GEOLOGY

Detailed explanation-1: -A levee is a natural or artificial wall that blocks water from going where we don’t want it to go. Levees may be used to increase available land for habitation or divert a body of water so the fertile soil of a river or seabed may be used for agriculture. They prevent rivers from flooding cities in a storm surge.

Detailed explanation-2: -Floodwalls, which are typically constructed of reinforced concrete or masonry, provide a barrier againstinundation, protect structures from hydrostatic and hydrodynamic loads, and may deflect flood-borne debris and ice away from the building.

Detailed explanation-3: -noun. : a wall (as a levee) built to prevent inundation by high water.

Detailed explanation-4: -Temporary flood barriers consist of portable metal frames with a waterproof cover, designed to be quickly set up in pre-planned locations which do not have permanent defences. When flooding is expected, the barriers are quickly put up.

Detailed explanation-5: -Storm surge gates / flood barriers are fixed installations that allow water to pass in normal conditions and have gates or bulkheads that can be closed against storm surges or spring tides to prevent flooding. They can close the sea mouth of a river or waterway.