List of Tables (Supplementary)
Table A Landslide inducing factors and modified information values (MIV)
Categories / (Ni) / (xi) / Information value / Modified Information Value / Classweight / Total factors weight
Each sub-class / Total
class
Slope gradient (in degree)
0-13.37 / 8916 / 112 / 0.517 / 5.042 / 0.601 / 12.17 / 4.940
13.37-21.69 / 14612 / 298 / 0.839 / 0.879 / 17.79
21.96-29.84 / 17122 / 464 / 1.115 / 1.081 / 21.88
29.84-38.43 / 13827 / 382 / 1.136 / 1.095 / 22.17
38.43-60.63 / 6477 / 226 / 1.435 / 1.284 / 25.99
Slope Aspect (direction of slope)
Flat (-1) / 5498 / 81 / 0.606 / 9.765 / 0.683 / 7.13 / 9.575
North (0-22.5) / 6351 / 58 / 0.376 / 0.460 / 4.80
North-east (22.5-67.5) / 5834 / 98 / 0.691 / 0.758 / 7.92
East (67.5-112.5) / 6675 / 233 / 1.436 / 1.285 / 13.42
South-east (112.5-157.5) / 7819 / 170 / 0.894 / 0.921 / 9.62
South (157.5-202.5) / 7859 / 235 / 1.230 / 1.157 / 12.08
South-west (202.5-247.5) / 7285 / 286 / 1.615 / 1.387 / 14.49
West (247.5-292.5) / 4456 / 120 / 1.108 / 1.076 / 11.24
north-west (292.5-337.5) / 4485 / 116 / 1.064 / 1.045 / 10.91
North (337.5-360) / 4692 / 85 / 0.745 / 0.803 / 8.39
Slope curvature (positive, negative and zero)
Concave / 27664 / 707 / 1.051 / 2.676 / 1.036 / 37.81 / 2.740
Flat / 1639 / 26 / 0.652 / 0.724 / 26.42
Convex / 31651 / 749 / 0.973 / 0.980 / 35.77
Relative relief (in metre)
64.48-225.18 / 764 / 0 / 0.226 / 3.658 / 0.294 / 07.87 / 3.736
225.18-332.31 / 6416 / 76 / 0.487 / 0.572 / 16.62
332.31-399.86 / 20453 / 675 / 1.357 / 1.237 / 35.94
399.86-465.07 / 21943 / 606 / 1.136 / 1.095 / 31.81
465.07-658.07 / 11378 / 125 / 0.452 / 0.538 / 15.63
Lithology (geological composition)
Sandstone shale/clay / 14579 / 108 / 0.305 / 2.206 / 0.384 / 17.28 / 2.222
Slate,schists, quartzite / 36129 / 1257 / 1.431 / 1.282 / 57.70
Unclassified, crystallines / 10246 / 117 / 0.470 / 0.556 / 25.02
Geomorphology (morphological composition)
Folded ridge / 19179 / 914 / 1.960 / 2.777 / 1.566 / 63.12 / 2.481
Highly dissected hill slope / 30947 / 543 / 0.722 / 0.784 / 31.60
Piedmont fan plain / 10828 / 25 / 0.095 / 0.131 / 5.28
Land use and land cover (LULC)
Agricultural land / 1279 / 28 / 0.900 / 5.721 / 0.926 / 16.44 / 5.632
Fallow land / 340 / 5 / 0.605 / 0.683 / 12.13
Dense mixed jungle / 45613 / 1109 / 0.999 / 0.999 / 17.74
Open mixed jungle / 6765 / 122 / 0.741 / 0.799 / 14.19
River / 3173 / 51 / 0.661 / 0.732 / 12.99
Settlement / 3784 / 167 / 1.815 / 1.493 / 26.51
Soil
W002 / 34632 / 1082 / 1.285 / 2.588 / 1.192 / 45.39 / 2.626
