Holderness coast case study

Question 1

where is sediment subcell 2a located

Answer 1

sediment cell 2a is located in the holderness coast, its boundaries are from flambrough head, through to donna nook, to the bottom of sunk island on the humber estuary

Question 2

what are the imputs into the sub cell

Answer 2

1. storms drive up to 40,000m cubed of sand south around flambrough.
2. smith sands- offshore sand banks deposited.
3. cliff erosion- erosion of clay foreshore
4. wave and tidal forces

Question 3

how is sediment transferred? what processes?

Answer 3

1. LSD southwards towards spurn head (transporting 3-6% of cliff material to spurn head.)
2. wave action moving fine material out to sea.
3. cliff erosion from marine processes
4. cliff weathering from sub aerial processes.

Question 4

what are the key outputs?

Answer 4

small quality of sand are transported north of flambrough head into sediment cell 1 during storms.

Question 5

where are the sediment stores/sinks?

Answer 5

1. sandy beaches from bridlington
2. nearshore mudbanks from mud washed out to sea.
3. spurn head- sand and shingle spit
4. salt marshes behind spurnhead

Question 6

where is there sediment surplus?

Answer 6

spurn head growing out 10cm a year
nearshore mudbanks

Question 7

where is there sediment deficit?

Answer 7

boulder clay cliffs from bridlington south (retreating on average 1.8m a year.)
beaches - they gain sediment from cliffs but lose more sediment via LSD.