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Table 3.9-3 PEAK DISCHARGE FOR RECLAIMED EPHEMERAL CHANNELS <br /> <br />I-__J <br /> <br />AYERAGE SLOPE CALCULATION WHERE SLOPE = 0 25 Z (LC25+LC50+LC75) <br />ARFAlsn-ftl <br /> <br />Basin Elevation <br />Bottom Top-~ <br />Elevanon -_ Ei Dit <br />Z ~'-LC25 <br />~~iengtB --yC50 ~ <br />-length -~~- LC75 <br />:--length _~ -:AREA --~~ ~ <br />K S -FT ACRES -~ AVG~ ~~ <br />SLOPE <br />A 5475 6345 870 1240 1532 1492 1,965 45.11 47.2 n <br />B 5575 6100 525 258 367 160 174 3.99 59.3 <br />C 5550 6150 600 319 243 190 192 4.41 58.8 0 <br />D 5525 6345 820 420 380 608 675 15.50 42.7 0 <br />E 5650 6480 830 800 904 1056 1,442 33.09 39.7 n <br />F 5650 5950 300 286 306 278 82 1.87 80.0 0 <br />G 5700 6040 340 240 384 272 226 5.18 33.8 <br />H 5700 6720 1020 1392 1000 992 2 502 57.45 34.5 <br />PEAK FLOW CALCULATIONS <br />fn• 1 n ~.mr 9Ahnur e.mn} 7 7 inrhac <br /> <br />Basin :Hydraulic <br />::LengM ' Area: <br />_(acres)~ BasiK' <br />Scope - -'slope <br />ADJ #~ ;equia - <br />: ~ :Area '°CFSlIN <br />~ ~ ~~ :: ~ -Rp-' <br />~ ~ :Equiv.. <br />:Discharge' ~ ~Acfual <br />Discharge <br />A 2240 45.11 47 0 1.22 52.14 48 0.09 5.27 4.56 <br />B 1050 3.99 59 1.25 14.74 19 0.09 2.14 0.58 <br />C 1160 4.41 59 1.25 17.41 22 0.09 2.48 0.63 <br />D 2020 15.50 43 1.15 43.89 43 0.09 4.45 1.57 <br />E 2200 33.09 40 1.18 50.60 47 0.09 4.99 3.26 <br />F 810 1.87 80 1.19 9.57 14 0.09 1.50 0.29 <br />G 1012 5.18 34 a 1.09 13.87 19 0.09 1.86 0.70 <br />H 3040 57.45 34 1.18 86.75 69 0.09 7.33 4.85 <br />* -- Cover = 43.3 % Veg. + 24 % litter = 67.3go Figure S-3 Juniper/Grass & Soil C CN = 67 <br />DITCH DESIGN Trapezoidal Ditch <br />Vmax for both soil types will be 5.0 fps. All ditches have been designed for lower flows. <br />All ditches will be lined with "LANDLOCK 450" or equivalent to help armor the channel and protect <br />it from eroding. Manufacturers design limits call for Shear Stress to be less than 2.0 <br />The LANDLDCK 450 will be anchored in accordance with the manufacturers recommendations. <br />nA~.. anne ere <br />r` <br />r <br />::::. <br />Basin- Elev, <br />Diffr Odch <br />engt Oitoh <br />.'Slope ' Manning:. <br />Numile= Slde <br />Slopes <br />~ :: ..!Base <br />-Width <br />, .:...Ditch . <br />Depth <br />,. .~.E)epth <br />=of-Flow Area-. of <br />Fldw: Hydc.~. <br />Radius Flow- <br />Velocity <br />F Design. <br />Flow . ..SHEAR <br />T=wys <br />/ <br />A 6 60 0.1 0.035 1.00 4 1.5 0.228 0.964 0.2075 4.72 4.55 1.42 <br />B 20 90 0.22 0.035 1.00 1 1.5 0.120 0.134 0.1003 4.33 0.58 1.66 <br />C 15 40 0.38 0.035 1.00 2 1.5 0.071 0.147 0.0668 4.29 0.63 1.66 <br />D 35 130 0.27 0.035 1.00 2 1.5 0.107 0.332 0.1007 4.78 1.59 1.80 <br />E 13 135 0.10 0.035 1.00 4 1.5 0.189 0.792 0.1746 4.13 3.27 1.14 <br />F 8 35 0.23 0.035 1.00 0.5 1.5 0.117 0.072 0.0870 3.99 0.29 1.67 <br />E & F 10 70 0.14 0.035 1.00 5 1.5 0.155 0.799 0.1469 4.48 3.58 1.38 <br />G 20 40 0.50 0.035 1.00 3 1.5 0.055 0.168 0.0532 4.26 0.72 1.72 <br />H 20 100 0.20 0.035 0.50 7 1.5 0.138 0.975 0.1335 4.97 4.85 1.72 <br />inn volt tatz-sa <br />