Which process creates natural levees alongside a river experiencing meander cut-off, where an oxbow lake forms?

💡 Explanation

Differential sediment deposition forms levees because coarser particles deposit during floods closest to the channel, creating raised banks. Consequently, levees form alongside the new, straighter channel rather than isostatic rebound, which is vertical land movement.

• Which hazard increases following prolonged saturation within a constructed levee's earthen structure?
• Which risk increases when a cutoff process shortens a fluvial meander?
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• Which risk commonly develops in heavily bioturbated soil horizons?