall dissipates wave energy. Also does not allow for LSD to take place therefore upsetting the equilibrium within the coastal system. The rip rap used also helps dissipate wave energy and therefore impacts the energy throughout the sediment cell.

Question 6

Easington

Answer 6

Revetments placed in front of the gas terminal dissipate wave energy and slow down the coastal regreta. The also allow less sediment to be accumulated and deposited to create a significant coastal landform.

Question 7

General facts

Answer 7

4-6km lost since Roman times
2m per year
Timber groynes at Hornsea - protect coast, buffer beach → more sediment reduce cliff retreat
Straight sea wall dissipates wave energy (EXPENSIVE) , prevents erosion from being as fast
Mappleton → two rock groynes
Reduces 4m rate of erosion rate due to TGS from Hornsea. Made of rock revetment from Scandinavian rocks
Rock armour also dissipates wave energy
Aldbrough suffer from TGS from Mappleton - no funds to reduce speed of erosion
Withernsea - sea wall protects tourist destination - valuable source of income
Recurved seawall dissipates wave energy without really affecting coastal budget.
Riprap prevents scouring
Easington has revetments to protect gas terminal
Off shore dredging used for sediment to act as beach nourishment for beaches
Wide steep sandy beaches from LSD trapped by groynes