Surface Run-off, Soil Erosion and Slope Instability - Semi-quantitative Approaches for Landslide Assessment and Prediction - page 139

Table 4.11 Month wise surface run-off distribution from individual watersheds
Watershed

Parameters Jan Feb Mar Apl May Jun July Aug Sept Oct Nov Dec

I Rainfall 12.57 16.67 43.76 94.85 302.8 728.4 995.5 783.9 587.9 183.3 12.3 21.9

CN 85.02 85.02 85.02 85.02 85.02 85.02 85.02 85.02 85.02 85.02 85.02 85.02

S 44.75 44.75 44.75 44.75 44.75 44.75 44.75 44.75 44.75 44.75 44.75 44.75

Q 0.27 1.14 15.23 56.48 255.01 677.32 943.74 732.64 537.41 138.74 0.23 2.91

Run-off 2139 9793 130826 485163 2190535 5818179 8106727 6,293,378 4,616,352 1,191,777 1,978 24,997

II Rainfall 12.57 16.67 43.76 94.85 302.8 728.4 995.5 783.9 587.9 183.3 12.3 21.9

CN 73.52 73.52 73.52 73.52 73.52 73.52 73.52 73.52 73.52 73.52 73.52 73.52

S 91.48 91.48 91.48 91.48 91.48 91.48 91.48 91.48 91.48 91.48 91.48 91.48

Q 0.38 0.03 5.55 34.88 215.28 629.06 893.6 683.89 490.78 106.15 0.42 0.14

Run-off 604 48 8,825 55,459 342,295 1,000,205 1,420,824 1,087,401 780,340 168,779 668 223

III Rainfall 12.57 16.67 43.76 94.85 302.8 728.4 995.5 783.9 587.9 183.3 12.3 21.9

CN 87.36 87.36 87.36 87.36 87.36 87.36 87.36 87.36 87.36 87.36 87.36 87.36

S 36.75 36.75 36.75 36.75 36.75 36.75 36.75 36.75 36.75 36.75 36.75 36.75

Q 0.65 1.89 18.12 61.62 262.77 668.08 952.72 741.76 545.99 145.55 0.59 4.13

Run-off 2,145 6,237 59,796 203,346 867,147 2,204,664 3,143,976 2,447,808 1,801,767 480,315 1,947 13,629

IV Rainfall 12.57 16.67 43.76 94.85 302.8 728.4 995.5 783.9 587.9 183.3 12.3 21.9

CN 87.76 87.76 87.76 87.76 87.76 87.76 87.76 87.76 87.76 87.76 87.76 87.76

S 35.43 35.43 35.43 35.43 35.43 35.43 35.43 35.43 35.43 35.43 35.43 35.43

Q 0.74 2.04 18.65 62.52 264.08 687.54 954.21 742.93 547.42 146.72 0.67 4.37

Run-off 1,354 3,733 34,129 114,412 483,266 1,258,198 1,746,204 1,359,562 1,001,779 268,498 1,226 7,997

V Rainfall 12.57 16.67 43.76 94.85 302.8 728.4 995.5 783.9 587.9 183.3 12.3 21.9

CN 85.57 85.57 85.57 85.57 85.57 85.57 85.57 85.57 85.57 85.57 85.57 85.57

S 42.83 42.83 42.83 42.83 42.83 42.83 42.83 42.83 42.83 42.83 42.83 42.83

Q 0.34 1.29 15.87 57.66 256.84 679.41 945.88 734.74 539.45 140.33 0.30 3.16

Run-off 418 1,587 29,042 70,922 315,913 835,674 1,163,432 903,730 663,524 172,606 369 3886.8

(continued)