中文摘要：

以扎龙湿地克钦湖水体重金属监测资料为基础,在湖内均匀布设了12个采样点,用电感耦合等离子体质谱仪法测定各点的重金属质量浓度。水体中Mn、Cu、Cd、As、Pb和Se的平均质量浓度分别为2.23 mg/L、0.65 mg/L、0.12 mg/L、5.98 mg/L、0.48 mg/L、0.13 mg/L。应用灰色关联分析方法和内梅罗水污染指数法综合评价克钦湖的水环境质量。结果表明： 灰色关联分析方法体现了各评价因子的综合影响,得出克钦湖总体达到Ⅴ类水质标准,水体受到严重污染;内梅罗指数法反映了各重金属元素的污染程度,由大到小依次为As、Mn、Pb、Se、Cd、Cu。应用两种方法从不同角度分析水体重金属的污染程度,并得出污染原因,最后提出扎龙湿地克钦湖生态环境保护对策。

英文摘要：

The paper is aimed at introducing the grey relation analysis and Nemerow pollution index in water quality evaluation for heavy metals in Keqin Lake in hoping to improve the environmental quality of the Lake water. For our research purpose, we have chosen 12 well-distributed sampling points for the investigation and monitoring. Specifically speaking, we have measured heavy-metal content in each kind of sampling metals by using ICP-MS. The average content of such heavy metals, such as that of Mn, Cu, Cd, As, Pb and Se has been worked out respectively as 2.23 mg/L, 0.65 mg/L, 0.12 mg/L, 5.98 mg/L, 0.48 mg/L and 0.13 mg/L. At the same time, we have made a comprehensive evaluation of the water quality in the lake through the gray correlation analysis and Nemerow pollution index. The result of our investigation shows that the gray correlation analysis has indeed reflected the comprehensive influence of all the factors, which help to determine if the water has reached the expected quality of the standard five level grades. When the toxic index is used to report the contaminant degree of each heavy metal toxic element, it has been found that the contamination sequence for heavy metals stands for： As〉 Mn〉 Pb〉 Se〉 Cd〉 Cu. In regard to the results of the two different methods, we have analyzed the contaminant degree of the water due to the heavy metals from different points of view, for example, from the contaminated results, or judging by the pollutant sources. At the same time, we have also made a contrastive analysis over the advantages and disadvantages of the methods we have adopted. As to the grey relational grades, it has to be pointed out that it is the chief pollution factors that lead to the lake water pollution. The results of our application of the analysis method prove that the method we have developed is rational and feasible, for the evaluation results are in conformity with the actually tested quality of the corresponding groundwater. And, finally, we have brought forward necessary countermeasure