长江干流南京段石化厂下游水质评价与变化趋势分析  

Evaluation and Trend Analysis of Water Quality in the Lower Reaches of the Petrochemical Plant in the Nanjing Section of the Main Stream of the Yangtze Rive

作　　者：张晨晨 刘飞 Zhang Chenchen;Liu Fei(Lower Changjiang River Bureau of Hydrological and Water Resources Survey,Bureau of Hydrology,Changjiang Water Resources Commission,Nanjing Jiangsu 210000,China)

机构地区：[1]长江水利委员会水文局长江下游水文水资源勘测局,江苏南京210000

出　　处：《山西化工》2023年第8期226-227,230,共3页Shanxi Chemical Industry

摘　　要：为了了解长江干流南京段石化厂下游水质变化情况,更好地保护和利用水资源,通过对2010—2020年间长江干流南京段石化厂下游水质进行分析评价,发现石化厂下游监测点在2019年以后基本稳定达到Ⅱ类水标准,总磷和氨氮是影响水质的主要因素。在此评价结果的基础上,采用Mann-Kendall趋势检验法对变化趋势进行分析,发现长江干流南京段石化厂下游监测点氨氮浓度有显著下降的趋势。对水质变化原因进行简要分析发现,为改善水环境所实施的一系列工程措施包括排水管网改造、污水排口封堵、农田地表径流控制等,使得长江水质进一步提升。In order to understand the change of water quality in the lower reaches of the petrochemical plant in the Nanjing section of the mainstream of the Yangtze River,and to better protect and utilize water resources,this paper analyzes and evaluates the downstream water quality of the petrochemical plant in the Nanjing section of the mainstream of the Yangtze River from 2010 to 2020.After 2019,it will basically reach the Class II water standard,and total phosphorus and ammonia nitrogen are the main factors affecting the water quality.On the basis of the evaluation results,the Mann-Kendall trend test method was used to analyze the change trend,and it was found that the ammonia nitrogen concentration at the downstream monitoring point of the petrochemical plant in the Nanjing section of the main stream of the Yangtze River had a significant downward trend.A brief analysis of the reasons for water quality changes is mainly due to a series of engineering measures implemented in recent years to improve the water environment,including drainage pipe network reconstruction,sewage outfall blocking,and farmland surface runoff control,etc.,which further improved the water quality of the Yangtze River.

关 键 词：长江干流 水质评价 Mann-Kendall趋势检验法 氨氮 总磷 

分 类 号：X832[环境科学与工程—环境工程]