广州南沙滨海公园点面源污染调查分析

Investigation and Analysis of Guangzhou Nansha Coast Park Point Source Pollution and Non-point Source Pollution

[目的]了解广州南沙滨海公园及周边点面源污染状况。[方法]对公园湖泊及周边外江水体污染源进行调查,分析点、面源污染物贡献率,并设置水体监测点位获取水质相关指标的基础数据,采用国家水环境质量标准对水体水质作出评价。[结果]滨海公园的点源污染主要来自于园内公厕和南沙资讯园的污水排放,面源污染主要来自于园区绿化的施肥喷药。公园湖泊与外江水体的COD、氨氮分别均属于IV、II类水质;湖泊总氮属于地表III类,总磷属于地表IV类;外江总氮为劣V类,总磷为V类。[结论]滨海公园湖泊水质受点、面源污染影响很大,外江水质比公园湖泊差,需要加强治理。

[Objective] To find out the situation of Nansha Coast Park point and non-point source pollution.[Method] By investigating the park water environment,analysis of point and non-point source pollutants contribution rate,setting up water quality monitoring sites for basic data related indicators and the then using national water quality standards to evaluate water quality.[Result] The Coast Park point source pollution mainly comes from the Nansha IT Park＇ s waste water and the sewage discharge of park＇ s public toilets,and the non-point source pollution mainly comes from the campus greening fertilizer spraying.The COD of lakes and river outside the park and ammonia mean concentration belong to grade Ⅲ; the total nitrogen of lake belongs to grade Ⅲ,the total phosphorus belongs to grade Ⅳ ; the total nitrogen of river is the worst; the total phosphorus is grade Ⅴ.[Conclusion] The lake water quality is highly affected by the point and non-point source pollution,the quality of the river is worse than that of the lake in the park,and it needs powerful governance.