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<br />GLOSSARY <br /> <br />This glossa~y defines those ter~s f~equen~ly encou~~e~ed in <br />floodplain management. <br /> <br />- Basin - The total land area from which <br />tr,~nsported away by a drainage s)'s~em. <br />"v.:atershed. " <br /> <br />surface run-off :s <br />Al so kno\~'n as a <br /> <br />Channel - The bed of a stream o]~ Liver. <br /> <br />- Contour Interval - the difference in elevation between <br />ad:acent contour lines on a topographic map, usual:y foot, <br />2 feet, 5 feet, or some multiple of 10 feet. <br /> <br />Cubic Feet Per Second (CFS) - A u:1it of neasur-emen:: that <br />describes the amount of flow pas:3ing a given point :.n a stream <br />channel at a given point in timeft One cubic foot Der second <br />is equivalent to approximately 7.5 gallons per second. <br /> <br />- Designation - Approval and adopt~on b}' o~ficial ac~ion o~ a <br />local governing body of the aelinea~ion of an area su~ject to <br />flooding by a 100-year flood; for which water sur-face <br />elevations have been established by a detailed engineering <br />study that has been reviewed and aDcroved by an official <br />action of the Colorado Water Conservation Board, as required <br />by State Statutes. <br /> <br />Disc:harge - The amount or rate of flow of '^,ater through a <br />given stream reach. <br /> <br />Feas:ibility Study - A study to evaluate the feasibility o~ e <br />flood control project based on the benefit/cost ~atio, <br />the availability of public fun6ing, tje likelihood o~ <br />participation by private entities in ~unding and so on. <br /> <br />Flood or Flooding - Tempora~y inun6a~ion of o~he~wise <br />normally d~y land a6jacent ~o a ~ive~, s~ream, :ake, €7C. <br /> <br />Flood of Record - The greatest :lo.od r.ecor-ded for a location. <br /> <br />- Plo~3plain - ~~e lowlands a~jD~~i~; ~~e c~a~~e: c~ a ~~~e~, <br />cree)~, stream or othe~ wate~ co~~ss, :ake, or body o,~ <br />stan~iing water which may be or has been covered by a <br />floodwater. <br /> <br />Floodplain Delineation - The Drocess 0: sho,....ing :n q~~apr::.c <br />::orm on a map or pho~o mosa:c, arectS \Y~'lich may be 0::- <br />have been inundated by a specific or p~edicted ~lood. <br /> <br />- Freeboard - A factor of safety us~ally exp=essed in ~;eet <br />above a design flood level for flood p~otectlon or <br />control works. <br /> <br />Hydraulic Analysis - The study of de-::eJ:.-minir:g wate:- levels <br />for particular flood events. <br />