Landslide susceptibility mapping based on landslide history and analytic hierarchy process (AHP),

Natural Hazards,

Dimitrios Myronidis, Charalambos Papageorgiou, Stavros Theophanous,

Department of Forestry and Natural Environment, Aristotle University of Thessaloniki, University Campus 54124, Po Box 268, Thessaloniki, Greece

Appendix Table 1 modified Landslide relative frequency (mLRF) calculation for the different landslide instability factors and classes

Landslide instability factors / Classes / Landslide area (km2) / Landslide Frequency % (LF) / Class area (km2) / Class area (CA) % / modified Landslide Relative Frequency mLRF /
1.Land cover / 1.1.2 Discontinuous urban fabric / 0.88 / 1.17% / 13.01 / 2.89% / 0.032
1.2.1 Industrial or commercial units / 0.01 / 0.02% / 1.37 / 0.30% / 0.003
1.2.2 Road and rail networks and associated land / 0.16 / 0.04% / 0.000
1.3.1 Mineral extraction sites / 0.06 / 0.07% / 1.98 / 0.44% / 0.014
1.3.2 Dump sites / 0.03 / 0.04% / 0.35 / 0.08% / 0.040
1.4.2 Sport and leisure facilities / 0.07 / 0.02% / 0.000
2.1.1 Non-irrigated arable land / 15.66 / 20.82% / 82.40 / 18.29% / 0.089
2.1.2 Permanently irrigated land / 0.09 / 0.12% / 0.72 / 0.16% / 0.059
2.2.1 Vineyards / 6.17 / 8.21% / 23.50 / 5.22% / 0.123
2.2.2 Fruit trees and berry plantations / 0.24 / 0.33% / 3.13 / 0.69% / 0.036
2.2.3 Olive groves / 0.00 / 0.00% / 0.79 / 0.18% / 0.000
2.4.1 Annual crops associated with permanent crops / 3.88 / 5.16% / 14.22 / 3.16% / 0.128
2.4.2 Complex cultivation patterns / 15.24 / 20.27% / 69.18 / 15.35% / 0.103
2.4.3 Land principally occupied by agriculture, with
significant areas of natural vegetation / 10.49 / 13.95% / 48.75 / 10.82% / 0.101
3.1.1 Broad-leaved forest / 0.01 / 0.01% / 0.27 / 0.06% / 0.017
3.1.2 Coniferous forest / 0.90 / 1.19% / 18.36 / 4.07% / 0.023
3.2.1 Natural grasslands / 9.02 / 12.00% / 54.89 / 12.18% / 0.077
3.2.3 Sclerophyllous vegetation / 10.07 / 13.39% / 92.95 / 20.63% / 0.051
3.2.4 Transitional woodland-shrub / 2.18 / 2.90% / 14.37 / 3.19% / 0.071
3.3.1 Beaches, dunes, sands / 0.12 / 0.16% / 5.44 / 1.21% / 0.010
3.3.3 Sparsely vegetated areas / 0.14 / 0.19% / 3.15 / 0.70% / 0.021
5.1.2 Water bodies / 1.56 / 0.35% / 0.000
2.Slope angle / 00-100 / 10.62 / 14.12% / 116.58 / 25.87% / 0.091
110-200 / 15.94 / 21.20% / 86.57 / 19.21% / 0.184
210-300 / 24.29 / 32.30% / 104.18 / 23.12% / 0.233
310-400 / 12.97 / 17.25% / 63.36 / 14.06% / 0.204
410-500 / 5.75 / 7.65% / 35.38 / 7.85% / 0.162
>510 / 5.62 / 7.47% / 44.55 / 9.89% / 0.126
3.Slope aspect / N (337.5 - 22.5) / 18.71 / 24.88% / 135.67 / 30.11% / 0.097
NE (22.5 - 67.5) / 5.95 / 7.91% / 29.45 / 6.54% / 0.142
E (67.5 - 112.5) / 7.68 / 10.21% / 35.95 / 7.98% / 0.150
SE (112.5 - 157.5) / 9.25 / 12.30% / 43.94 / 9.75% / 0.148
S (157.5 - 202.5) / 7.87 / 10.47% / 47.65 / 10.57% / 0.116
SW (202.5 - 247.5) / 7.29 / 9.70% / 53.04 / 11.77% / 0.097
W (247.5 - 292.5) / 7.97 / 10.60% / 54.83 / 12.17% / 0.102
NW (292.5 - 337.5) / 10.47 / 13.92% / 50.09 / 11.12% / 0.147
4.Elevation (m) / 0-200 m / 4.40 / 5.86% / 69.58 / 15.44% / 0.051
201-400 m / 27.62 / 36.73% / 180.71 / 40.10% / 0.124
401-600 m / 31.08 / 41.34% / 141.78 / 31.46% / 0.178
