天津市主要河流水质调查与评价

利用综合评价法对天津市的8条主要河流：海河、北运河、潮白新河、北京排污河、永定新河、蓟运河、子牙新河、独流减河2007年的水质监测数据进行了评价。结果表明：除Cr污染较轻外，大部分指标超过地表水环境质量标准V类水质标准，其中几种污染物严重超标，表明天津市主要河流污染严重；从综合污染指数和污染分担率来看，各河流重金属污染指数和分担率均较高，且高于富营养化指数和分担率，表明天津市河流主要受工业污染。

Investigation and Evaluation of Water Quality for Main Rivers in Tianjin

Water quality monitoring data in 2007 of eight main rivers in Tianjin was evaluated by using comprehensive evaluation method, including Hal River, Beiyun River, Chaobaixin River, Beijingpaiwu River, Yongdingxin River, Jiyun River, Ziyaxin River and Duliujian River. The resuhs showed that most indexes exceeded the grade V of Surface Water Environmental Quality Standard except Cr, and the content of some pollutants was far beyond the standard level. It indicated that the eight rivers were polluted badly. Pollution index and share rate of heavy metals were more serious than those of eutrophication from aspects of integrated pollution index and pollution share rate. It indicated that the rivers were mainly polluted by industry.