摘要
2001-2002年的调研结果显示,官厅水库为富营养型湖泊.初级生产力为浮游藻类与大型水生高等植物混合型.浮游藻类细胞密度为1126.54×104cells/L,其中蓝藻占53.4%,绿藻占32.1%.优势种为水华微囊藻(Microcystisflos-aquae)和铜绿微囊藻(M.aeruginosa).7-10月库区水体出现大面积的微囊藻水华.TN、TP分别为1.182mg/L和0.045mg/L,水体已达富营养.官厅水库TN和TP的质量浓度比大于7,Chla与TP存在显著的正相关.磷是水体中初级生产力增长的限制性营养盐.官厅水库的污染物主要来自点源,其次是面源和内源.应以点源为主进行综合防治,恢复其饮用水源地功能,以缓解北京市淡水资源的紧缺状态.
The investigations in 2001-2002 revealed that Guanting Reservoir was a eutrophic lake. The density of phytoplankton was 1126.54×104cells/L, with 53.4%of Cyanophyta and 32.1%of chlorophyta. Water blooms of Microcystis from July to November were noted. The content of TN and TP was separately 1.182 mg/L and 0.045 mg/L, indicating the reservoir water has come up to eutrophication. The quality ratio of TN and TP in Guangting reservoir was more than 7 and the concentration of chlorophyll a had close relation with TP. The phosphorus was the limitative nutrient element to algal growth in the reservoir. The pollutants were mainly from point and/or non point sources and lake sediment. To resume the function of water supplier and mitigate the staggering situation of water supply in Beijing, it is necessary to harness the pollution in the basin synthetically, i.e., to put point sources under strict control.
出处
《湖泊科学》
EI
CAS
CSCD
2004年第3期277-281,共5页
Journal of Lake Sciences
