京杭大运河苏州高新区段水质污染状况研究

以2005—2010年京杭大运河苏州高新区段水质监测数据为基础,运用内梅罗综合污染指数法以及采取方差分析对京杭大运河苏州高新区段水质的主要污染因子及其变化趋势进行了研究,并对京杭大运河水质污染状况进行了综合评价。结果表明:京杭大运河苏州高新区段主要污染物为氨氮、总磷;氨氮浓度在2006—2010年间虽有明显下降,但仍超过《地表水环境质量标准》(GB3838—2002)IV类水质要求,为劣V类水,总磷亦有明显下降,但在2008—2010年3年间其浓度略有波动,在IV类和V类水质之间浮动;2005—2008年间其水质处于污染状态,2009—2010年水质较好,为轻污染。该研究结果可为苏州高新区河流水环境治理提供科学依据。

Water Quality at the Section of Suzhou High-tech Zone of the Beiiing-Hangzhou Grand Canal

Based the monitoring data of the section of Suzhou High-tech Zone of the Beijing-Hangzhou Grand Canal in 2005—2010 as the foundation,this paper uses Nemerow comprehensive pollution index and variance analysis to analyze the main pollution factors and their trends of this section and evaluate the water quality pollution of the Grand Canal.The results show that the main pollutants of this section are ammonia nitrogen and phosphorus.Although the concentration of ammonia nitrogen declined obviously in 2006—2010,it was still higher than that by the water quality requirements for Class IV water and it belonged to bad Class V water.The total phosphorus concentration also dropped significantly,but it was not stable,varying between Class IV and Class V water quality.Besides,the results also turn out that the water quality was in the pollution state in 2005—2008 and it was relatively good in 2009—2010.The research results can provide scientific evidence for the river water environment management of Suzhou High-tech Zone.