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Coastal Landscapes

Sediment sources and sediment cells

  • 3 things to know
  • AS Unit 1

Overview

Three terrestrial sources of coastal sediment, coastal sediment cell and why sediment cells matter for coastal management.

What you need to know

Answer each one before you reveal it.

Your recallNot started
Numbers

What proportion of coastal sediment in the UK typically comes from rivers?

Key term

Name three terrestrial sources of coastal sediment.

Key term

Give two offshore sources of coastal sediment.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What proportion of coastal sediment in the UK typically comes from rivers?

    Model answer

    Rivers supply the great majority of it, commonly put at around 80% of the sediment reaching the coast.

  2. 2

    Name three terrestrial sources of coastal sediment.

    Model answer

    Rivers, cliff erosion and material carried down to the coast by mass movement, with glacial deposits contributing on formerly glaciated coasts.

  3. 3

    Give two offshore sources of coastal sediment.

    Model answer

    Sediment moved shoreward from the sea bed by constructive waves and currents, and shell and coral debris produced by marine organisms.

  4. 4

    Why do cliffs of glacial till supply so much sediment?

    Model answer

    Till is unconsolidated and weakly cemented, so it is eroded quickly and yields large volumes of clay, sand and gravel.

  5. 5

    What is a coastal sediment cell?

    Model answer

    A sediment cell is a length of coastline, usually between two headlands, within which the movement of sediment is largely self-contained.

  6. 6

    How many major sediment cells are recognised around the coast of England and Wales?

    Model answer

    Eleven.

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