W004 / 10950 / 215 / 0.808 / 0.854 / 32.52
W008 / 15372 / 185 / 0.495 / 0.580 / 22.09
NDVI (Normalised Differential vegetation index)
-0.014-0.121 / 7013 / 198 / 1.161 / 5.036 / 1.112 / 22.18 / 5.013
0.121-0.200 / 11790 / 287 / 1.001 / 1.000 / 19.95
0.200-0.270 / 14307 / 322 / 0.926 / 0.946 / 18.87
0.270-0.340 / 16209 / 439 / 1.114 / 1.080 / 21.54
0.340-0.500 / 11635 / 236 / 0.834 / 0.875 / 17.46
Drainage density (length of drainage/sq.km)
0-396.43 (Very low) / 13858 / 363 / 1.077 / 5.375 / 1.055 / 20.12 /
5.244
396.43-729.44 (Low) / 20896 / 456 / 0.898 / 0.924 / 17.62
729.44-1094.17 (Moderate) / 16664 / 363 / 0.896 / 0.923 / 17.60
1094.17-2077.33 (High) / 8227 / 262 / 1.310 / 1.208 / 23.04
2077.33-4043.67 (Very high) / 1309 / 38 / 1.194 / 1.134 / 21.62
Elevation (height in metre)
166-483 / 14286 / 138 / 0.397 / 4.844 / 0.482 / 10.47 / 4.603
483 – 728 / 17777 / 287 / 0.664 / 0.735 / 15.97
728 – 996 / 14098 / 692 / 2.019 / 1.594 / 34.63
996 – 1321 / 10886 / 308 / 1.164 / 1.114 / 24.20
1321 – 1870 / 3907 / 57 / 0.600 / 0.678 / 14.73
Source: estimated by authors. (Ni)= Number of pixels in each sub-classes and (xi) = Number of landslide occurrence pixels in each sub-classes
Table B Relationship between landslide inducing factors and landslide susceptibility
Factors Categories / Landslide susceptibility zonesVery low / % of very low / Low / % of low / Moderate / % of moderate / Moderately
high / % of moderately high / High / % of high / Very high / % of very high / Total
Slope Angle / Slope and Landslide Susceptibility
0-13.6 / 1257 / 14.88 / 1810 / 21.43 / 2026 / 23.98 / 1729 / 20.47 / 1240 / 14.68 / 350 / 4.14 / 8448
13.6-22.19 / 1511 / 10.37 / 2773 / 19.03 / 3586 / 24.60 / 3388 / 23.25 / 2391 / 16.41 / 926 / 6.35 / 14575
22.19-30.07 / 849 / 4.91 / 2691 / 15.55 / 3870 / 22.36 / 4513 / 26.07 / 3547 / 20.49 / 1839 / 10.63 / 17309
30.07-38.67 / 296 / 2.11 / 1428 / 10.17 / 2580 / 18.37 / 3943 / 28.07 / 3708 / 26.40 / 2092 / 14.89 / 14047
38.67-60.86 / 35 / 0.53 / 288 / 4.38 / 849 / 12.91 / 1637 / 24.90 / 2303 / 35.03 / 1443 / 21.95 / 6575
Aspect / Aspect and landslide susceptibility
Flat (-1) / 905 / 16.48 / 1157 / 21.06 / 1265 / 23.03 / 1234 / 22.46 / 681 / 12.40 / 251 / 04.57 / 5493
North (0-22.5) / 1020 / 16.15 / 1426 / 22.58 / 1372 / 21.72 / 1519 / 24.05 / 884 / 14.00 / 95 / 01.50 / 6316
Northeast (22.5-67.5) / 665 / 11.36 / 1310 / 22.38 / 1251 / 21.37 / 1338 / 22.86 / 1065 / 18.19 / 225 / 03.84 / 5854
