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yield. Values were calculated using procedures set forth in Barfield, et. al., (1981) <br />as follows: <br />Ra„nu~ = 27zP6z for a Type II Storm <br />Where: Pz,6 = 2-year, 6-hour precipitation in inches <br />= 0.9 inches <br />Therefore, <br />zz <br />Rannua~ = 27(0.9) = 21.4 <br />Rstorm = 19.25P2.z <br />Do.eerz <br />Where: Pis the 10-year, 24-hour precipitation in inches and D is the <br />storm duration in hours <br />Therefore, <br />• Rstorm = 19.25 1.8 z.z = 15.9 <br />(24)0"4G72 <br />Sediment Specific Weight, SW. The specific weight of loose sandy-loam is <br />approximately 85 Ibs/ft3. <br />SfJOWMEL7 <br />Rate of snowmelt <br />An estimation of snowmelt rate is given by the following simplified version of an <br />equation developed by the U.S. Army Corps of Engineers which correlates <br />snowmelt to average ambient temperatures. <br />Md = 0.27D <br />Where Md =Daily snowmelt (cm/day) <br />D =Degree day index for daily temperatures above 0°C <br />10 <br />