In 3-5 sentences, describe flood mitigation techniques the federal government might use.

Improving drainage in the cities by ensuring that drainage channels are large enough to handle floodwaters and that they are never blocked. Clogged drainage's impede the flow of water resulting in a rise in water levels in the city. Ensure proper enforcement of laws that ensure that people do not settle on wetlands and riparian land. Wetlands are natural drainage's for water and settling on them is akin to blocking drainage's in a built environment. Constructing flood gates and flood walls to redirect floodwaters away from populated areas. This is especially implemented in built environments that are in low-lying lands and prone to flooding.