广州市南沙新区流域污染分布特征及控制策略

Pollution Distribution Characteristics and Control Strategies in Nansha New District of Guangzhou City

广州市南沙新区作为粤港澳大湾区的门户枢纽,对水环境建设提出了新的要求。对南沙地区现有污染源及其分布特征进行了调研和分析,并提出了有针对性的控制策略。结果表明,南沙新区污染负荷压力较大的区域主要集中于北部的榄核、东涌、大岗3镇的中心镇区;南沙新区当前污染源类型以面源污染为主,农村生活源和水产养殖源是主要的化学需氧量和总磷污染来源,农村生活源和城镇生活源是主要的氨氮污染来源;不同地区应结合自身污染程度和发展定位采取相应的污染控制策略。

Nansha New District of Guangzhou,as the gateway to Guangdong,Hong Kong and Macao Bay Area,put forward new requirements for water environment construction. In order to meet these requirements,existing pollution sources and their distribution characteristics of Nansha District were investigated and analyzed,and targeted control strategies were put forward. The results demonstrated that the areas with large pollution load in Nansha District were mainly concentrated in the central town areas of Lanhe,Dongchong and Dagang towns in the northern part of Nansha District. The current pollution sources in Nansha were mainly non-point. Rural living sources and aquatic products breeding sources were the main sources of COD and total phosphorus pollution. Rural living sources and urban living sources were the main sources of ammonia nitrogen pollution. Different regions should adopt corresponding pollution control strategies in combination with their own pollution levels and development orientation.