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3. ABSORPTION AREA SIZING Note:Mound setbacks are meawred from the Absorption Aren. A. Calculate Absorption Width:Bed Width (2.6)X A�lound Absorpdon Ratio �1.F}=Absorption�dtb 10.0 ft X 2.0 = 20.0 ft B. For slopes>1%,the Absorption Width is measured downhill from the t�slope edge of the Bed. Calcutate Dorw►slope Absorption Width:Absorption�dth (3.A)-Bed Width (2.6)=ft 20.0 ft - 10.0 ft = 10.0 ft 4. MOUND SIZING A. Calculate Cleon Sand Lift: 3 feet minus Depth to Limitinq Cor�dition (t.C)=Clean 5and Lift (1 ft minimtxn) 3.0 ft - 2.0 ft = 1.0 ft Design Sand Lift(optional): �� B. Calculate Upslope Hefght:Cleen Sand Lift (4.A)+media depth (1 ft.)+cover (1 ft.)=Upslope Height 1.0 ft + 1.0 ft + 1.0 ft= 3.0 ft D•34:Slope 14uttiplier Tabia lindSlOpe96 Q V 2 3 4 5 6 7 8 9 10 11 12 I3 14 t5 16 17 ib 19 20 II 22 23 24 15 Upslop? 3:� 3.00 2.9� 2.a3 2.75 2.�i 2.6� 2.Sa i.�8 2.a2 2.36 2.3f 2.2b 2.2� 1.+7 2.i3 2.C� 1.06 2.a3 2.00 1.47 �.55 1.43 1.9s �.�4 L91 L85 Beml RatiO r:t a.00 3.8� 3.10 3.57 3.�5 3.33 3.13 3.12 3.Q3 2.At 2.�6 2.T8 2.10 2.b2 2.55 2.48 2.a1 1,35 2.29 213 1.18 2.13 LQ8 2.03 1.4b 1.93 Land Stope% 0 I 2 3 4 5 6 7 e 9 1Q I I 11 �3 tA I5 t6 tl I8 19 20 21 22 t? 14 15 D0:•mslOpe 3:t :.Oc 3.G9 i.34 1,3� 3.a1 3.51 3.66 3.8� 3.45 a.lt a.29 d.�8 a.65 1.95 5.2d 5.55 5.88 6.Id 6.63 1.W 7.J7 7.4i 8.J2 8.93 4.d6 14.02 Berm Rat!o ao1 a,OQ a.t7 4.35 J.S�t a76 5.a0 5.26 5.56 5.BH 6.25 6.67 1.14 7.69 8.24 8.91 9,57 tO.Za 10.9a 11.6�12.�2 13.19 t).� ta,81 15.67 t6.5s I7.a� �_ Select Upslope Berm Multiplier (based on land slope): 2.94 (figure D-34) D. Calculate Upstope Berm�dth:Multlplier (4.C)X Upstope Mound Height (4.6)=Up�(ope Berm Width 2.94 ft x 3.0 ft = 10.0 ft E. Calcutate Drop in Elevotion Under Bed:Bed Width (2.6) X Lnnd Slope (1.D)=100=Dr� (ft) 10.0 ft x 9.0 % _ �oo= 0.90 ft F. Calculate Downslope Mound Heiqht:Upslope Height (4.6)+Drop in Elevation (4.E)=Oownslope Height 3.0 ft + 0.90 ft = 3.9 ft G Select Downslope Berm Multiplier (based on tand stope): 5.18 (figure D-34) H.Galcutate Downslope Berm Width:Multfptier (4.G)X Downslope Hefght (4.�=Downslope Berm Width 5.18 x 3.9 ft = 20.0 ft I. Catculate Minimum Berm to Cover Absorption Area:Dowr►slope Absorptlon Width (3.6 or 3.C)+4 ft.=ft 10.0 ft + � ft = 14.0 ft J. Design Downslope Berm =greater of 4H and 41: 20.0 ft K. Setect Endslope Berm Multiplier: 3.00 (�ually 3.0 or 4.0) L. Calcutate Endslope Berm (4.K)X Downslope Mound Height (4.F)=Endslope Berm Width 3.00 ft x 3.9 ft = 12.0 ft M.Calculate Nbund Width:Upslope Berm Width(4.D)+@�Width (2.6)+Downsl�e Berm Width (4.J)=ft 10.0 ft + 10.0 ft + 20.0 ft = 40.0 ft N. Calcutate Mound Length:Endslope Berm Width (4.L)+Bed Length (2.C)+Endstope Berm W1dth (4.L)=ft 12.0 ft + 38.0 ft + 12.0 ft = 62.0 ft Comments: