Which risk increases when rapidly rising floodwater overtops a natural levee along a major river?

💡 Explanation

When floodwater rapidly overtops a natural levee, pore water within the levee soil increases because the soil becomes waterlogged, leading to a decrease in soil shear strength and initiating slope failures. Therefore mass wasting slope failures result, rather than ozone depletion, weathering, or ocean circulation changes unrelated to levee mechanics.

• Which process explains crustal thickening at convergent boundaries?
• Which mechanism causes formation of elongated grabens adjacent to strike-slip boundaries?
• Which air mass movement near the equator drives Hadley cell development?
• Which effect increases downslope movement rate during solifluction given saturated active layer conditions?
• Which mechanism sustains high sinuosity in meandering streams within humid continental regions?
• Which deformation pattern emerges when thawing permafrost causes widespread episodic solifluction on moderately steep Arctic slopes?