分析了堤防系统的层次性及模糊性，在此基础上建立了堤防工程风险评价系统指标体系和评价结构模型。
Dike construction risk evaluation system and risk evaluation definition model are settled down with the analysis of dike construction hierarchy as well as fuzzy character.
文章依据风险系统理论，构建区域环境风险区划的层次结构模型与指标体系，提出区域环境风险综合指数由风险源危险性指数、控制机制有效性指数、受体易损性指数组成。
It was proposed that comprehensive index of regional environmental risk consists of the danger index of risk source, validity index of control mechanism and vulnerability index of risk receptor.
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