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← GeographyWhich consequence results when migrating barrier islands breach?
A)Increased tidal prism in lagoon✓
B)Decreased wave refraction offshore
C)Sand supply increase downdrift shore
D)Decreased longshore current sediment load
💡 Explanation
Barrier island breaches cause rapid increases in tidal prism because scouring occurs. Tidal prism increase arises due to the newly created pathway between the ocean and the back-barrier lagoon, therefore increased prism volume, rather than wave behaviors or sediment dynamics, is the immediate effect.
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