How do I protect against flooding?

Answer

We can prevent floods by constructing barriers like floodwalls around rivers or dams. We can also regulate the floor of a river that causes floods by building a dam. Planting of trees also help as it prevents silting which normally leads to flooding.
1 Additional Answer
Flooding can be prevented by use of levees so that excess water is not able to go over the normal levels. The levees also allow rain water to evaporate before it accumulates. Floodwalls and beams also serve as good flood prevention devices.
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