Debris Flow Risk Assessment Method Based on Combination Weight of Probability Analysis

Table 1

Basic data statistics table of 72 debris flows [21].

Samples	Loose source material reserves (10^3 m^3)	Basin area (km^2)	Drainage density (km^−1)	Basin relative relief (km)	Shifting bed proportion (%)	Main channel length (km)
#1	0.04	2.5	19.32	1.6	0.48	2.06
#2	39.04	13.9	21.85	1.4	0.5	4.03
#3	43.65	10.3	20.21	1.4	0.72	3.89
#4	728.2	7.8	25.17	1.46	0.85	4.1
#5	79.5	4.5	15.89	0.98	0.64	3.35
#6	385.95	12.2	24.5	1.36	0.85	5.88
#7	104.5	1.8	28.17	1.04	0.86	1.38
#8	240.45	10	22.71	1.56	0.76	5.39
#9	50.2	1.9	25.68	1.1	0.48	1.36
#10	2.4	2.4	18.63	1.14	0.23	1.78
#11	1500	1.6	44.06	1.12	0.61	3.32
#12	242	0.5	18.6	0.46	0.84	0.73
#13	160.7	0.8	17.38	0.66	0.72	1.09
#14	6.6	7.5	22.55	1.38	0.39	2.86
#15	4.8	4.6	21.33	0.86	0.54	1.99
#16	73.2	21.8	21.67	2.04	0.42	7.82
#17	2.85	5.7	20.47	1.92	0.37	3.05
#18	14.7	6.8	21.79	1.8	0.4	2.55
#19	109.3	23.2	23.24	2.3	0.61	7.49
#20	35	10.6	19.05	1.68	0.47	4.25
#21	160.34	16	23.43	1.04	0.51	5.89
#22	60	3.5	22.94	1.24	0.65	2.25
#23	70.6	0.7	16.29	0.96	0.61	1.43
#24	40.53	0.7	19.86	1	0.81	1.36
#25	163.32	18.7	22.6	1.68	0.76	5.91
#26	0.89	0.9	27.56	0.72	0.43	1.36
#27	60	1.2	22.5	0.86	0.41	1.45
#28	26.2	1	19.5	0.6	0.62	1.32
#29	1016.4	0.8	21.5	0.88	0.86	1.15
#30	1967.9	15.7	20.89	1.22	0.84	5.97
#31	378.24	21.4	24.7	1.5	0.76	7.42
#32	199	8.7	27.37	1.36	0.6	2.83
#33	101.63	9.9	25.09	1.7	0.58	4.59
#34	40.2	1.2	27.58	0.82	0.81	1.45
#35	74	1.1	26.18	0.75	0.69	1.05
#36	119.3	17.6	20.65	1.66	0.56	7.62
#37	15.55	2.7	23.33	1.22	0.45	2.89
#38	54	2.6	27.12	1.26	0.41	3.13
#39	67.44	0.8	19.38	0.82	0.82	1.22
#40	107.3	0.6	16.67	0.67	0.73	0.99
#41	33.54	2.2	25.45	0.74	0.57	2.09
#42	106.5	0.3	10.67	0.52	0.76	0.66
#43	3.36	0.7	27.86	0.55	0.47	2.09
#44	4.13	2.8	18.79	1	0.47	2.35
#45	51.8	1.1	28.09	0.59	0.46	0.99
#46	12.14	0.5	18.4	0.92	0.52	1.15
#47	10.8	1.4	21.43	0.98	0.47	1.06
#48	507	1.1	24.91	0.58	0.79	1.15
#49	120.08	1.8	19.56	1.04	0.89	1.35
#50	15.98	3.1	20.1	0.84	0.51	2.54
#51	30	3.5	21.74	0.82	0.75	1.8
#52	114	24.6	20.84	1.22	0.64	8.1
#53	14.26	2.8	20.82	1.12	0.7	1.56
#54	33	4.1	19.63	1.09	0.46	3.64
#55	900.03	22.2	22.05	1.7	0.44	11.36
#56	210	3.6	21.25	1.2	0.96	3.12
#57	1000.1	7	21.8	1.22	0.87	4.02
#58	485	2.5	21.8	1	0.81	1.97
#59	931.24	23.1	21.34	1.2	0.66	9.88
#60	12.21	4	18.98	1.03	0.53	2.56
#61	34.08	16	20.99	1.28	0.39	5.91
#62	0.08	11.7	22.03	1.08	0.21	4.74
#63	16.8	5.4	19.57	1.46	0.4	3.02
#64	98.5	22.7	26.04	1.86	0.76	7.66
#65	67.2	2.5	18.12	1.02	0.83	1.32
#66	17.5	1.5	20.93	1.24	0.9	1.75
#67	93.3	2.8	21.36	1.3	0.78	2.75
#68	50.8	7.3	20.68	1.2	0.84	3.91
#69	135.57	26.4	21.93	1.8	0.67	8.46
#70	14.66	2.8	29.96	1.34	0.82	2.29
#71	8.95	10.9	20.11	1.5	0.57	4.12
#72	97.82	17.1	19.64	1.28	0.7	6.43