秋季阿什河流域上游水环境质量评价

阿什河流域上游是西泉眼水库的主要集水区,其水质状况直接影响到水库水质。2010年9月对阿什河流域上游8个断面的水质理化指标进行了检测,并运用单因子污染指数法与灰色关联评价法对阿什河流域上游水质进行了评价。结果表明：灰色关联评价法的结果显示8个断面中除R8为Ⅱ类水质外,其它断面均为Ⅰ类水质,断面水质较清洁。单因子污染指数法仅可反映出某种污染物的污染程度而不能反映出整个水体的污染程度;相比于单因子法,灰色关联评价法能充分利用环境监测数据,全面分析水体污染程度。灰色关联评价法优于单因素法,其评价结果更接近于阿什河上游流域水体的实际情况。

Water Environmental Quality Assessment of Upriver Sections of Ashi River in Autumn

As a spare water head site of domestic water resources for Harbin,The water quality of Xiquanyan Reservoir is closely related to water security of millions of citizens.The upstream of Ashi River basin is the main sub basin of Xiquanyan reservoir and its water quality directly affect water quality of the reservoir.The water quality in upper reaches of Ashi River was assessed by the methods of single factor pollution index and grey connecting evaluation method based on the monitored physical and chemical index of the water quality in September 2010.The results showed that the water quality in all sampling points was in GradeⅠexcept for R8（Grade Ⅱ）.Grey evaluation method was found superior to single-factor method for the evaluation,which was closer to the actual situation of upper Ash River basin.Single-factor pollution index only revealed pollution degree of certain pollutant instead of the whole water body.Meanwhile,the Gray evaluation method will take advantage of environmental monitoring data and comprehensively analyzed the water pollution better.