中小型原水河渠污染事故危害度应急评价模型

为了对中小型原水河渠污染事故危害影响程度进行综合评价,利用污染事故案例样本资料,在提出原水污染事故危害度概念基础上,归纳影响中小型原水河渠污染事故危害度的直接与间接影响因素,应用粗糙集理论与方法,对间接影响因素进行重要性分析、冗余约简及重要度权重计算,综合直接与间接影响因素的作用,构建中小型原水河渠污染事故的应急评价模型。以成都市原水河渠为例,设计模拟污染事故情景,对所构建模型进行分析,结果表明,模型能够反映中小型原水河渠污染事故的危害影响程度。所构建模型适用于中小型原水河渠污染事故的应急评价,可为应急响应决策提供支撑信息。

Emergency assessment model for the hazard extent of water pollution accidents in small and medium sized rivers

An emergency assessment model is developed for the hazard extent of water pollution accidents in small and mediumsized rivers.The model development uses the concept of the hazard extent of water pollution accidents and the result of typical case studies.The rough set theory is applied to analyze the importance of indirect factors, eliminate the redundancy, calculate the significance of weight, and integrate the influence of both direct and indirect factors.The model is applied to a river in Chengdu city.Different water pollution scenarios are designed for the model smiulations.Results show that the model is capable of assessing the hazard extent of water pollution accidents in small and medium sized rivers.Thus, the model is able to provide the valuable information for decision-making during the emergency of water pollution accidents.