Laserfiche WebLink
<br />20. <br /> <br />"Hydrologic <br />peak rate <br />for various <br />or basins <br />process. <br /> <br />"Hydraulic analysis" means the determination <br />elevations and velocities for various <br />probabilities based on a scientific analysis <br />movement and behavior of flood waters in channels <br /> <br />analysis" means the determina- tion of the <br />of flow, or discharge in cubic feet per second, <br />selected probabilities for streams, channels, <br />based on a scientific analysis of the physical <br /> <br />21. <br /> <br />of fl ood <br />selected <br />of the <br />or basins. <br /> <br />22. "Levee" means a man-made structure, usually an earthen <br />embankment, designed and constructed in accordance with <br />sound engineering practices to contain, control, or divert <br />the flow of water so as to provide protection from flooding. <br /> <br />23. "IOO-year flood" means a flood which has a magnitude <br />(peak discharge) which is expected to be equaled or <br />exceeded on the average once during anyone-hundred year <br />period (recurrence interval) and has a one-percent chance <br />of being equaled or exceeded during any year (0.01 <br />exceedance probabi 1 ity). The terms "one-hundred-year <br />flood," "one percent chance flood," and "intermediate <br />regional flood" are synonymous with the term "IOO-year <br />flood." <br /> <br />24. "IOO-year floodplain" means that area of 1 and suscept i bl e <br />to being inundated as a result of the occurrence of a <br />one-hundred-year flood. <br /> <br />25. "Precise" means accurate to within 0.5 foot vertically <br />or 5.0 feet horizontally. <br /> <br />26. "Project cost" means the total financial cost of a flood <br />protection system (including design, land acquisition, <br />construction, fees, overhead, and profits), unless the <br />Board determines a given "cost" not to be a part of such <br />project cost. <br /> <br />27. "Rational Method" means an empirical method used to <br />determine the maximum rate of runoff based on the formula Q <br />= CIA, where Q is approximately eq~al to the peak rate of <br />flow in cubic feet per second, C is a runoff coefficient, I <br />is the average intensity of rainfall, and A is the <br />contributing basin area in acres. <br /> <br />-5- <br />