East (67.5-112.5) / 491 / 07.41 / 1425 / 21.51 / 1739 / 26.25 / 1556 / 23.49 / 1014 / 15.31 / 399 / 06.02 / 6624
Southeast (112.5-157.5) / 331 / 04.25 / 1013 / 13.00 / 1674 / 21.49 / 1958 / 25.13 / 1735 / 22.27 / 1080 / 13.86 / 7791
South (157.5-202.5) / 209 / 02.63 / 871 / 10.97 / 1678 / 21.13 / 1995 / 25.13 / 2145 / 27.02 / 1042 / 13.12 / 7940
Southwest (202.5-247.5) / 119 / 01.63 / 742 / 10.18 / 1450 / 19.89 / 1928 / 26.45 / 2128 / 29.19 / 923 / 12.66 / 7290
West (247.5-292.5) / 46 / 01.00 / 414 / 09.39 / 968 / 21.95 / 1187 / 26.91 / 1195 / 27.09 / 601 / 13.63 / 4411
Northwest (292.5-337.5) / 44 / 00.98 / 306 / 06.79 / 926 / 20.55 / 1374 / 30.50 / 1089 / 24.17 / 766 / 17.00 / 4505
North (337.5-360) / 132 / 02.79 / 307 / 06.49 / 651 / 13.76 / 1131 / 23.91 / 1206 / 25.50 / 1303 / 27.55 / 4730
Relative Relief / Relative Relief and landslide susceptibility
64.48- 225.18 / 0 / 00.00 / 14 / 01.72 / 171 / 21.03 / 375 / 46.13 / 214 / 26.32 / 39 / 04.80 / 813
225.18 - 332.31 / 220 / 03.05 / 375 / 05.20 / 864 / 11.97 / 1927 / 26.70 / 2551 / 35.35 / 1279 / 17.72 / 7216
332.31 - 399.86 / 1289 / 06.43 / 3235 / 16.13 / 4453 / 22.20 / 4763 / 23.74 / 3985 / 19.87 / 2335 / 11.64 / 20060
399.86 - 465.07 / 1918 / 08.89 / 4177 / 19.37 / 5036 / 23.35 / 4999 / 23.18 / 3498 / 16.22 / 1937 / 08.98 / 21565
465.07 – 658.07 / 308 / 02.73 / 1265 / 11.19 / 2425 / 21.46 / 3251 / 28.77 / 2907 / 25.73 / 1144 / 10.12 / 11300
Lithology / Lithology and landslide susceptibility
Unclassified Crystallines / 532 / 5.39 / 1669 / 16.92 / 2595 / 26.31 / 2804 / 28.43 / 2023 / 20.51 / 240 / 2.43 / 9863
Slate, Schists, quartzite / 3381 / 9.27 / 7231 / 19.82 / 9003 / 24.68 / 8919 / 24.45 / 6006 / 16.47 / 1935 / 5.31 / 36475
Sandstone Shale/Clay / 0 / 0.00 / 106 / 0.74 / 1251 / 8.74 / 3386 / 23.65 / 5095 / 35.59 / 4433 / 30.97 / 14316
Geomorphology / Geomorphology and Landslide Susceptibility
Folded Ridge / 2701 / 14.87 / 4649 / 25.59 / 4542 / 25.01 / 3341 / 18.39 / 1946 / 10.71 / 985 / 5.42 / 18164
Piedmont Fan Plain / 1051 / 9.53 / 97 / 0.88 / 1021 / 9.25 / 2656 / 24.07 / 3794 / 34.39 / 2474 / 22.42 / 11033
Highly Dissected Hill Slope / 0 / 0.00 / 6758 / 21.28 / 6758 / 21.28 / 8490 / 26.73 / 6905 / 21.74 / 2846 / 8.96 / 31757
Land use/cover / Land use/cover and landslide susceptibility
Agricultural land / 71 / 06.17 / 181 / 15.74 / 265 / 23.04 / 272 / 23.65 / 267 / 23.22 / 94 / 08.17 / 1150
Fallow land / 14 / 06.45 / 32 / 14.75 / 80 / 36.87 / 76 / 35.02 / 10 / 04.61 / 5 / 02.30 / 217
