Which hazard increases following prolonged saturation within a constructed levee's earthen structure?

💡 Explanation

When a levee becomes saturated over a prolonged period, increased pore water pressure weakens the soil structure, leading to liquefaction during an earthquake because the effective stress diminishes rapidly. Therefore liquefaction risk increases, rather than deposition rate reduction, settlement, or habitat increase, which involve alternative mechanisms.

• Which mechanism causes reduced water column mixing within a fjord during spring snowmelt?
• Which process primarily drives the formation of a deep fjord from a pre-existing U-shaped glacial valley?
• Which risk increases downstream from an artificially straightened meander resulting in an oxbow lake cutoff?
• Which outcome results when rapid river levee aggradation slows?
• Which mechanism causes increased rockfall within cirques undergoing thaw?
• Which outcome occurs when sediment deposition blocks the neck of a river meander loop?