Which risk increases during prolonged flooding of alluvial plains containing fine silt deposits?

💡 Explanation

During prolonged flooding, increased pore water pressure in saturated silts of alluvial plains reduces effective stress between soil particles, initiating soil liquefaction because frictional resistance decreases. Therefore liquefaction potential increases, rather than weathering, karst formation, or decreased methane production which rely on different geologic processes and conditions.

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