长江南京段污染源对饮用水源地的影响及对策

Influence and countermeasures of pollution sources on drinking water source of the Yangtze River in Nanjing

通过调查长江南京段入江排污口分布及污染物排放量,评价饮用水源地水环境质量,利用二维稳态模型分析各排污口对饮用水源地、沿江各水厂取水水质及其保护区水质的影响,提出了控污措施。结果表明:6个饮用水源地水功能区水质类别以Ⅲ类—Ⅳ类为主;现状排污口排污造成4个饮用水源地上游、下游交界断面COD和氨氮指标超标,且以氨氮超标为主;长江南京段10个水厂取水口水质受排污口排污影响。需优化整合排污口,完善入河排污口审批制度,建立入河排污口登记制度,贯彻最严格的水资源管理制度,确保长江南京段饮用水源地水安全。

The drain outlet and pollutant emissions of the Yangtze River in Nanjing and water quality of drinking water source were researched. The influence of sewage outfall on drinking water source and water intake along the river was analyzed by two-dimensional steady state model and the pollution control measures were proposed. Six drinking water source water quality of the functional areas was between m to IV . The COD and NH3-N of upstream and downstream junction section of four drinking water sources were both over standard, mainly of the latter. The water quality of ten water intake was affected. Optimize the integration of sewage outfall, improve the approval system for the sewage outfall, establishment of the registration system of the river outfall, and implement the most stringent water resources management system were needed to ensure the safety of drinking water source water of the Yangtze river in Nanjing.