System - sediment sources Flashcards

1
Q

what accounts for majority of sediment in coastal zone?

A

rivers

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2
Q

Rivers - deposition

A

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

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3
Q

cliff erosion

A

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

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4
Q

wind is what source?

A

coastal energy source

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5
Q

wind

A

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

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6
Q

glaciers

A

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

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7
Q

offshore

A

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

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8
Q

longshore drift

A

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)

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