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• a) Da = 0.70 <br />From Fig. 5.23 - Sediment - delivery ratio versus <br />size of drainage area, Da (Area Sac) <br />b) Dv = 1.0 <br />c) Dc = 0.43 <br />elevation difference between <br />watershed divide at the <br />Relief <br />main stem and the reservoir site <br />Length = R = <br />L <br />Ratio length of flow path along the <br />main stem <br />R = 5875 - 5735 = 0.25 <br />L 550 <br />• From Fig. 5.24 - Effect of relief - length ratio on delivery <br />ratio, Dc <br />D = 0.43 <br />c <br />d) Dp = 1.0 <br />D = D .D .D .D <br />r a v c p <br />_ (0.70) (1. 0) (0.43) (1.0) = 0.30 <br />Assume 308 of sediment is delivered. <br />Total Sediment Delivered (Ys) is: <br />Ys = R K L S CP X (Dr) <br />_ (16) (0.43) (36) (0.54) (0.30) <br />• = 40 tons/acre/year <br />