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<br />Raster Images A raster image is a collection of dots called pixels. Each pixel is a tiny <br />colored square. When an image is scanned, the image is converted to a <br />collection of pixels called a raster image, Scanned graphics and web <br />graphics (JPEG and GIF files) are the most common forms of raster <br />____,___---1Dlages <br /> <br />. <br /> <br />Term <br />National American <br />Datum 1983 (NAD <br />1983) <br /> <br />National Geodetic <br />Vertical Datum 1929 <br />(NGVD 1929) <br /> <br />North American <br />Datum 1927 (NAD <br />1927) <br /> <br />100-year flood <br /> <br />100-year Floodplain <br /> <br />. <br /> <br />Post Wildfire <br />Hydrology <br /> <br />Regulatory <br />Floodplain <br /> <br />Stream Alteration <br />Activity <br /> <br />. <br /> <br />Definition <br />Refers to North American Datun! of 1983. <br /> <br />Based on the sea level vertical datun! of 1929. <br /> <br />Refers to the North American Datun! of 1927, <br /> <br />A flood having a recurrence interval that has a one-percent chance of <br />being equaled or exceeded during any year (1 % chance exceedance <br />probability). The terms "one-hundred-year flood" and "one percent chance <br />flood" are synonymous with the term" 1 00- year flood". The term does not <br />imply that the flood will necessarily happen once every one hundred years, <br />however a flood- of this magnitude is expected to be equaled or exceeded, <br />based on long-term averages, once during any given one hundred year <br />period. <br /> <br />The area of land susceptible to being inundated as a result of the <br />occurrence of a one-hundred-year flood, This term is synonymous with the <br />term "state regulatory floodplain", <br /> <br />Methodologies and calculations developed to account for the increased <br />water runoff after forest fires. Post-wildfire hydrology shall be evaluated <br />every 3 to 5 years to assess the need for further revision based on <br />watershed recovery, forest regrowth, and other factors, <br /> <br />The Regulatory Floodplain IS synonymous with the 100-year, or 1% <br />chance, floodplain. <br /> <br />Any manmade activity within a stream or floodplain that alters the natural <br />channel, geometry, or flow characteristics of the stream for purposes other <br />than Flood Mitigation Projects that are intended for the improvement of <br />drainage, flood control, flood conveyance or flood protection. <br /> <br />9 <br /> <br />DRAFT <br />