A Fuzzy Clustering Logic Life Loss Risk Evaluation Model for Dam-Break Floods

Table 1

Degree of understanding.

Level	Degree	Description
I	Fuzzy	When people receive the flood warning, they cannot correctly understand the severity of this flood, fail to thoroughly understand and properly estimate the downstream flood propagation extent and its resulting damage to the downstream areas, are unable to estimate the effective escaping time before the flood arrives, fail to respond properly to escape successfully, and fail to determine possible escape routes and measures
II	Half-fuzzy	People have vague understanding of the flood severity by the time they receive the warning messages, have vague awareness of the damage to the downstream drainage systems by the flood but not accurately estimate the damage extent, and know they should take timely measures to escape and choose an escape route but cannot manage to choose the best path and the best measures
III	Half-definite	People receiving the flood alert have better understanding of the flood severity, have a more specific estimation on the downstream flood damage degree, and know they should choose escape routes and escape measures and make necessary preferential choices for this scope of drainage
IV	Definite	When people receive the risk warning, they have an accurate understanding of the flood and an accurate estimation of the flood damage extent to the downstream areas and can effectively select the most effective escape route and the escape measures to successfully evacuate