Which structural risk increases when timber pile foundations are exposed to fluctuating water levels in Venice, Italy?

💡 Explanation

When timber piles are exposed to fluctuating water levels, alternating wet and dry conditions promote wood decay because aerobic and anaerobic microbes thrive in these zones, accelerating decomposition. Therefore microbial decomposition increases, rather than hydrostatic pressure, liquefaction, or soil erosion, which involve different mechanisms and environmental factors.

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