groynes
- Created by: michaelscottsbesty
- Created on: 11-11-22 20:35
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- groynes
- what are they?
- wooden barriers built at right angles to beach
- what do they do?
- trap sediment moved by longshore drift
- enlarge beach
- how do they prevent erosion?
- build up sand on updrift side
- act as buffer against wave attack
- cost of groyne
- £150,000 per 200m
- advantages
- create wider beach for tourism
- last 40 years if well maintained.
- disadvantage
- 1) stop long-shore drift, 2) beach further along is starved, 3) increase erosion in other places
- what are they?
- how does wider beach reduce wave damage?
- absorb wave energy
- groynes
- what are they?
- wooden barriers built at right angles to beach
- what do they do?
- trap sediment moved by longshore drift
- enlarge beach
- how do they prevent erosion?
- build up sand on updrift side
- act as buffer against wave attack
- cost of groyne
- £150,000 per 200m
- advantages
- create wider beach for tourism
- last 40 years if well maintained.
- disadvantage
- 1) stop long-shore drift, 2) beach further along is starved, 3) increase erosion in other places
- what are they?
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