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<br />GLOSSARY OF TERMS <br /> <br />gener"lly dr"..n to show surface ele~ation for the crest of a <br />specIfic flood, but may be prep"red for condItions at a gIven <br />tirneorstage. <br /> <br />Flood <br /> <br />An overflow on lands not normally covered by w"ter and <br />that tire used or usable by mtln. Floods have two essential char- <br />acteristics: (I) thelnund"tlonof land Istemf'Ortlry;tlnd (2) <br />the land Is tldjacent to and Inundate~ by overflow from a river, <br />a stretlm, an ocean, tI lake, or other body of standing water. <br /> <br />FloodStaoe <br />The sttlge or elevation <:It Which overt low of the naturtll <br />b<:lnks of a stre"m or oody of wtlter b9!)lns In the reach or area In <br />whiCh the elev"tion Is measured. <br /> <br />Nornli'llly, a flOOd Is considered as any temf'Orary rise <br />in streamflow or stage, but not the pondlng of surf"ce wtlter, that <br />r~sults In slgntfictlnt adverse offects In the ~lcinlty. Adverse <br />effects may InclUde dam<:!ges from overflow of I"nd "re"s, temporary <br />backwater effects In sewers and local draInage cn"nnels, creatIon <br />of unsanItary conditions or other unfavorable situations by deposi- <br />tion of materials in stream channels during flOOd recessions, rise <br />of ground water coincident with increased streamflow, end other <br />problarns. <br /> <br />HeadLess <br /> <br />. <br /> <br />The effect ot obstructions, such "5 narrow bridge open- <br />ingsorbuildlngs, that limIt the area through whid w"termust <br />flow, raisingtMe surhceof the waterupstr9<lm from theobstrlJc- <br />tlon. <br /> <br />Left Bank <br /> <br />The bank On the left side of a ri~er, stream, or water <br />course looking downstream. <br /> <br />Flood Crest <br />The maximum stage or elevation rea~hed by the waters of <br />a flood at a given location. <br /> <br />Reference Point <br />A numbered point Identifying a specific loc"tlon used <br />for correlating the data shown in vtlrlous forms throughout the <br />report. <br /> <br />FlOOdPlain <br /> <br />The relatively flat "rea or low landS adjoinIng the chan- <br />nel of iJ river, stre"m, water course, OC'3M, lake or other body <br />of st"nding water whiCh has been or may be covered by floodwater. <br /> <br />RI'lhtBank <br /> <br />The bank on the right sjde of a river, stream, or ""tar <br />coorse lOOKing downstream. <br /> <br />FloodProfilc <br />A graph showing th~ relationship of water surface eleva- <br />tion to location, the lotter generally expressed as distance "bovs <br />mouth fora stream of wtlterflowlng In ar,open channel. Itls <br /> <br />10-, 50-, 100-. and 500-Year Flood <br />A flood haVIng a 10, 2, I, or .2 per~ent probability, <br />respectively, of occurrence In any y~r or an av~rage freque~y <br />of o~currence In tne order of once In 10. 50. 100, or 500 ye"rs, <br /> <br />17 <br /> <br />18 <br />