Summary
Coasts are dynamic environments facing constant pressure from natural forces, requiring management to protect people, property, and economic activities. Coastal management involves both hard and soft engineering strategies to address hazards and opportunities.
- Hard Engineering — Man-made structures using concrete, rock, or steel to resist natural processes and protect the coast from erosion and flooding. Example: Sea walls, rock armour, groynes, and gabions.
- Soft Engineering — Strategies that work with natural processes, using natural materials to manage coastal erosion sustainably. Example: Beach nourishment, dune regeneration, and managed retreat.
- Coastal Cell — A stretch of coastline where sediment movement is mostly self-contained, used for planning integrated management. Example: UK coastline divided into sediment cells.
- Longshore Drift — The movement of sediment along the coast by waves approaching at an angle (swash) and returning perpendicular (backwash). Example: Groynes interrupt longshore drift to build up beaches.
- Managed Retreat — A deliberate policy of allowing the sea to flood low-value land, creating natural coastal habitats like saltmarsh. Example: Low-value farmland converted to saltmarsh.
Exam Tips
Key Definitions to Remember
- Hard Engineering
- Soft Engineering
- Longshore Drift
- Beach Nourishment
- Managed Retreat
- Coastal Cell
Common Confusions
- Mixing up hard and soft engineering strategies
- Misunderstanding longshore drift and its impact
Typical Exam Questions
- Explain how groynes help to protect the coast from erosion? Groynes trap sediment moved by longshore drift, building up the beach on the updrift side, which absorbs wave energy and protects the cliff from erosion.
- Evaluate the use of hard engineering strategies to manage coastal erosion? Define hard engineering, give examples, explain advantages like effectiveness, and explain disadvantages like cost and visual impact.
- "Soft engineering is always better than hard engineering for managing coasts." To what extent do you agree? Introduction with definition. Paragraph 1: Soft engineering advantages (sustainability, cost, natural). Paragraph 2: Hard engineering advantages (protection, reliability). Conclusion: Depends on location and value - use both.
What Examiners Usually Test
- Understanding of different coastal management strategies
- Ability to evaluate advantages and disadvantages of engineering methods
- Application of specific examples in answers