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<br />r.LOSSARY <br /> <br />!lackwater ~ffect. <br />ucstr03m IrON and as a <br /> <br />The rise In su~f~ce elevation of <br />result 01 ~n obstruction to flow. <br /> <br />Ilowlngwater <br /> <br />Thunderstorm. Ah10n Intensity. convective type stor"'th"r is <br />characterized by Ilghtnln~ Md thunder, and may Oil ~comp~nlad by <br />cxtrc-oly heavy downpours 01 r~]n ~nC streng gus~s 01 ~Ind. Thunder. <br />Horms are 0; short dur~tlon and S'NIII I n area I extent. As usad in <br />nlsreport."thu.,derstOnll"ar,::"clou<JOurst"aresyr\Onymous. <br /> <br />Cloudburst. Soe"thuncerstorf"." <br /> <br />Flood. An overflow at water onto lanos used or u5a~le by ~an 6nd <br />not normallycoverod by water. FloodS have tlNO essential character- <br />Istics: thelnundationot land Istorr,porary; and 'the l1Ind Isaojacent <br />to and Inund~':"ed oy averf low Irom a rl ver, stre"m. I "ke. or ocean. <br /> <br />fiorm"lly. a "flood" lsconslderod as any tempor"ry rlsc Insfrea.... <br />flow or stage (but not the pondlngof sudacewaterl that results In <br />slgnlflcant advarso effects In tho vlclni1y. Ad~erse effects may In. <br />elude damoges from overllow of land areas, temporary backwater effects <br />In sewers and local drainage channels. creation 01 uns"nltary conditlons <br />or other unfavor~ble sltuatlons by depOSition 01 ~aterlals colncldent <br />with lncreasedstreamflow,andotherprobloms. <br /> <br />FlOod Peak. The ~xl"'U~ Instantaneous dIscharge of a tlood at a <br />"lven locat Ion. I t usu~11 y occurs at or near the time of the flood <br />crost, the maximJM stage or elevdtlon roached by the floodflow. <br /> <br />Flood Plain. Tho relatIvely flat area or lowlands adjoining a <br />river. stroa~. watercourse, ocean, or lake, whlch have been or may be <br />covered by floodwater. <br /> <br />Flood Prof1le. A graph snowIng tne relationship of water surfd~e <br />elevil tion to locat ion. the I~ttor qerorall y oxpressed "s distance above <br /><muth Inr" stre"," of wdter tlowlnn In an open channel. It Isgenerallv <br />dr<'lwn to show surface "Ievat Ion for the crest ot a spec I I ic 1 lood, ~ut <br />~y be prepared lor condItions at a given time or ~taqe. <br /> <br />Fl 00;1 Stage. T~e e I evet ion a1 whl cn overf I ow 01 t~e natura I bani<~ <br />of a strea~ or body of water beolns in t~e reach or "rea In whiCh t~e <br />elevatIon ismeesuroc. <br /> <br />'ln~'" .,.. T..~ hi'." ~ ~ <br />,v~~..~]. .,,~ c"ar.ne, e. .,,<) ~'''!!''!'1 ,,~_ <br />pl",i n that would be usaJ to c"rry floodflowS. <br /> <br />t_~e~ ~O)~~I()" "f to" fl",,,l <br /> <br />lntenned1ate Reg10nal Flood. <br />of occurren"e I n t~a order of onco <br />occur In any yeor. <br /> <br />A flooG having an average <br />In 100 yedrs ~Ithouqh the <br /> <br />freOuency <br />flood "'~y <br /> <br />Stand,wd Project Flood. Toe 'Iood that .-.ay ~e expocted Irom the <br />""s~ severe COI"b I~"t Ion e' ""tcorO:O<1lcal and nvdrolog leal cond I tlons <br />tn~t are ~""5IcerE'a r~ascr,,'blv clar~"terlsrlc of rhe 'ltlO<lrdphlCd: Q'''~ <br />in which t~e dr";"a~e b~~1o Is located, excluulnn (;x~rerrely r"re <br />c"",\l, n~t ,,,ns. <br /> <br />"' <br />-- <br /> <br />" <br />