GIS-Based Landslide Susceptibility Mapping Using Frequency Ratio and Shannon Entropy Models in Dejen District, Northwestern Ethiopia

Table 2

Spatial relationship between each conditioning factor and landslide occurrence using FR and SE models.

Conditioning factors	Classes	Class pixels	%Class pixels	Landslide pixels	%Landslide pixels	FR	SE
							Pij	Hj	Hjmax	Ij	Wj
Slope (degree)	0–9.53	292995	45.924	115	7.377	0.161	0.005	2.244	2.807	0.201	0.964
	9.53–19.07	200398	31.411	340	21.809	0.694	0.021
	19.07–28.61	88419	13.859	438	28.095	2.027	0.060
	28.61–38.14	38689	6.064	371	23.797	3.924	0.117
	38.14–47.68	14084	2.208	202	12.957	5.869	0.175
	47.68–57.21	3110	0.487	86	5.516	11.316	0.337
	57.21–66.75	298	0.047	7	0.449	9.613	0.286
Elevation (m)	991–1215	17080	2.677	25.000	1.604	0.599	0.067	2.525	2.807	0.101	0.129
	1215–11439	104637	16.401	178.000	11.418	0.696	0.078
	1439–1663	91542	14.348	271.000	17.383	1.211	0.135
	1663–1887	72600	11.379	279.000	17.896	1.573	0.175
	1887–2111	60986	9.559	279.000	17.896	1.872	0.209
	2111–2335	55289	8.666	371.000	23.797	2.746	0.306
	2335–2559	235859	36.969	156.000	10.006	0.271	0.030
Aspect (direction)	Flat (−1)	43329	6.791	14	0.898	0.132	0.015	2.845	3.322	0.144	0.129
	North (0–22.5)	72892	11.425	39	2.502	0.219	0.024
	North east (22.5–67.5)	86215	13.513	154	9.878	0.731	0.082
	East (67.5–112.5)	80684	12.647	369	23.669	1.872	0.209
	South east (112.5–157.5)	66712	10.457	350	22.450	2.147	0.239
	South (157.5–202.5)	67903	10.643	270	17.319	1.627	0.181
	South west (202.5–247.5)	77019	12.072	217	13.919	1.153	0.129
	West (247.5–292.5)	67670	10.607	97	6.222	0.587	0.065
	Nort-west (292.5–337.5)	42777	6.705	38	2.437	0.364	0.041
	North (337.5–360)	32792	5.140	11	0.706	0.137	0.015
LULC	Water body	569	0.089	1	0.064	0.719	0.135	2.470	2.585	0.045	0.039
	Forest area	10748	1.684	24	1.539	0.914	0.172
	Agricultural area	290487	45.523	784	50.289	1.105	0.208
	Scrub/shrub	282013	44.195	707	45.350	1.026	0.193
	Built up area	51411	8.057	34	2.181	0.271	0.051
	Bare land	2879	0.451	9	0.577	1.280	0.241
Curvature	Concave (−14.19–(−4.07)	2037	0.319	44	2.822	8.840	0.446	1.230	1.585	0.224	1.481
	Flat (−4.07) –(6.04)	635507	99.610	1504	96.472	0.968	0.049
	Convex (6.04–16.16)	449	0.070	11	0.706	10.026	0.505
NDVI (ratio)	(−0.1)–0.07	8655	1.357	58	3.720	2.742	0.271	2.972	3.170	0.063	0.070
	0.07–0.09	61467	9.634	112	7.184	0.746	0.074
	0.09–0.11	100884	15.813	186	11.931	0.755	0.074
	0.11–0.13	130483	20.452	243	15.587	0.762	0.075
	0.13–0.15	125227	19.628	299	19.179	0.977	0.096
	0.15–0.17	109386	17.145	349	22.386	1.306	0.129
	0.17–0.20	67951	10.651	240	15.394	1.445	0.143
	0.20–0.24	27246	4.271	65	4.169	0.976	0.096
	0.24–0.45	6694	1.049	7	0.449	0.428	0.042
Distance from road (m)	0–1808.02	217352	34.068	365	23.412	0.687	0.144	2.252	2.585	0.129	0.103
	1808.02–3616.04	145198	22.759	583	37.396	1.643	0.344
	3616.04–5424.06	132792	20.814	416	26.684	1.282	0.268
	5424.06–7232.08	90241	14.145	161	10.327	0.730	0.153
	7232.08–9040.10	39954	6.262	30	1.924	0.307	0.064
	9040.10–10848.12	12456	1.952	4	0.257	0.131	0.027
Distance from river (m)	0–500	224027	35.114	707	45.350	1.291	0.203	2.256	2.585	0.127	0.135
	500–1000	186094	29.169	405	25.978	0.891	0.140
	1000–1500	135052	21.168	236	15.138	0.715	0.112
	1500–2000	69937	10.962	98	6.286	0.573	0.090
	2000–2500	17047	2.672	109	6.992	2.617	0.411
	>2500	5836	0.915	4	0.257	0.280	0.044
Distance from faults (m)	0–500	131605	20.590	819	52.534	2.551	0.474	2.010	2.322	0.134	0.145
	500–1000	94857	14.841	195	12.508	0.843	0.157
	1000–1500	90898	14.221	177	11.353	0.798	0.148
	1500–2000	81261	12.713	168	10.776	0.848	0.158
	>2000	240550	37.635	200	12.829	0.341	0.063
TWI	2.59–4.61	46390	7.271	345	22.130	3.043	0.172	1.966	2.807	0.300	0.758
	4.61–6.63	367920	57.668	804	51.572	0.894	0.051
	6.63–8.66	156410	24.516	242	15.523	0.633	0.036
	8.66–10.68	52382	8.210	125	8.018	0.977	0.055
	10.68–12.70	13129	2.058	39	2.502	1.216	0.069
	12.70–14.72	1722	0.270	3	0.192	0.713	0.040
	14.72–16.74	40	0.006	1	0.064	10.231	0.578
Rainfall (mm)	1335.13–1350.19	27659	4.335	135	8.659	1.997	0.261	2.682	2.807	0.045	0.049
	1350.19–1365.25	69387	10.876	232	14.881	1.368	0.179
	1365.25–1380.31	84450	13.237	156	10.006	0.756	0.099
	1380.31–1395.37	78482	12.301	81	5.196	0.422	0.055
	1395.37–1410.43	108772	17.049	264	16.934	0.993	0.130
	1410.43–1425.48	155896	24.435	390	25.016	1.024	0.134
	1425.48–1440.54	113347	17.766	301	19.307	1.087	0.142