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<br />METRIC CONVERSIONS <br /> <br />Inch-pound units used in this report may be converted to the International <br />System of Units (51) by using the following conversion factors: <br /> <br />Multiply <br /> <br />acre <br />acre <br />acre-feet (acre-ft) <br />acre-feet (acre-ft) <br />cubic foot per second (ft3/s) <br />foot (ft) <br />square mile (mi2) <br /> <br />~ <br /> <br />To obtain <br /> <br />4,047 <br />0.4047 <br />1,233 <br />0.001233 <br />0.02832 <br />0.3048 <br />2.590 <br /> <br />square meter <br />square hectometer <br />cubic meter <br />cubic hectometer <br />cubic meter per second <br />meter <br />square kilometer <br /> <br />GLOSSARY <br /> <br />flows whose originating meterorological condi- <br />Peak flows are differentiated as produced by <br /> <br />differentiated peak flows.--Peak <br />tions have been determined. <br />either snowmelt or rainfall. <br />flood frequency.--The number of times per year On the average that a flood of a <br />given magnitude is equaled or exceeded. <br />flood plain.--The surface or strip of relatively smooth land adjacent to a stream <br />channel, constructed by the present stream in its existing regimen and cov- <br />ered by water when the stream overflows its banks. <br />foothill streams.--Streams which flow from a high mountain area to a plain or pla- <br />teau area. The stream is subjected to floods resulting from rainfall, snow- <br />melt, or a combination of both. <br />mixed-population flood area.--The transition zone between a high mountain area and <br />a plain or plateau area where floods are caused by rainfall, snowmelt, or a <br />combination of both. <br />natural-f1ow stream.--A stream on which diversions and regulation have insignifi- <br />cant effects on annual peak discharges. <br />peak discharge.--The largest value of annual streamflow, reported in cubic feet <br />per second. <br /> <br />IV <br />