coastal systems -sources of sediment

Question 1

what are the sources of sediment?

Answer 1

.rivers
.cliff erosion
.Longshore drift
.wind
.offshore

Question 2

how do rivers act as a source of sediment?

Answer 2

.sediment is transported in rivers and is deposited in river mouths and estuaries where it is
then reworked by waves, tides and currents -most coastal sediment originates from rivers

Question 3

how does cliff erosion act as a source of sediment?

Answer 3

.where rocks are less resistant, they can be eroded adding sediment to the ocean

Question 4

how does Longshore drift act as a source of erosion?

Answer 4

.sediment is transported from one stretch of coastline (as an output) to another stretch of coastline (as an input)

Question 5

how does wind act as a source of sediment?

Answer 5

.wind-blown sand can be deposited in coastal regions -sand dunes
can act as both a sink and source of sediment

Question 6

how does offshore act as a source of sediment?

Answer 6

.sediment from offshore can be transferred into the coastal zone by waves, tides and currents