coasts
- Created by: jessica ashworth
- Created on: 19-02-20 15:03
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- systems and processes
- high/low energy coastlines
- high
- high inputs of energy from large powerful waves
- due to strong winds long fetches
- rate of erosion exceeds deposition
- erosional landforms
- high inputs of energy from large powerful waves
- low
- low inputs of energy, slow gentle waves
- gentle winds short fetches
- sheltered area
- deposition exceeds rate of erosion
- depositional landforms
- deposition exceeds rate of erosion
- low inputs of energy, slow gentle waves
- high
- sediment sources, cells, budgets
- sediment cell
- between 2 prominent headlands where sediment transfers occur
- eg. flamborough and the wash
- closed system
- littoral cells
- 11 in England and wales
- put in sub cells eg. christ church bay
- between 2 prominent headlands where sediment transfers occur
- budgets
- losses and gains to achieve dynamic equilibrium
- upset by flooding surges and storms
- losses and gains to achieve dynamic equilibrium
- sources
- erosion, rivers
- sediment cell
- weathering
- in situ at a particular point
- chemical
- chemical reaction where salts may be dissolved and is eroded
- carbonation, oxidation, solution
- chemical reaction where salts may be dissolved and is eroded
- biological
- breakdown of rocks by organic activity
- animal burrows, plant roots, micro organism secretion
- breakdown of rocks by organic activity
- physical
- break up of rocks without any chemical changes
- freeze thaw, salt crystallisation, wetting/drying
- break up of rocks without any chemical changes
- mass movement
- downslope movement of material under the force of gravity
- soil creep, individual soil particles move in zig zag motion. wetting and dying. has terracettes and bent trees.
- rotational slip, unconsolodated rock, boulder clay, permeable rock overlies, terraced appearance and scarp
- landslide, block of rock move rapidly down a surface
- rockfall, break of rock fragments from cliff face creating scree at bottom of cliff. in heavily jointed resistant rock
- mudflow, rainwater saturates unconsolidated land, reduced pressure and flows down
- downslope movement of material under the force of gravity
- erosion
- wearing away of land surface over time and removal of material by sea water
- Hydraulic action, Abrasion, Corrasion, Attrition, Wave quarrying, cavitation, solution (corrosion).
- wearing away of land surface over time and removal of material by sea water
- transportation
- movement of sediment through wave action
- traction, suspension, long shore drift
- movement of sediment through wave action
- high/low energy coastlines
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