2008-11-18_REVISION - C1981008 ‎(2)‎

• Permit No: C1981008
• IBM Index Class Name: REVISION
• Doc Date: 11/18/2008
• Doc Name: Adequacy Review
• From: Greg Lewicki & Associates
• To: DRMS
• Type & Sequence: SL11
• Email Name: MLT
• Media Type: D
• Archive: No

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Values for topographicfactor, I.S. for low ratio of rill to intenill erosion.
Horizontal slope length (it)
Slope 4 6 9 12 15 25 50 75 100 .150 200 250 300 400 600 800 1000
M
0.2 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05
0.5 0.08 0.08 0.08 0.08. 0.08 0.08 0.08 0.08 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.09
1.0 0.12 0.12 0.12 0.12 0.12 0.13 0.13 0.14 0.14 0.15 0.15 0.15 0.15 0.18 .0.16 017 0.17
2.0 0.20 0.20 0.20 0.20 020 0.21 0.23 0.25 0.26 0.27 0.28 0.29 0.30 0.31 0.33 0.34 0.35
3.0 0.26 0.26 0.28 0.26 0.26 0.29 0.33 0.36 0.38 0.40 0.43 0.44 0.46 0.48 0.52 0.55 0.57
4.0 0.33 0.33 0.33 0.33 0.33 0.36 0.43 0.46 0.50 0.54 0.58 0.61 0.63 0.67 0.74 0.78. 0.82
8.0 0.38 0.38 0.38 0.38 0.38 0.44 0.52 0.57 0.62 0.68 0.73 0.78 0.81 0.87 0.97 1.04 1.10
6.0 0.44 0.44 0.44 0.44 0.44 0.50 0.61 0.68 0.74 0.83 0.90 0.95 1.00 1.08 1.21 _1.31 1.40
8.0 0.54 0.54 0.54 0.54 0.54 0.64 0.79 0.90 0.99 1.12 1.23.. 1.32 1.40 1.53 1.74 1.91 2.05
10.0 0.60 0.63 0.65 0.86 0.68 0.81 1.03 1.19 1.31 1.51 1.67 1.80 1.92 2.13 2.45 2.71 2.93
12.0 0.61 0.70 0.75 0.80 0.83 1.01 1.31 1.52 1.69 1.97 2.20 2.39 2.56 2.85 3.32 3.70 4.02
14.0 0.63 0.76 0.85 0.92 0.98 120: 1.58 1.85 2.08 2.44 2.73 2.99 3.21 3.60 4.23 4.74 5.18
16.0 0.65 0.82 0.94 1.04 1.12 1.38 1.85 2.18 2.46 2.91 3.28 3.60 3.88 4.37 5.17. 5.82 6.39
20.0 0.68 '0.93 1.11 1.26 1.39 1,74. 2.37. 2.84 322 3.85 4.38 4.83 5.24 5.95 7.13 8.10 8.94
25.0 0.71 1.05 1.30 1.51 1.70 2.17.... 3.00 3.63 4.16 6.03 5.76 6.39 6.96 7.97 9.65 11.04 12.26
30.0 0.77 1.10 1.48 1.75 2.00 2.57. .3.60 .4.40 5.08 6.18 7.11 ., 7.94 8.68 9.99 12.19 14.04 15.66
40.0.. 0.85 1.36 1.79 2.17 2.53 3.30 4.73 5.84 6.78 8.37 9.71 10.91 11.99 13.92 17.19. 19.96 22.41
50.0 0.91 1.52 2.06 2.54 3.00 3.95 5.74 7.14 8.33 10.37 12.11 13.65 15.06 17.59 21.88 25.55 28.82
60.0 0.97 .1.67 2.29 2.86 3.41 4.52 6.63 8.29 9.72 12.16 14.26 16.13 17.84 20.92 26.17 30.68 34.71
'Such as for rangeland and other consolidated soil conditions with cover (applicable to thawing soil where both intenill and rill erosion are significant).