“But one big exception is Davenport, Iowa, which has the dubious distinction of being the largest town on the upper Mississippi without a proper floodwall.”
“The failure of the canal wall decimated a historic primarily African-American neighborhood of homeowners yet there is nothing to show for that beyond a repaired floodwall and empty lots.”
“Mr. Prendergast suggested that aboveground floodwall panels, to be placed over station stairwells or sidewalk vents, were seen as a leading option to protect the system.”
floodplain
(geography) An alluvial plain that may or may not experience occasional or periodic flooding.
“The Salicornioideae are among the most salt-tolerant land plants and frequently occur in saline areas associated with coastlines, tidal floodways and salt lakes.”