transportation, deposition of coastal sediment

Question 1

recieves sediments in 3 ways…

Answer 1

rivers
eorsion of the coast itsself
material moved to the coastline from the sea bed

Question 2

movmeent of sediment up and down the ebach

Answer 2

swash= up

backwash=down

Question 3

movement of sediment

Answer 3

waves carry sediment and arrive at an angle at the beach depenant upon wind direction and wave refraction (LSD)

swash and backwash opporate in a zigzag movement, overall effect being material moves along the beach.

groynes interfear with the movmeebt by longhsore drift,

Question 4

types of sediment

Answer 4

cobbles, pebbles, shingle, sand , mud

Question 5

deposition of coastal sediment

Answer 5

happens on the updrift of a groyne or in sheltered locations such as a bay

also occours where the coastline changes shape abruptly

Question 6

sewdiment cells

Answer 6

coastlines divided up into sediment cells with smaller sub-cells imbertween them

sediment is self contained within them with acceptions of suspended finer material

within each cell there is imputs of sediment and most is loved by lsd or tidal currewnts so

boundries are marked by headlands and esturies

direction of sediment movement may change dependant upon the fetch anf the seasons and the direction of the prevailing winds

Question 7

sediment cell- outputs

Answer 7

sediment cannot cross the cell boundires, only be lost out to sea

tidal currents surge up estries and surge out again when the tide falls.
they can carry large amounts of sediment and remove large amounts of silt and mud as these can be suspended within the water.