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Disturbed <br />Condition: Compacted Bare Soil <br />CP: 1.30 (Table 5.5a) <br />Rainfall Factor. R. An average annual R value and an average storm R <br />value is needed to compute long-term erosion, in order to calculate the <br />annual sediment yield. Values were calculated using procedures set forth <br />in Barfield, et. al., (1981) as follows: <br />R,,,,,,_, = 27Pz.z for a Type II Storm <br />2.6 <br />Where: Pz., = 2-year, 6-hour precipitation in inches <br />= 1.4 inches <br />Therefore, <br />R~,,,,,,, = 27(1.4)z.z = 56.6 <br />R,,,,,,, = 9 .25P:.z <br />D <br />Where: P is the 10-year, 24-hour precipitation in inches and D is the <br />storm duration in hours = 2.8 inches <br />Therefore, <br />Rte,,,,, = 9.25 2.8 z.z = 42.0 <br />(24) <br />Sediment Specific Weight. SW. The specific weight of sandy-loam is <br />approximately 60 lbs/ft'. <br />Sedimentologv - Calculations <br />Sedimentology - Inputs <br />All sedimentology inputs for each subwatershed are shown on Table 2, <br />SEDCAD+ Version 3.0. Pond 1 and Associated Structures. <br />~~ <br />14d Revised 4/10196 <br />Minor Revision No. 30 <br />