Which risk increases when an earthquake causes liquefaction in an alluvial fan delta region supporting infrastructure?

💡 Explanation

When an earthquake induces liquefaction, the saturated alluvial soils lose shear strength because pore water pressure increases, leading to soil particles losing contact and acting like a fluid, causing subsidence. Therefore differential settlement occurs, damaging overlying infrastructure, rather than seismic amplification, erosion increase, or landslide decrease, which need different geotechnical changes.

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