601-800 m / 8.52 / 11.33% / 46.49 / 10.32% / 0.149
801-1,000 m / 2.70 / 3.59% / 9.40 / 2.09% / 0.233
1001-1,200 m / 0.87 / 1.15% / 2.66 / 0.59% / 0.264
5.LS / 0.03-2.106 / 15.64 / 20.80% / 146.41 / 32.49% / 0.100
2.107-5.214 / 30.10 / 40.03% / 159.75 / 35.45% / 0.177
5.215-8.982 / 18.86 / 25.08% / 89.55 / 19.87% / 0.198
8.983-14.249 / 7.50 / 9.97% / 38.08 / 8.45% / 0.185
14.25-22.854 / 2.56 / 3.40% / 13.86 / 3.08% / 0.173
22.855-87.673 / 0.53 / 0.70% / 2.97 / 0.66% / 0.167
6. Geological structure / Basal group / 0.15 / 0.20% / 4.32 / 0.96% / 0.017
Sheeted Dykes (Diabase) / 0.08 / 0.11% / 1.01 / 0.22% / 0.039
Alluvium - Colluvium / 2.15 / 2.86% / 25.53 / 5.67% / 0.042
Amphibolites / 0.01 / 0.01% / 0.91 / 0.20% / 0.005
Bentonitic clays / 9.67 / 12.86% / 43.52 / 9.66% / 0.110
Bentonitic clays interstratified with tuffaceous sandstone / 0.07 / 0.09% / 2.97 / 0.07% / 0.012
Debrites / 10.81 / 14.38% / 41.73 / 9.26% / 0.129
Chalks, marls / 26.66 / 35.46% / 140.72 / 31.23% / 0.094
Sheet lava flows / 0.31 / 0.41% / 11.75 / 2.61% / 0.013
Olivine / 0.55 / 0.73% / 4.58 / 1.02% / 0.060
Limestones / 3.00 / 0.67% / 0.000
Marly Chalks / 3.82 / 5.08% / 44.53 / 9.88% / 0.043
Reef Limestones / 0.04 / 0.05% / 1.77 / 0.39% / 0.011
Gypsum / 0.09 / 0.12% / 0.50 / 0.11% / 0.089
Sandstones / 0.39 / 0.52% / 6.54 / 1.45% / 0.030
Terrace deposits / 0.07 / 0.09% / 8.76 / 1.94% / 0.004
Siltstones / 12.61 / 16.77% / 45.59 / 10.12% / 0.137
Lava breccias / 5.28 / 7.02% / 30.69 / 6.81% / 0.085
Olivine - and pyroxene / 1.29 / 1.72% / 20.11 / 4.46% / 0.032
Serpentinite / 1.14 / 1.52% / 12.09 / 2.68% / 0.047
7.Soil types / skeletic - leptic - REGOSOLS / 21.33 / 28.37% / 93.87 / 20.83% / 0.165
vertic - leptic - CAMBISOLS / 21.92 / 29.15% / 104.82 / 23.26% / 0.152
gypsiric-REGOSOLS / 0.35 / 0.47% / 0.94 / 0.21% / 0.271
eutric-lithic-LEPTOSOLS / 0.77 / 1.02% / 28.49 / 6.32% / 0.020
lithic-LEPTOSOLS / 0.22 / 0.29% / 11.19 / 2.48% / 0.014
calcaric-lithic-LEPTOSOLS / 0.36 / 0.48% / 7.82 / 1.74% / 0.034
epipetric-CALCISOLS / 0.29 / 0.39% / 14.50 / 3.22% / 0.015
calcic-LUVISOLS / 0.01 / 0.01% / 1.03 / 0.23% / 0.007
skeletic-calcaric-REGOSOLS / 21.69 / 28.85% / 142.79 / 31.69% / 0.111
calcaric-rendzic-LEPTOSOLS / 7.75 / 10.31% / 37.77 / 8.38% / 0.149
calcaric-fluvic-CAMBISOLS / 0.00 / 0.00% / 0.84 / 0.19% / 0.000
calcaric-CAMBISOLS / 0.70 / 0.16% / 0.000
eutric-chromic-VERTISOLS / 0.50 / 0.66% / 5.86 / 1.30% / 0.062
8. Mean annual rainfall (mm) / 450 mm / 1.22 / 1.62% / 35.84 / 7.95% / 0.047
451–500 mm / 6.57 / 8.74% / 89.16 / 19.79% / 0.101
501–550 mm / 21.59 / 28.71% / 133.78 / 29.69% / 0.221
551–600 mm / 38.57 / 51.30% / 158.49 / 35.17% / 0.334
601mm / 7.24 / 9.63% / 33.35 / 7.40% / 0.298
9. Distance from drainage (m) / 0-50 m / 22.92 / 30.48% / 135.72 / 30.12% / 0.202
51-100 m / 18.48 / 24.58% / 110.98 / 24.63% / 0.199
101-150 m / 13.32 / 17.72% / 77.5 / 17.20% / 0.206
151-200 m / 8.53 / 11.34% / 49.23 / 10.92% / 0.207
201 m / 11.94 / 15.88% / 77.19 / 17.13% / 0.185
10. Distance from roads (m) / 0-50 m / 13.75 / 18.29% / 81.69 / 18.13% / 0.245
51-150 m / 20.39 / 27.12% / 120.37 / 26.71% / 0.251
151-200 m / 7.36 / 9.79% / 43.76 / 9.71% / 0.253
>201 m / 33.69 / 44.81% / 204.80 / 45.45% / 0.251