投影寻踪法在再生水利用风险评价中的应用

Application of Projection Pursuit Method in Risk Assessment of Reclaimed Water

为全面反映再生水利用风险,以健康风险、经济风险和生态环境风险3个因素为准则层,选取12个相关评价指标作为评价再生水资源利用风险的指标确定评价标准,并以重庆市、四川省、贵州省和云南省为例,采用投影寻踪法对其再生水利用风险进行评价,利用遗传算法进行最佳投影方向向量的求解。结果表明,重庆市和四川省的再生水利用风险较高,贵州省的再生水利用风险较低,云南省的再生水利用风险低,评价结果与实际情况相符,可见投影寻踪法评价城市再生水利用风险可行、有效。

In order to comprehensively reflect the risk assessment of reclaimed water,twelve related evaluation factors were selected to establish the risk assessment index system of the reclaimed water by taking the health,economic and ecological environment risks as the criteria layer.Taking Chongqing City,Sichuang,Guizhou and Yunan Province as an example,projection pursuit model was used to evaluate the risk of the reclaimed water,and the genetic algorithm was adopted to calculate the optimal projection direction vector.The results show that the risk of the reclaimed water in Chongqing City and Sichuang Province are higher while that of Guizhou and Yunnan Province are lower.The evaluation results of projection pursuit model are consistent with the actual situation.Therefore,the proposed method is efficient and accurate for evaluation risk of urban reclaimed water.