两阶段模糊法在水质评价中的应用——以嘉善县流域为例  

Application of Two-Stage Fuzzy Set Theory to Water Quality Evaluation of Rivers in Jiashan County

作　　者：王中凯[1,2] 梁秀娟[1,2] 杜川[1,2] 王亮[2,3] 姜志超[2,4] 

机构地区：[1]吉林大学地下水资源与环境教育部重点实验室,吉林长春130021 [2]吉林大学环境与资源学院,吉林长春130021 [3]吉林省科技职业学院,吉林长春130000 [4]黑龙江省九〇四水文地质工程地质勘察院,黑龙江哈尔滨150000

出　　处：《节水灌溉》2014年第9期34-37,共4页Water Saving Irrigation

基　　金：国家自然科学基金项目(41072171);"十一五"国家科技支撑计划项目专题(2008BAB42B07;2007BAB28B04-03);吉林省科技厅重点攻关项目(20100452)

摘　　要：采用两阶段模糊法对嘉善县河流水质进行评价,将国家地表水水质标准引入到聚类分析中,依据标准对原始数据进行分段线性归一化,将标准评级后作为模糊聚类中心,对评价对象进行聚类,得到替代原观测值的全局指标IRQ。从空间和时间两方面对所得的全局指标进行分析,分析结果表明嘉善县东南部区域水质污染较北部区域更为严重,年际间水质无明显改善,年内水质优劣比较:丰水期>平水期>枯水期。Two-stage fuzzy set theory was used to evaluate the water quality of rivers in Jiashan County. Unlike the traditional fuzzy clustering methods, in this study, the original data were first piecewise linearly normalized according to the national surface water quality standards. The standards were rated as fuzzy cluster centers and the objects were classified. Then an overall index, i.e. the river quality index （I RQ）, was constructed to represent the original monitoring data. The results indicated that water pollution in southeast region was more serious than that in the northern region, and the sequence of water quality from good to bad in a year was wet period, flat water period, dry season.

关 键 词：两阶段模糊法 水质评价 模糊聚类中心 全局指标 

分 类 号：X132[环境科学与工程—环境科学]