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Soil Control <br /> Disturbed Rainfall Erodability Length Slope Practice <br /> Area R K LS CP <br /> 1 40 . 70 5 . 0 1 <br /> IA 40 . 35 4 . 25 1 <br /> 2 40 . 70 1 . 7 1 <br /> Annual Sediment Losses <br /> Disturbed A A <br /> Area tons/acre acre-feet/acre* <br /> 1 140 . 0 . 0918 <br /> lA 59 . 5 . 0390 <br /> 2 47 . 6 . 0312 <br /> *1 ton x 1 x acre 2x 2000 lbs = . 000656 ac-ft <br /> acre 70pcf 43560ft ton crc <br /> Sediment Delivery Ratio* <br /> From AHSDA Fig 5 . 24 and 5 . 25 the following Sediment <br /> Delivery Ratios were determined . <br /> Estimated <br /> Disturbed Sed . Delivery Sed Delivery <br /> Area Ratio (Theoretical) Delivery Ratio <br /> 1 . 16 . 70 <br /> lA . 50 . 70 <br /> 2 . 20 . 70 <br /> *This method takes into account the following factors : <br /> surface runoff , texture of eroded mt . , percent ground <br /> cover , slope shape, delivery distance, surface roughness <br /> and slope gradient <br /> Estimated annual yield of sediment delivered to ponds <br /> Disturbed Sed Loss Sed Delivery <br /> Area Area (Ac) (ac ft/ac) Ratio <br /> 1 11 . 63 . 0918 . 70 <br /> lA 7 . 23 . 0390 . 70 <br /> 2 3 .49 . 0312 . 70 <br />