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F. ABSORPTION WIDTH <br /> 1. Abso tion width uals absorption ratio(see Figure D-33)times rock layer width <br /> 2 x 10.0 ft = 20.0 ft <br /> G. MOUND SLOPE WIDTH&LENGTH(Greater than 1°k) <br /> 1. Downslope absorption width=absorption width minus rock layer width <br /> 20 feet - 10 feet= 10 feet <br /> 2. Calculate mound size <br /> UPSLOPE <br /> a.Determine depth of clean sand at upslope edge of rock layer=3 feet minus distance to restricting layer(C1) <br /> 3 ft - 1.5 ft= 1.5 feet <br /> b.Mound height at the upslope edge of rock layer=depth of clean sand for separation(G2a) <br /> at upslope edge plus depth of rock layer(1 foot)to depth of cover(1 foot) <br /> 1,5�+��+1ft= 3.5 feet <br /> c.Upslope beRn multiplier based on land slo see figure D-34) <br /> Select berm multiplier of 3.85 <br /> d.Upslope width=berm multiplier(G2c)times upslope mound height(G2b): <br /> 3.85 x 3.5 ft = 13.5 feet <br /> [134: SLOPE MULTIPLIER TABI.E <br /> l�nd VPSLOI'E DOWtiSLOPE <br /> Slo�e inultiplir�s tw•a•arious mwlKplie�a forvuious <br /> in.o slopr ralios slope ratios <br /> 3:1 4:1 5:1 6:1 7:1 B:1 3:1 a:l 5:1 6:1 7:1 <br /> 0 3A 9.0 5.0 6A 7.0 11.0 3A a.0 SA bA 7A <br /> 1 2.41 3b5 4.^6 5.66 6.Sd 7.41 3.09 4.17 5.2ti 6.36 753 <br /> 2 2.b3 3.70 4S! 59ti 6.1•t 6.96 3.19 a.3� 5.56 682 8.14 <br /> 3 2.:5 3.57 a3a 5A6 5.'.•9 5.;5 330 4.5�1 5.88 732 B.Bti <br /> 4 2.b6 3.� 41i 4b1 5.�6 4JOG 3.4! 4..^6 6?5 '.69 9.72 <br /> S 2.61 333 4A0 4.62 5.19 S.T1 3S3 5A0 6.6: 8S 10.77 <br /> G 2Si 3.?3 3.85 4.41 473 5.�1 3.66 5.26 7.14 9.� l2.07 <br /> : 2.18 3.12 3.:'�D 421 4J0 5.11 3.e0 5.56 7b4 1031 13.i3 <br /> 8 2.�{2 3A3 3.S 4.06 9.� 3.98 31)S S�B 1133 1151 t5.91 <br /> 9 2�6 2.?1 3.�5 390 9J0 �1.65 �1.11 b.25 9A9 13ht 18.�12 <br /> 10 231 2.86 333 3.75 4.12 9.+f 429 6.67 10A0 I5.00 2333 <br /> 11 2.26 2.'6 723 3b1 3.95 �.26 �.48 '.lA I7.11 l^.b5 �0.�3 <br /> 12 221 2.'U 3.12 3.d9 3.80 �1.OB �1rbN �.W1 1250 21.d1 �3'S <br /> DOWNSLOPE <br /> e.Drop in eleva6on=rock layer width(D2)times percent landslope(C5)I 100 <br /> 10 ft x 1 �6 I 100= 0.1 feet <br /> f.Downslope mound height=depth of clean sand for slope difference(G2e) <br /> at downslope rock edge plus the mound height at the upslope edge of rodc layer(2b) <br /> 0.10 ft + 3.5 ft= 3.6 feet <br /> g.Downslope berm multiplier based on percent land slope(see Figure D-34) 4.17 <br /> h.Downslope width=downslope multiplier(G2g)times downslope mound height(G2� <br /> 4.17 x 3.6 = 15.0 feet <br /> i.Select greater of G1 and G2h as the downslope width 15.0 feet <br /> j.Total mound width is the sum of upslope(G2d)width plus rock layer width(D2)plus downslope width(G2i) <br /> 13.5 ft+ 10.0 ft+ 15.0 ft= 38.4 feet <br /> k.Total mound length is the sum of upslope width(G2d)ptus rodc layer length(D3) <br />