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<br />i <br />i <br /> <br />D. Definition of Terms <br /> <br />This section contains definitions of some specialized technical terms used <br /> <br />in this document. <br /> <br />FLOOO ROUTING. - A process of determining progressively over time the ampli- <br />tude of a flood wave as it moves past a dam or downstream to successive <br />puints along a river or stream. <br /> <br />FREEBOARD. - Vertical distance between a specified stillwater surface eleva- <br /> <br /> <br />tion and the top of the dam, without camber. <br /> <br />HAZARD. - A situation which creates the potential for adverse consequences <br />such as loss of life, property damage, and adverse social and environmental <br />impacts. Impacts may be for a defined area downstream of a dam from flood- <br /> <br />waters released through spillways and outlet works of the dam or waters <br /> <br /> <br />released by partial or complete failure of the dam. They may also be for an <br /> <br /> <br />area upstream of the dam from effects of backwater flooding or effects of <br /> <br /> <br />landslides around the reservoir perimeter. <br /> <br />HYDROGRAPH. . A graphical representation of the stage or discharge as a <br /> <br /> <br />function of time at a particular point on a watercourse. <br /> <br />IDF (INFLOW DESIGN FLOOD). - The flood hydrograph used in the design of a dam <br /> <br /> <br />and its appurtenant works particularly for sizing the spillway and outlet <br /> <br /> <br />works, and for determining maximum temporary storage and height of dam <br /> <br /> <br />requirements. <br /> <br />MAXIMUM WIND. . The most severe wind for generating waves that is reasonably <br /> <br /> <br />possible at a particular reservoir. The determination will generally include <br /> <br />3 <br />