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Questions and Answers
What is the primary function of sea walls in coastal protection?
What is the primary function of sea walls in coastal protection?
Which factor significantly contributes to coastal erosion by raising the sea level?
Which factor significantly contributes to coastal erosion by raising the sea level?
What is the role of planting vegetation in sand dune stabilization?
What is the role of planting vegetation in sand dune stabilization?
What is a significant drawback of using tetrapods for coastal protection?
What is a significant drawback of using tetrapods for coastal protection?
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How does matting assist in the recovery of sand dunes?
How does matting assist in the recovery of sand dunes?
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Which method is effective for preventing dune erosion caused by human activities?
Which method is effective for preventing dune erosion caused by human activities?
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What prevents high winds from exacerbating coastal erosion?
What prevents high winds from exacerbating coastal erosion?
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Which of the following is NOT a characteristic of tetrapods?
Which of the following is NOT a characteristic of tetrapods?
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Study Notes
Coastal Erosion Causes
- Strong waves erode coastlines, damaging roads and reducing land area. Destructive waves become progressively powerful.
- High tides allow waves to reach further inland, accelerating erosion.
- Strong winds amplify wave power, increasing coastal damage and erosion speed.
Coastal Protection Structures
- Sea Walls: Built parallel to the shore (concrete, stone, or steel), they absorb and reflect wave energy to prevent inland penetration. Offer long-term protection against storms. Act as barriers against flooding.
- Tetrapods: Four-pronged concrete structures placed along shorelines, gradually breaking waves to reduce shoreline impact. Interlocking design ensures stability and prevents erosion. Cost-effective compared to other measures, despite construction expenses.
Sand Dunes in Port Phillip
- Destabilization: Human activities (e.g., trampling) destabilized sand dunes in Port Phillip, causing vegetation loss and increased wind erosion. This threatened nearby houses with sand accumulation.
- Restoration Strategy: Authorities fenced off affected areas to limit human access, enabling vegetation regeneration.
- Vegetation Planting: Planting vegetation (e.g., grasses) anchors sand, preventing erosion. Established grasses stabilize dunes against wind and storms.
- Matting for Planting: Matting is used to hold moisture and protect young grasses as they take root, enriching the sand.
- Supplementary Measures: Fences and designated access paths help maintain human traffic control, safeguarding the restored dunes.
- Public Awareness: Signboards can provide public information on strategies, promoting cooperation in dune conservation.
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Description
Test your knowledge on the causes of coastal erosion and the protection measures used to combat it. Explore how strong waves, tides, and winds affect coastlines, and discover various structures like sea walls and tetrapods that protect from erosion. This quiz also touches on the impact of human activity on sand dunes.
