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Coastal Landscapes

Low energy coasts and depositional landscape systems

  • 2 things to know
  • AS Unit 1

Overview

Low energy coastline, four depositional landforms of a sandy coastline and estuarine coastline.

What you need to know

Answer each one before you reveal it.

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Key term

Explain why estuaries accumulate fine sediment rather than sand.

Key term

What is meant by a low energy coastline?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is meant by a low energy coastline?

    Model answer

    A coast where wave energy is limited, deposition exceeds erosion and depositional landforms dominate.

  2. 2

    Give three conditions that produce a low energy coast.

    Model answer

    A short fetch, shelter from the prevailing wind, and shallow water offshore that makes waves break early and lose energy.

  3. 3

    Name four depositional landforms of a sandy coastline.

    Model answer

    Beaches, spits, bars and tombolos, with cuspate forelands and sand dunes also common.

  4. 4

    Which coasts of England are typically low energy, and why?

    Model answer

    Much of the east and south-east coast, because the fetch across the North Sea and Channel is far shorter than across the Atlantic.

  5. 5

    What is an estuarine coastline?

    Model answer

    A coastline formed where a river meets the sea in a drowned or infilling valley, characterised by mudflats, salt marshes and strong tidal currents.

  6. 6

    Explain why estuaries accumulate fine sediment rather than sand.

    Model answer

    Tidal currents are slow at high and low water slack, and the meeting of fresh and salt water causes clay particles to clump, so the finest material settles.

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