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<br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />2:0 <br /> <br />GLOSSARY OF TERMS <br /> <br />I <br />I <br /> <br />Channel - A natut~al or. ar"tificial water" cour"se of <br />~'erceptible extent with definite banks to confine <br />and conduct continuolJsly Ot" per-jodically flowing <br />.....later.. Cha.nnel flow is tha.t water- which is flowing <br />within the I imits of the defined channel. <br />Flood - Water from a t"jvet", stream, water cout-se, lake <br />or- (tthet" tll:1dy of staneJins water", that ternpC,t"ar-i Iy <br />overflows the boundaries within which it is <br />Ctt"d i na.t" i Iy conf j ned. <br />Flood Crest - The maximum stage or elevation reached <br />by the waters of a flood at a given location. <br />F I (lI)d Ff'equency .- A means of e;q::q-"ess j fig the pr"oba.b i I i ty <br />of flood occurrences as determined from statistical <br />analysis of representative streamflow or rainfal I <br />and t"unoff records. The frequency of .a particular <br />stagE? Ot. dischat.8e is usually e7~pt"essed as ocCut.t~in8 <br />once tn a specified number of yeat"s. The 10-, 50-, 100-, <br />and 500-year frequency floods have an average frequency <br />of occurrence in the order of once in the number of <br />yeafs indicated. <br />Flood Hazard Areas - Areas susceptible to flood damage. <br />Flood Peak - The highest stage or discharge attained <br />during a flood event; also referred to as peak stage <br />or peak discharge. <br />Flood Plain - The relatively flat or lowland area adjOining <br />a t" ivet-, str'earo, wa.tet"course, 1 ake, r)t" (rthet" b,:,rjy of <br />water which has been or may be covered tem~lorari Iy <br />by flood water. For administrative purposes the flood <br />plain may be deffned as the area that would be <br />inllndated by the laO-year flood. <br />Left or Right Stream Bank - The left or right bank of the <br />stream looking downstream. <br />Perched Channel Flow - A condition where the flow elevation <br />in the outer portions of the flood plain is hiaher than <br />the flow elevation in the main channel. This condition <br />occurs when a secondary channel receives inflow <br />from some location upstream and maintains a flatter <br />slope than the main channel. <br />Reach - A hydt"Qul ic ensineet"ing tet"fO USE'Ij to desct~ibe <br />longitudinal segments of a stream or river. <br />Runoff - That pat-t of pt~ec ipitatir)n, as well as any othet" <br />flow contributions, which appears in surface streams <br />of either perennial or intermittent form. <br />Stt~eam - ArlY na.tUt"Q I channe I Ot~ depress j (rn tht"ou:jh wh i ch <br />water flows whether continuously, or intermittently, <br />including modification of the natural channel or <br />dept~ess j (In. <br /> <br />I <br /> <br />I <br /> <br />I <br />