南京建邺区城市黑臭水体特征及其影响评价

城市黑臭水体直接影响人民生产生活,为研究南京市建邺区水体黑臭状况及其时空差异特征,比较了2017年和2018年建邺区30条河流和2个湖泊的水质数据. 运用单因子评价法和综合污染指数法对城市黑臭水体进行分析. 单因子评价法结果表明,氨氮浓度和总磷浓度是建邺区河湖水质的限制性因子. 综合污染指数法结果表明,2017年建邺区72%的水体属于重度污染和轻度污染. 2018年由于采用控源截污、内源治理和生态修复等技术措施,水质评价结果显示69%的河道为清洁和较清洁. 区域差异研究发现建邺区南部河流水质较好,中部次之,北部较差,原因可能是北部和中部城市化水平较高,人为活动对河湖水质影响较大. 该时空差异研究结果可为建邺区黑臭水体的治理提供支撑.

Characteristics and Evaluation of Urban Malodorous Riverin Jianye District,Nanjing

Urban malodorous river directly affects people’s production and life. In order to study the water health status and its spatial and temporal differences in Jianye District of Nanjing,the water quality monitoring data of 30 rivers and 2 lakes in Jianye District in 2017 and 2018 were compared. Single factor assessment method and comprehensive pollution index method were applied to evaluate the water quality of urban malodorous river. The single factor assessment indicated that the first restrictive factors of water quality were NH⁺₄-N and TP. In 2017,72% of river courses in Jianye District were mildly polluted and heavily polluted. Through the use of technical measures such as source control,endogenous management and ecological restoration,water quality assessment results in 2018 showed that 69% of the river was clean and relatively clean. According to regional differences,the water quality of the river in Jianye District is the best in the south,the second in the middle and the worst in the north. The regional difference study found that the water quality in the southern part of Jianye District was the best,followed by the middle rivers and then the northern rivers,probably because of the higher levels of urbanization and human activities in the north and middle of Jianye District. The results can provide a support for the treatment of malodorous river in Jianye District.