The flood risk assessment grading systems composed of 4 first-grade factors and 14 second-grade factors are established based on Delphi method.
采用特尔菲法，选择4个一级因子和14个二级因子，建立洪灾风险评价等级指标体系。
The flood risk assessment grading systems composed of 4 first-grade factors and 14 second-grade factors are established based on Delphi method.
采用特尔菲法，选择4个一级因子和14个二级因子，建立洪灾风险评价等级指标体系。
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