Which hazard escalates when seawall undermining failure progresses?

💡 Explanation

Increased coastal erosion arises from wave energy dissipation at the breach point due to differential pressure which initiates scouring and ground loss. Because this concentrates hydraulic action leading to accelerated substrate breakdown therefore erosion is heightened rather than mitigated by the wall damage.

• Which process rapidly diverts river flow across alluvial fans?
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