sediment cells
- Created by: roz.p
- Created on: 17-11-22 10:29
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- sediment cells
- definition
- stretch of coastline, usually bordered by 2 headlands, where movement of sediment is more or less contained
- closed system
- normal processes of erosion, transportation + deposition occur w/in cell
- features
- stores
- transfers
- inputs
- 11 major cells in england + wales
- coastal protection sig disrupt cell + affect sediment budget
- sediment budgets
- balance between changes in volume of sediment held w/in sys + volume of sediment enetering/leaving sys
- can alter accord to:
- input changes
- vol of material deposited into coastal sys + impact human intervention can have (eg damming river)
- coastal defences impact upon inputs w/ reduced cliff face erosion taking place
- sea level rise may add more sediment w/ increased coastal erosion
- output changes
- human intervention (eg. removing large amounts of sand from area for industrial or coastal protection
- sea level rise increase likelihood of changing ocean currents + material being removed from sediment cells
- input changes
- calculating sediment budget
- 1. id and quantifying sources of sediment in sys
- 2. id + quantifying where sediment stored in sys
- 3. id + quantifying sinks of sediment away from sys
- mappleton
- example of human intervention
- built groynes to prevent beach from getting smaller and eroding at cliff
- further down coast, beach was smaller as no LSD, more cliff erosion and damage to buildings
- definition
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