System - sediment sources

Question 1

what accounts for majority of sediment in coastal zone?

Answer 1

rivers

Question 2

Rivers - deposition

Answer 2

sediment may be deposited in estruses - brackish and important wildlife habitats

Question 3

cliff erosion

Answer 3

very important - in areas with unconsolidated cliffs that erode easily.
- most erosion occurs during the winter months due to more frequent storms

Question 4

wind is what source?

Answer 4

coastal energy source

Question 5

wind

Answer 5

can cause sand to be blown along or up a beach
- sediment transport may occur where there are sand dunes or in glacial and desert environments -> provide sediment

Question 6

glaciers

Answer 6

can flow directly into the ocean depositing sediment that was stored in the ice when they calve

Question 7

offshore

Answer 7

sediment is transferred to the coastal zone when waves, tides and currents erode offshore sediment sinks such as offshore bars. Sediment is transported on to the beach, helping building it up

Question 8

longshore drift

Answer 8

sediment is moved along the beac bc of prevailing winds which alter the direction of the waves.
this allows sediment to be transported from one section of coastline (as output ) to another (input)