南水北调北京段团城湖调节池水环境情况及控藻建议

Water environment of Tuancheng regulating reservoir in Beijing section of South-to-North Water Transfer project and suggestions on algae control

为总结分析团城湖调节池水环境情况,对藻类过度增长原因进行分析,对控藻措施提出建议,开展此研究。团城湖调节池是北京市南水北调重要配套工程,自2014年蓄水以来,尚未正式发挥供水功能,目前主要起到河湖生态补水以及北京水务宣传窗口的作用。对2018年1月至2021年6月主要水环境指标变化进行分析,团城湖调节池水体基本能稳定达到地表水环境质量Ⅱ类标准,各主要指标以年为周期较规律变化,并且明确营养化是调节池首要水环境问题。对藻类增长原因进行分析,明确温度及光照、营养盐汇集、水体流动性差、缺乏生态保护屏障、地形及水文条件为主要原因。建议在做好水生态本底调查的基础上,采取鱼类生物调控、沉水植物调控、局部水体过滤、年度水体置换等方式对藻类增长进行防控,并对每种方法进行初步建议。

Tuanchenghu Regulating Reservoir has not officially played the function of water supply since its impoundment in 2014.At present,it mainly serves as ecological water replenishment for rivers and as a publicity window for Beijing water supplies.The changes of main water environment indexes from January 2018 to June 2021 were analyzed,and the water environment situation was summarized.It was clear that trophication was the most important water environment problem.The causes of algae growth were analyzed,identified the main causes were temperature and light,nutrient accumulation,poor water fluidity,lack of ecological protection barrier,terrain and hydrological conditions.It is suggested that,on the basis of thorough investigation of water ecology,fish biological regulation,submerged plant regulation,local water filtration and annual water replacement should be adopted to prevent and control the growth of algae,and preliminary suggestions are made for each method.