Geography • Physical GeographyHard
Analyze the mechanics of wave refraction along coastal zones: As ocean waves approach an irregular coastline with alternating headlands and bays, what spatial pattern of wave energy distribution and coastal modification occurs?
A. Wave energy diverges toward the sheltered bays, causing rapid cliff erosion and headland deposition
B. Wave energy converges on protruding headlands through refraction, leading to intensive erosion and sediment transport toward bays✓ Correct Answer
C. Wave velocity remains uniform across all depths, resulting in equal distribution of erosional energy along the entire coastline
D. Refraction completely neutralizes wave action within headlands, depositing massive sandbars directly against sea cliffs
💡 Solution & Explanation
Wave refraction causes wave radials to bend toward shallow water near protruding headlands, concentrating wave energy through convergence and promoting rapid wave attack, sea cliff retreat, and cave formation. Conversely, wave energy diverges within recessed bays, resulting in lower wave heights, decreased erosional capacity, and net sediment deposition that forms sandy beaches. This process continuously straightens irregular coastlines over geologic time scales. Wave velocity varies inversely with water depth in shallow zones.
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