Which risk increases when earthquake-induced liquefaction occurs beneath a coastal levee?

💡 Explanation

When liquefaction occurs, the saturated soil loses shear strength because pore water pressure increases from seismic shaking, which causes the levee to lose its foundation support and collapse, leading to flooding. Therefore catastrophic collapse is the greatest risk, rather than erosion, subsidence or increased stability which are prevented by the liquefaction event.

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