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<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 />I <br />I <br />I <br />I <br />I <br /> <br />percent flood or Intermediate Regional Flood. (See definition for Inter- <br />mediate Regional Flood.) <br /> <br />Flood Crest. The maximum stage or elevation reached by the waters of a flood <br />at a given location. <br /> <br />Flood Frequency. (See Probability.) The average recurrence interval of specific <br />discharges or water stages which cause flooding. <br /> <br />Flood Peak. The maximum instantaneous discharge of a flood at a given location. <br />It usually occurs at or near the time of the flood crest. <br /> <br />Floodplain. An area in and adjacent to a stream, which area is subject to flooding <br />as the result of the occurrence of a 100-year flood and which area thus is so <br />adverse to past, current, or foreseeable construction or land use as to con- <br />stitute a significant hazard to public health and safety or to property . <br /> <br />Flood Profile. A graph showing the relationship of water surface elevation to loca- <br />tion, the latter generally expressed as distance above mouth for a stream of <br />water flowing in an open channel. It is generally drawn to show surface <br />elevation for the crest of a specific flood, but may be prepared for condi- <br />tions at a given time or stage. <br /> <br />Flood Stage. The stage or elevation at which overflow of the natural banks of a <br />stream or body of water begins in the reach or area in which the elevation <br />is measured. <br /> <br />Floodway Zone. The channel of a stream and those portions of the adjoining flood- <br />plain which are reasonably required to carry and discharge the floodwaters <br />of a 100-year flood. It is the designated floodplain less than the low hazard <br />zone, if any such low hazard zone has been identified. If no low hazard zone <br />has been identified, then the terms "designated floodplain" and "floodway <br />zone" shall be considered as being synonymous. <br /> <br />Intermediate Regional Flood. A type of flood, including the water surface elevation <br />and territorial occupation thereof, which can be expected to occur at any time <br />in a given area based upon recorded historical precipitation and other valid <br />data, but with an average statistical one percent chance of being equalled or <br />exceeded during anyone year. The term is used interchangeably with a one <br />percent flood or one hundred year flood. (See definition for 100-year flood.) <br /> <br />Low Hazard Zones . That area of the floodplain in which the waters of a 100-year <br />flow will not attain a maximum depth greater than one and one-half feet, <br /> <br />26 <br />