北京城市河湖的营养状态分析

对北京城市河湖水质调研,21个水体中,已达中等程度富营养的水体11个,占58%;已达严重富营养的2个,占11%.对11个水体浮游藻类的调查结果显示,由于营养程度高,浮游藻类群落结构简单,物种多样性低,且多为耐污种类.北京城市河湖属于营养盐和有机物污染.污染物主要来自点源,其次是面源.生态环境用水量少也是水体发生富营养化的原因之一.

Trophic state analysis of urban lakes and rivers of Beijing

This paper is based on the investigation of the water quality of 21 urban lakes of Beijing. The result indicates that 11 (58%) water bodies are medium-eutrophic and 2 (11%) are hyper-eutrophic. Because of the eutrophication, the community structure of Phytoplankton was rather simple, species diversity is low and vast majority of Phytoplankton is pollution-resistant species. Research shows that the cause of eutrophication of urban lakes is the pollution of nutritive material and organic matters. Pollutants in urban lakes come mainly from domestic sewage and nutritive matters on the ground of catchment area. Also the low ecological environment water consumption is one of the cause.