【摘要】 本文依据灰色系统理论,采用灰色定权聚类方法,根据国家环境质量标准,对南京市近三年地表水的质量进行评估。研究的水域主要是长江南京段、秦淮河和玄武湖,评价的指标包含高锰酸盐、生化需氧量、氨氮、石油类、总磷以及总氮浓度等,并对评价结果进行了分析和讨论。结果表明,由于近年来政府治理污水的资金投入加大,措施得力,南京市地表水质量呈稳中趋好的态势,治理效果显著。更多还原

【Abstract】 <Abstrcat>According to the National Standard of Environmental Quality, we analyzed and assessed the surface water quality in Nanjing in the recent three years. The concentration of COD, BOD, NH₃-N, oil and total P were choosed as assessing indicators, and grey （accumulation） method was used for evaluation. Surface water quality in the Yangtze River, Qinhuai River and Xuanwu Lake was （assessed.） The result shows that surface water quality in Nanjing was slightly improved in the recent three years due to increasing effort and input from the municipal government to protect the environment.更多还原