Dense mixed jungle / 2495 / 05.38 / 6071 / 13.10 / 9430 / 20.34 / 11689 / 25.22 / 10803 / 23.30 / 5867 / 12.66 / 46355
Open mixed jungle / 662 / 09.85 / 1329 / 19.78 / 1588 / 23.63 / 1728 / 25.72 / 1098 / 16.34 / 314 / 04.67 / 6719
River / 126 / 04.60 / 286 / 10.45 / 565 / 20.64 / 782 / 28.57 / 711 / 26.07 / 257 / 09.39 / 2737
Settlement / 561 / 14.86 / 1150 / 30.47 / 993 / 26.31 / 650 / 17.22 / 313 / 08.29 / 107 / 02.84 / 3774
Soil / Soil and Landslide Susceptibility
W002 / 13 / 0.11 / 235 / 1.93 / 1452 / 11.89 / 2787 / 22.83 / 4490 / 36.78 / 3231 / 26.47 / 12208
W004 / 4384 / 14.02 / 734 / 2.35 / 10489 / 33.54 / 9890 / 31.62 / 5396 / 17.25 / 381 / 1.22 / 31274
W008 / 105 / 0.60 / 752 / 4.30 / 2715 / 15.54 / 4702 / 26.91 / 5209 / 29.81 / 3989 / 22.83 / 17472
NDVI / NDVI and landslide susceptibility
0.014 - 0.121 / 336 / 05.00 / 708 / 10.56 / 1372 / 20.46 / 1825 / 27.21 / 1592 / 23.74 / 865 / 12.90 / 6707
0.121 - 0.200 / 989 / 08.26 / 1842 / 15.38 / 2692 / 22.48 / 2939 / 24.54 / 2213 / 18.48 / 1301 / 10.86 / 11975
0.200 - 0.270 / 1339 / 09.30 / 2485 / 17.26 / 3059 / 21.24 / 3465 / 24.06 / 2754 / 19.13 / 1298 / 09.01 / 14400
0.270 - 0.340 / 922 / 06.95 / 2659 / 16.34 / 3355 / 20.61 / 3717 / 22.84 / 3778 / 23.21 / 1845 / 10.72 / 16275
0.340 - 0.500 / 349 / 03.00 / 1357 / 11.70 / 2448 / 21.11 / 3248 / 28.01 / 2854 / 24.61 / 1343 / 11.58 / 11597
Drainage Density / Drainage Density and Landslide Susceptibility
Very low / 1438 / 10.46 / 2399 / 17.45 / 3377 / 24.56 / 3030 / 22.03 / 2139 / 15.56 / 1368 / 9.95 / 13751
Low / 1285 / 06.00 / 3093 / 14.44 / 4593 / 21.44 / 5462 / 25.50 / 4378 / 20.44 / 2611 / 12.19 / 21422
Moderate / 1043 / 5.97 / 2611 / 14.94 / 3532 / 20.21 / 4487 / 25.67 / 3976 / 22.75 / 1829 / 10.46 / 17478
High / 176 / 2.20 / 889 / 11.09 / 1399 / 17.45 / 2136 / 26.64 / 2583 / 32.21 / 836 / 10.43 / 8019
Very high / 2 / 00.70 / 47 / 16.55 / 82 / 28.87 / 90 / 31.69 / 61 / 21.48 / 2 / 00.70 / 284
Elevation / Elevation and landslide susceptibility
166 - 483 / 87 / 00.61 / 641 / 04.52 / 1959 / 13.82 / 3716 / 26.21 / 4611 / 32.53 / 3161 / 22.30 / 14176
483 - 728 / 1691 / 09.60 / 2637 / 14.97 / 3499 / 19.86 / 4110 / 23.33 / 3565 / 20.22 / 2118 / 12.02 / 17620
728 - 996 / 974 / 06.94 / 2691 / 19.17 / 3510 / 25.00 / 3611 / 25.72 / 2781 / 19.81 / 474 / 03.38 / 14040
996 -1321 / 1077 / 09.39 / 2478 / 21.61 / 2891 / 25.22 / 2348 / 20.48 / 1296 / 11.30 / 618 / 05.39 / 11465
1321-1870 / 70 / 01.92 / 442 / 12.10 / 930 / 25.46 / 1236 / 33.84 / 775 / 21.22 / 208 / 5.69 / 3653