Which outcome is amplified when artificial levees narrow rivers?

💡 Explanation

Increased channelization intensifies downstream flooding because reduced floodplain storage raises discharge; therefore, flood peaks increase with 'desynchronized' flood pulses, rather than moderated sediment deposition which typically slows floodwaters as they spread.

• Which risk increases when construction restricts seasonal overflow on an alluvial fan?
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• Which mechanism creates stepped waterfalls within karst caves?
• Which mechanism limits formation period of sea stacks?
• Which outcome reduces fjord sediment oxygenation during stratification?
• Which outcome occurs as lakes experience increased evapotranspiration?