青草沙水库浮游藻类的调查及控制

Investigation and Control of Phytoplankton in Qingcaosha Reservoir

为预防和控制青草沙水库藻类大量增殖,在水库全面通水前(2011年1～6月)对浮游藻类进行调查,共检出8门80属,鉴定出124种/变种,出现频次较高的有梅尼小环藻、游丝藻、针晶蓝纤维藻、波吉卵囊藻、扁圆卵形藻等。水库进水中检出蓝藻9属、硅藻18属、绿藻14属、其他藻5属,水库内检出蓝藻14属、硅藻23属、绿藻27属、其他藻7属,库内种类比库外大幅增加。结果表明水库在发挥"避污蓄清"和"避咸蓄淡"功能时会导致库内水体流速减慢,有利于藻类增殖。并提出一系列藻类预警及监控措施。

To control and prevent the excessively proliferating of algae in Qingcaosha reservoir in Shanghai China, phytoplankton was investigated. A total of 8 phylum, 80 genera and 124 species （varieties） were identified. Among them, Cyclotella meneghiniana, Planctonema lauterbornii, Dactylococcopsis rhaphidioides, Oocystis borgei, Cocconeis placentulo, etc. has higher frequency of occurrence. There were 9 genera of Cyanophyta, 18 genera of Bacillariophyta, 14 genera of Chlorophyta, 5 genera of other phylum identified in influent and 14 genera of Cyanophyta, 23 genera of Bacillariophyta, 27 genera of Chlorophyta, 5 genera of other phylum identified in the reservoir. The results show that while the function of avoiding saltwater and polluted water together with storing fresh and clean water is applied in the reservoir, reducing the flowing rate may promotes proliferating of algae. In addition, some special methods of monitoring, pre-warning, controlling of algae are put forward.