密云水库浮游藻类和细菌污染现状及趋势分析

Analysis on status and trend of the planktonic algae and bacteria pollution for Miyun's Reservoir

为评价密云水库水体富营养化的现状及发展趋势,在水库水面不同方位和不同水深分别布点采样,对水库水质的浮游藻类群落结构、密度和卫生学性状进行了初步监测和评价。结果显示,水体浮游藻类总量有增加趋势,但主要群落结构变化不大,仍以绿藻-硅藻型为主;但蓝藻的比例随水温的增加显著;各项卫生学指标基本在正常范围;同时发现其内湖的蓝藻污染较为严重,对大库区水质形成潜在威胁,应予重视。

In order to study the status and trend of water eutrophication for a reservoir of Beijing, we determined the density and proportion of the planktonic algae, the level of coliform group, total number of bacteria, etc in water body of the reservoir The results showed that the total volume of planktonic algae increased gradually in the water and community structure of the planktonic algae still belongs to green algae-diatom type; the hygienic indexes are normal We also found that blue algae in the water body have polluted the inner lake of the reservoir partly It suggested that the reservoir had to face the risk of eutrophication of the water body in the future