FLOOD02290 - Laserfiche WebLink

Home Browse Search

I , ~ ~ ~ , GLOSSARYOfTE~S to show 54rf~ce elevatioo for the crest of a specific flood, but nay be prepared tor condItions at a given time or stage. Deck Surface at r~dway or top of railroad ties at center of bridge. Flood Sta~e The stege or elevation at which overflow of the natural banks of a stroam or body of weter begins In the reaCh or area in whiCh thselevationismcosured. FloOO . An overt low On lands nof normally covered by water and that arQ used or usable by man. Floods have two essential characteristics: The foundational land is temporary; and the land Is adjecent to and inundated by overflow frooa river or stream or IIn ocean, lekeor other body of standing water. Nor~lly a flood is considered as any temporary rise in stream flow or stage, but not the pending of surface water, that results in signIficant adversa effects in the vicinity. Adverse effects may Inciudedamagesfroooverflowof landareas,temporarybackwater effects in sewers and local drainage channels, creation of unsanItary conditIons or other unfavorable situations by deposition of materials in stream channels during flood recessions, rise of ground water coincident wIth Increased stream flow, and other problems. f1eadLoss The effect of obstructions, such as narrow bridge openings or bulldingsth<lt limit the area through which water must flow, rals lng the surface of tne water upstream from the obstruction, , , , , Intermediate Regional Flood A flood having a one percent probabi lity of occurrence in any year or an average frequency of occurrence in the order of once in 100 years, The flood may occur in any year. It Is based on statis- tical analyses of stream flow records and "n"lyses of rainfall and rUr>QffcnaraCTerlsticsinthegeneral region 01 th"..",tersl1ed, Left &Ink FloodCr"st Tho bank on the I"ft side of a river, stream or water course, T~o max!m~m stage or elevation reached ~y the wat~r5 Of a fl~1 locking ~v'..nstr(>:)Ill, at a given location. FloodPlain The r,,'atively flat ar~a or low lands adjoining the channel of a river, strsamor water course or ocean, lake or other body of stand - ing w.,ter, which has been or may b" covered by floodw"ter, Ri~ht Sdnk The bank on the right ~iae of " river, stream, or water COurSe looki~ downstream. FIOQdProfil" A graph showing the r"lationshlp of wat"r surfac" "Iev"tion to location, the lattor 9"nerally expressed as distance i)I)Ovo mouth for a stream 0 f "",ter f low i ng i n an open c himn" I. I ~ I 5 goner'd I I Y dr", wn Standard PrDj<>et Flood The flood that may be 8xp~ted from the most Severe com~ination of meteorological an~ hydrological conditions that are considerOd red50nably chi,lr<:lcteristk 01 the goographkal ~rea in ...hlch the 10 18