Question

What is ironical about dams?

Answer 1

Answer:

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When a river is stilled behind a dam, the sediments it contains sink to the bottom of the reservoir.

The amount of sediment carried into a reservoir is at its highest during floods .

The construction of a dam blocks the flow of sediment downstream, and increased sediment build-up in the reservoir.

This triggers floods,

Answer 2

Answer:

they have increased the possibility of flood because of sedimentation in the reservoir