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" JO floodplai ~ 1 Imi ts Can be est<lbl i 'ned by l<ly;~g out the measured distances inth"ficld. A<; e~p'a jn~d i" the paragraphs descrl bing the "Flooded Areas" there are portions of the floodplain in the lower reaches that are sul>je't to .h~ 110w flood i ng tau sed by ~ps t ream cond i t j on ';. Thu~, flood i n~ in these "rea5cannotbeverifiedbytraditionalmethod,describedat>ove. These special areas'.-Ieredellneated in the field frQmspe"ial studies. GLOSSARY easin mea~s an enclosed or partly enclo,ed water areA or depression on the surface of the e~rth. Oesignated floodplain means the area designated as a floodplain by official action of the I board of coun ty conn!"~ i oners) (<:I ty CQunc i I) wi th the pr i or con- c~rrenCe of the Colorado ~ater Con;ervation Board. , , ,Iood means a temporary rise in the water level of stream or basin that resul~ inundation of overflow of area, not usually covered by water. ~_ year flood means a flood with a peak flow magnitude that has a one percent chance of being equalled or exceeded in any given year and a frequency of 00- curence of about one in 100 years on the long-term average. ,loO<Jfrequencymeans the average frequency, statistically determined, for which a specific flood flow magnitude may be equalled or exceeded. (Frequency. expressed as an occurrence within a specified number of years, is the equivalent of recurrence interval which is the average time interval between actual occur- rences of a flood event of a given or greater magnitude of flow). Flood profiie mean, a graph or a plotting of water surface elevations of a speCific flood frequency of a stream or basin. flood protection level mean. a level which is established above the IOO-year flood elevation for regulating uSes in high halardareas. Floodplain (general definition) means an area along and adjacent to a stream orbasln..hich is'uLject loflooJing. Floodplain (re9ulatorydefinltlon) means an area in and adjacent toastream . which area is subject to flooding as the resul t of the OCCUrrenCe of an inter- mediate regional flood and which area thu. Is s~ adverse to past, current, or foreseeable construction or land use as to constitute a significant hazard to public health and safety or to property. Intermediate regional flood means a type of flood, including the water sur- face elevation and territorial occupation thereof, which can be expected to occur at any tim.: in a ~ i\t~1l dI"~d tJa>cu u>>on rc"ordcd historicai predpi tal ion and otnH ""lid data, but with an average statistical one percent chJnce of being equalled or exceeded durin9 <lny one year. The term 15 used interchangeably with a one percent flood or IOO-ye<lr flood. Low hazard zone ,",'an, that area of the designated floodplain in whiCh the waters of an Interl"ediate reqioM,1 (I DO-year) flood will not "ftnin n mnximLlOl depth greater than one ancl o",,-half feet.