AS Hjulstrom curve
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Created by:
rgamesby on October 24, 2011
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For AQA geography from http://www.coolgeography.co.uk
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11 terms
Terms | Definitions |
|---|---|
 Hjulstrom curve | A graph showing the relationship beween river velocities and erosion, deposition and transportation |
| River transport | The movement of sediment of all sizes in a river |
| Erosion | the mechanical process of wearing or grinding something down (as by particles washing over it) |
| Deposition | the natural process of laying down a deposit of something |
| Critical erosion velocity | the lowest velocity at which grains of a certain size can be moved. |
| Critical deposition velocity | The velocity at which particles of particular sizes are laid down |
| Competence | The largest size of sediment that a river can carry |
| Capacity | The total amount of load that a river can carry given the energy available |
| Clay particles | Tiny particles between 0.001 and 0.01mm in size |
| Sand particles | Sediments between 0.1 and 2mm in size |
| Cobbles | Sediments between 20 and 300mm in size |
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