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For silty sand: <br />K = 1x102 cm/sec <br />= 2x102ft/min <br />Cross-sectional azea for arc length of 235 ft: <br />3 <br />Q = (2x102)(0.1)(3290) = 6.6 min = 50 gal/min <br />= 0.22 ac=ft/day <br />3. SEDIMENT STORAGE <br />A = <br />R = <br />K = <br />LS for s <br />C = <br />P = <br />A = <br />R•K•LS•C•P <br />30 <br />0.37 (the soils range from 0.24 to 0.37J <br />= 0.167 and L = 250' = 4.50 <br />0.4 (see Attachment Z) <br />1.0 <br />30 (0.37)(4.5)(0.4)(1.0) <br />20 Tons/acre-yr <br />Three years storage for 41.7 acres = 2500 Tons <br />= 1.35 acre-ft <br />Note: Assumption of a sediment delivery ratio of 1.0 makes this calculation <br />conservative. <br />TOTAL POND VOLUME REQUIRED = <br />1.56 + 0.44 + 1.35 = 3.35 acre ft <br />Volume available = 4.48 acre ft <br />