用浮游生物群落结构特征评价昆明大观河枯水期水质

Evaluation of Water Quality in Daguan River During the Dry Season by Characteristics of Plankton Community Structure

在大观河上设置篆塘公园、新篆塘公园、明波立交桥、码头和大观楼5个采样点,采集水样后进行镜检,共鉴定出浮游植物6门47属76种,其中绿藻门最多,为36种;蓝藻门次之,为21种;浮游动物则包括原生动物、轮虫、枝角类、桡足类等共计22种。根据污染程度判断标准、水质判断标准,分析得出:大观河整体水质属于轻到中度污染型水体,雨季时水质可得到较大改善,但如果不加以治理,雨季过后其水质污染可能会加重。

76 species of phytoplankton belonging to 47 genera and 6 phyla were identified by collecting water samples from the five sampling points （Zhuan Pond Park, New Zhuan Pond Park, Mingbo Overpass, Dock, Da- guan Building） along the Daguan River and through microscopic examination. Among which 36 species were from phylum Chlorophyta, 21 species were from phylum Cyanophyta. 22 species of zooplankton including Protozoan., Ro- tifera, Cladocera and Copepoda were identified. According to the pollution extent and the water quality criteria, it was analyzed and evaluated that the overall water quality of Daguan River was slightly to moderately polluted oligo- trophic water. The water quality was significantly improved during the rainy season. But the pollution might be de- teriorated during the dry season if there were no enough control measures to be taken.