若干人工调控措施对富营养化湖泊藻类种群的影响

在太湖用围隔试验，研究湖泊底泥稳外源污染对富；营养化湖泊藻类种群的影响，结果表明，在没有底泥和外源污染（相于当彻底清淤和截污）的情况下，围区内（２００ｍ＾２）水体氮磷浓度均有明显下降，但藻类生物量却急剧上升，且出现“藻华”，结合南京玄武湖和杭州西湖的截污、清淤挖泥、引水冲污等富营养化防治措施的实际效果分析，探讨了截污、清淤、引水冲污对营养几湖泊藻类种群的影响，指出对严重富营养化的湖泊，单纯采取截污

Influence of Some Artificial Controls on Eutrophic Algal Population Dynamics

For controlling the fearful eutrophication,some artificial controls are employed in the West Lake and Lake Xuanwu.These artificial controls include the interception of wastewater,diluting with diversion works,desilting and others.Long term monitoring data shows that these controls have little influence on eutrophication.There are no significant change in the biomass and structure of phytoplankton.Some interesting results are got form our enclosure experiment conducted in Lake Taihu.In the enclosed lake water column (200m 2) without the influences of substrate sludge and wastewater,the concentration of nitrogen and phosphorus decreases but the algal biomass increases comparing with the open lake water.The algal bloom emerges also in the enclosure.