WJEC A-Level Geography 601-8455-3
Coastal Landscapes
Glaciated Landscapes
Tectonic Hazards
Changing Places
Water and Carbon Cycles
Global Migration
Global Governance of the Oceans
EcosystemsContemporary theme
Economic Growth and Challenge: IndiaContemporary theme
Economic Growth and Challenge: ChinaContemporary theme
Development in an African ContextContemporary theme
Energy Challenges and DilemmasContemporary theme
Weather and ClimateContemporary theme
Fieldwork and Geographical Skills
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.
Name three terrestrial sources of coastal sediment.
Give two offshore sources of coastal sediment.
Questions from this subtopic
Each one with the model answer underneath.
- 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
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
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
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
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
How many major sediment cells are recognised around the coast of England and Wales?
Model answer
Eleven.
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