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<br />I <br />I <br />I <br />I <br />il <br />il <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />II <br />I <br />I <br /> <br />Flood peak - <br /> <br />Flood fringe - <br /> <br />Flood profile - <br /> <br />Floodway - <br /> <br />Runoff - <br /> <br />Sheet flow - <br /> <br />Stream - <br /> <br />Watershed - <br /> <br />The maximum instantaneous discharge of a flood at a given location It <br />usually occurs at or near the time of the flood crest. <br /> <br />That portion of the flood plain between the floodway district boundary and <br />the upper limits of the base flood. The flood fringe is the portion of a <br />drainage channel or watercourse outside the floodway portion. <br /> <br />A graph showing the relationship of water surface elevation to location, the <br />latter generally expressed as distance above mouth for a stream of water <br />flowing in an open channel. It is generally drawn to show surface elevation <br />for the crest of a specific flood, but may be prepared for conditions at a <br />given time or stage. <br /> <br />The channel of a river or other watercourse in the adjacent land areas that <br />must be reserved in order to discharge the base flood without cumulatively <br />increasing the water surface more than 0.5 Run-off <br />The quantity of rainfall which flows over the surface to enter the stream as <br />discharge volume. The difference in quantity between rainfarun-off runoff <br />represents losses to infiltration and interception. <br /> <br />Broad, shallow overland flood flows varying from a few inches to 2 feet in <br />depth. <br /> <br />Any natural channel or depression through which water flows either <br />continuously, intermittently or periodically, including any artificial <br />modification of the natural channel or depression. <br /> <br />The drainage area situation above a specified point on a stream including <br />the area drained by tributary streams which enter the main stream above <br />this point. <br /> <br />9 <br />