密云水库水质变化规律初探

在对2001年-2003年密云水库的藻类及相关水质指标进行对比分析的基础上,探讨了水库水质的变化规律及水质参数对藻类产生的影响.研究发现藻类生长出现两个峰值,3月-4月为其第一个生长峰期,以硅藻为优势藻;9月-10月为第二个生长峰期,优势藻种为硅藻和蓝藻等;第二峰期的藻浓度明显高于第一峰期.2001年-2003年的水温变化趋势与藻类浓度变化趋势非常吻合,说明水温可能是诱发蓝藻水华的关键因子.

Study on Water Quality Transformation in Miyun Reservoir

Based on the analyses of the change of water quality,contrast algae of source water and environment factors from 2001 to 2003 in Miyun Reservoir,the trend of water quality and the effect of its environmental factors on algae production were discussed.It is found that the growth of algae has peaks twice every year: the first peak during March and April with Bacillariophyta as the dominating genera;the second peak during September and October with Bacillariophyta and Cyanophyta as the dominating genera.Usually,the number of algae during the second peak is significantly higher than that of the first peak.The trend of water temperature is compatible with that of the algae number.It indicates that water temperature might be a key factor which results in algae blooming.