Similar to a levee, floodwalls are built to prevent the inundation of high-level water; however, they are generally in areas requiring limited space. A floodwall can either be permanent or temporary, is usually small in scale (e.g. retaining wall or terrace) and sometimes is coupled with a smaller scaled floodgate to control water flow. Compared to levees, floodwalls are also generally more resistant to erosion.
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