3 articles
Flood barrier
A flood barrier, also known as a storm surge barrier or hurricane barrier, has movable gates closed against storm surge while letting ships pass and tides flow in normal conditions.
Floodgate
A floodgate, also known as a stop gate or crest gate, is a movable barrier across a waterway or spillway, normally held open and closed during flood threats.
Floodwall
A floodwall is a long, narrow barrier of reinforced concrete or masonry built to protect land from flooding; an earthen version is usually called a levee.