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Table 4.10 Calculated CN (AMC-III), retention (S) and run-off and the determination of instability rank
Sub-
watershed
Weighted
curve number
(WCN)
Converted WCN from
condition AMC-II to
AMC-III
Maximum poten-
tial retention (S-
mm)
Actual direct
run-off (Q-
mm)
Run-off
(m
3
)
Landslide potential-
ity index value
(LPIV)
Instabili-
ty rank
I
69.69
85.02
44.75
52.66
4,52,349.40
14.01
1
II
54.06
73.52
91.48
31.85
50,641.50
5.09
6
III
72.80
87.36
36.75
57.66
1,90,278.00
9.41
3
IV
74.69
87.76
35.46
58.53
1,07,109.00
7.36
4
V
71.13
85.57
42.83
53.80
66,174.00
6.52
5
VI
76.93
89.85
28.69
63.33
3,48,948.30
11.86
2
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