| 摘要: |
| 采用单因子评价法和Spearman秩相关系数评价法，对2008—2017年苏州沿江三市（张家港、常熟、太仓）主要入江支流水质变化特征进行分析。结果表明，苏州沿江三市的入江支流水质总体好转，张家港市入江支流水质明显好转，太仓市入江支流水质有所好转，常熟市入江支流水质总体保持稳定；NH3-N、COD和BOD5是影响入江支流水质的主要污染指标；主要污染指标优Ⅲ类比例总体呈上升趋势，但2014—2016年有所下降。2017年沿江三市入江支流水质总体处于Ⅲ类水平。 |
| 关键词: 张家港 常熟 太仓 入江支流 氨氮 化学需氧量 五日生化需氧量 |
| DOI： |
| 分类号:X824 |
| 文献标识码:B |
| 基金项目:国家重点研发计划重大科学仪器设备开发项目水环境污染快速识别与预警仪饮用水源地污染综合预警示范应用基金资助项目（2017YFF0108503） |
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| Study on the Change Characteristics of Water Quality in the Main Branches of Yangtze River in 3 Cities of Suzhou in 2008—2017 |
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HUANG Jia hui,XUE Yuan yuan,LU Ren jie
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Jiangsu Suzhou Environmental Monitoring Center, Suzhou , Jiangsu 215004, China
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| Abstract: |
| The single factor evaluation method and Spearman correlation method were conducted to analyze the characteristics of water quality changes of 3 cities of Suzhou City (Zhangjiagang, Changshu, Taicang)from 2008 to 2017. The results demonstrated that the water quality of the tributaries of Yangtze River have been improved, among them, Zhangjiagang and Taicang showed significantly improved and slightly improved while Changshu kept stable. While the water quality of the branches of Changshu remained stable. NH3-N, COD and BOD5 were observed to be the main pollutants during the past ten years. The ratio of pollutants which are better than class III generally showed an upward trend, except for the rebounds during 2014—2016. In 2017, the water quality of the tributaries of Yangtze River was generally at level III. |
| Key words: Zhangjiagang Changshu Taicang Tributaries into Yangtze River NH3-N COD BOD 5 biochemical oxygen demand |
