摘要：以东昌湖6个湖区为研究对象,选取挥发酚、氰化物、砷、铬(VI)、铅、镉、石油类7项优先污染物,采用单因子指数以及内梅罗指数法,对东昌湖污染物年际变化进行定量分析,得出挥发酚、砷、铅的单因子指数在0.001—0.5之间呈波动中下降趋势,而氰化物、镉、铬(VI)单因子指数在0.01—0.1之间呈波动上升的趋势,但均符合地表水环境质量标准(GB3838-2002)Ⅳ类水水质标准。内梅罗指数在调查年度内呈波动中上升趋势,这与石油类单因子指数的变化趋势相似,表明石油类是东昌湖的主要污染物。针对东昌湖的水污染问题,提出了物理、生物防治措施和加强宣传教育与管理的建议。

摘要：The aim was to explore dynamic changes of organic matter and nitrogen pol ution in Dongchang Lake. [Method] Monitoring data, including BOD5, CODCr, NH3-N and TN, of Dongchang Lake were chosen for analysis during 2002-2011. [Result] Water quality of the six lake districts showed deteriorating in monitor-ing period, and TN was the dominant pol ution factor; BOD5/CODCr ratio was low, suggesting biodegradability of organic pol utant in the lake was lower. NH3/TN ratio was higher, indicating NH3-N was a major factor causing nitrogen exceeding in 2010. In addition, correlations between BOD5 and CODCr and between NH3-N and TN in the lake districts maintained at a significant level. [Conclusion] The research provides references for improving water in Dongchang Lake.