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Geography

Which 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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