Which threat increases when levees confine a meandering river within a narrow floodplain?

💡 Explanation

When a meandering river is artificially confined, channel incision occurs because the river's energy is focused downwards, leading to elevated sediment accumulation within the channel. Therefore increased sedimentation is expected, rather than increased nutrient deposition, biodiversity loss, or diminished groundwater recharge, which are opposite outcomes.Levee effects.

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