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<br />Table TR 90-06-7 <br />SEDIMENTATION POND "M3-N° - DIVERSION DITCH DESIGN CALCULATIONS <br />• <br />• <br /> Ditch P-1 (al Ditch P-3,p-3a Ditch P-2 <br />Peak Discharge 9.8 cfs 9.7 cfs ~ ~ 3.8 cfs <br />Ditch Slope 1.3% 2.0% 1.7% <br />n VD ~.s <br />Rp = 1.49503 0.75 ft 0.54 ft 0.61 ft <br />R design ~ Rpeak,~ Vd <_ Vp = 4.0 and stable (Max. velocity at 4.0 fps) <br />Area Qp/Vp = 2.45 ft2 2.43 ftz 0.95 ftZ <br />V-bottom Ditch Design with 2:1 Sideslopes (All Ditches): <br />d=T= 1.11 ft 1.10 ft 0.10 ft <br />Zd <br />Rd = 2 Z rl 0.50 ft 0.49 ft 0.31 ft <br />Ditch Stable? "Stable" "Stab le" "Stable <br />Ditch Configuration: - All ditches v-bottom Wt 2:1 Sideslopes <br />Excavated Depth 2.1 ft 2.1 ft 1.7 ft <br />Design Flow Depth 1.1 ft 1.1 ft 0.7 ft <br />Freeboard 1.0 ft 1.0 ft 1.0 ft <br />Top Width 8.4 ft 8.4 ft 6.8 ft <br />~x 3_zs <br />