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<br />Annual Sediment Yield, V,,,,,,,,, <br />Sediment yields calculated by SEDCAD for single storm events can be converted to annual yields <br />using the annual average R value. The annual average R factor was deterrruned using the following <br />equation: <br />RM„,a, = 27x( Pz.6 ~ ~ (Bazfield, page 313-316) <br />For a SCS Type II Storm: Where: <br />Pz,e = 2 year, 6 hour precipitation in inches <br />= 0.9 inches <br />R= 27 x (0.9)22 = 21.4 rounded to 22. <br />Specific Gravity and Bulk Submerged Specific Gravity <br />• For a Loam: <br />Specific gravity 2.65 <br />Bulk Specific Gtavity 1.35 <br />2.0 REFERENCES <br />Barfield, B.J., Wamer, R.C., Haan, C.T., 1981, Applied Hydrology and Sedrmentolog~ jor <br />Dirtrrrbed Arcar. <br />Wamer, R.C., Schwab, P.J, 1992, SEDCAD + Vernon 3 <br />Wamer, R.C., Schwab, P.J, 1998, SEDCAD4 I/errion ~ <br />Oxbow Carbon & Mrnerals , 1992, Sanborn Creek Kline Permit Application <br />Urban Flydrology For Small \Y/atersheds, TR-55, 1986, Soil Conservation Service, USDA <br />Erosion and Sediment Control Program Manual, 199G, Bureau of Land and Water Conservation, <br />Pennsylvania <br />• <br />