北京市核心区上游水系水质情况分析与治理建议

Analysis on the Water Quality of the Upstream Water System in Core Area of Beijing and Treatment Suggestions

近几年,随着经济的高速发展和人们生活质量的不断提高,北京市民对身边水环境的关注力度越来越大,因此首都中心城区河道受到极大的关注。从南长河、双紫支渠和转河的水体入手,为全面了解六海上游河道水体富营养化的变化情况,针对夏季高温易发生水环境问题的特性,在2020年4—10月,周期性监测水体的水温、pH值、透明度(SD)、溶解氧(DO)、高锰酸盐指数(COD;)、氨氮(NH;-N)、总氮(TN)、总磷(TP)和叶绿素a(Chla)共9项数值,系统对3条河道进行生态系统分析。结果表明,目前水体富营养化程度4、7月为轻度富营养化程度,5—6月和8—10月为中营养化程度。根据目前存在的水质情况及水环境问题,提出6点预防和治理措施建议来保障核心区水系的健康。

In recent years,with the rapid development of economy as well as the continuous improvement of people’s living quality,Beijing citizens have paid more and more attention to the surrounding water environment. Therefore,the river channel in the central city of the capital has received great attention. In this paper,the water environment of Nanchang River,Shuangzi Branch Canal and Zhuanhe River is taken as the starting point. According to the characteristics of the water environment problems caused by the high temperature in Summer,the ecosystems of these rivers are analyzed systematically from the nine aspects of water temperature,PH,SD,DO,CODMn,NH3-N,TN,TP and Chla monitored periodically from April to October in 2020 so as to comprehensively understand the eutrophication change of the upper reaches of Liuhai River. The results show that the eutrophication degree of the water environment is mild in April and July and moderate in May,June,August,September and October. According to the existing water quality and water environment problems,six prevention and control suggestions are proposed to ensure the health of the core river system.