GIS-Based Landslide Susceptibility Mapping Using Information, Frequency Ratio, and Artificial Neural Network Methods in Qinghai Province, Northwestern China

Table 3

Calculations of IM and FR of various evaluation factors.

Factors	Subclass	IM	FR
Elevation	1795–2788 m	0.478	1.321
	2788–2970 m	0.673	1.433
	2970–3128 m	0.195	1.115
	3128–3297 m	−0.237	0.876
	3297–3491 m	−0.398	0.775
	3491–3709 m	−0.786	0.306
	3709–3964 m	−1.231	0.205
	3964–4243 m	−1.432	0.114
	4243–4885 m	−2.075	0.101
Slope angle	0–6.52°	−0.121	0.506
	6.53–12.72°	0.265	1.121
	12.73–18.26°	0.431	1.045
	18.27–23.16°	0.591	1.231
	23.17–27.72°	0.375	1.033
	27.73–32.29°	0.115	0.897
	32.3–37.51°	−0.153	0.555
	37.52–55.77°	−0.271	0.246
	55.78–83.17°	−0.489	0.387
Slope aspect	0–40°	−0.793	0.831
	40–80°	−0.323	1.031
	80–120°	0.051	1.056
	120–160°	−0.115	0.836
	160–200°	0.391	1.154
	200–240°	0.105	1.038
	240–280°	−0.203	1.016
	280–320°	−0.315	1.114
	320–360°	−0.256	0.983
Plane curvature	−16.38–−5.21	0.135	1.178
	−5.21–−1.59	0.003	1.045
	−1.58–−0.97	0.106	1.036
	−0.96–−0.46	0.117	1.187
	−0.45–−0.15	0.786	0.709
	−0.14–0.16	1.532	0.778
	0.17–0.47	0.975	0.613
	0.48–0.99	0.398	1.077
	1–9.99	0.449	0.832
Profile curvature	−9.46–−1.25	−0.451	0.561
	−1.25–−0.62	−0.232	0.876
	−0.63–−0.27	0.124	1.139
	−0.26–0.09	0.108	0.936
	0.1–0.46	0.549	0.787
	0.47–0.95	0.938	1.259
	0.96–1.69	0.225	1.015
	1.7–5.48	−0.331	0.897
	5.49–21.78	−0.261	0.732
Stratigraphic lithology	Pt1	−2.121	0.325
	Pt2	−1.589	0.446
	Q1	1.395	1.035
	Q2	1.322	1.153
	Q3	0.876	1.087
Distance to river	0–333 m	1.231	2.357
	333–728 m	1.053	1.753
	728–1143 m	−0.113	1.156
	1143–1559 m	−1.452	0.797
	1559–2017 m	−1.121	0.568
	2017–2557 m	−1.643	0.321
	2557–3202 m	−2.152	0.253
	3202–4033 m	−1.988	0.118
	>4033 m	−2.223	0.074
Distance to fault	0–1127 m	2.156	3.754
	1127–2361 m	1.986	2.531
	2361–3595 m	0.993	1.674
	3595–4829 m	0.635	1.152
	4829–6064 m	0.141	1.041
	6064–7405 m	−0.241	0.93
	7405–8854 m	−0.764	0.87
	8854–10732 m	−1.653	0.551
	>10732 m	−2.229	0.324
NDVI	−0.251–−0.051	1.532	1.986
	−0.05–−0.004	2.11	2.321
	−0.003–0.020	2.563	3.267
	0.021–0.043	0.648	1.323
	0.044–0.065	−0.613	0.976
	0.066–0.083	−0.787	0.815
	0.084–0.1	−0.218	0.693
	0.101–0.116	−1.131	0.556
	0.117–0.269	−2.153	0.323
TWI	3.51–5.66	−0.881	0.653
	5.67–6.67	0.112	1.132
	6.68–7.6	0.308	1.512
	7.61–8.53	0.235	1.073
	8.54–9.61	1.568	3.151
	9.62–10.9	1.332	2.312
	10.91–12.47	0.863	1.457
	12.48–14.62	0.151	1.032
	14.63–21.79	0	0
Distance to road	0–382 m	2.132	4.273
	382–819 m	0.876	1.182
	8191–283 m	0.231	0.998
	1283–1774 m	−0.115	0.693
	1774–2348 m	−0.289	0.671
	2348–3085 m	−0.787	0.773
	3085–4068 m	−0.563	0.712
	4068–5269 m	−1.132	0.683
	>5269 m	−2.225	0.312