Risk Evaluation of Debris Flow Hazard Based on Asymmetric Connection Cloud Model

Table 1

Debris flow risk classification standard for evaluation indicators.

Category	Low risk (I)	Medium risk (II)	High risk (III)	Extremely high risk (IV)
C1/10^4 m^3	≤1	1~10	10~100	≥100
C2/%	≤10	10~50	50~100	≥100
C3/km^2	≤0.5	0.5~10	10~35	≥35
C4/km	≤1	1~5	5~10	≥10
C5/km	≤0.2	0.2~0.5	0.5~1.0	≥1.0
C6/(km/km^2)	≤5	5~10	10~20	≥20
C7	≤1.1	1.1~1.25	1.25~1.4	≥1.4
C8	≤0.1	0.1~0.3	0.3~0.6	≥0.6
C9/mm	≤25	25~50	50~100	≥100
C10/population/km^2	≤50	50~150	150~250	≥250