洋河水库蓝藻水华爆发预测影响因子研究

Study of Impact Factor of Forecasting Algal Bloom in Yanghe Reservoir

为了预测洋河水库富营养化变化趋势和蓝藻水华爆发的风险,对洋河水库水体进行采样,分析其环境质量。研究结果表明,近年来洋河水库叶绿素a含量处于高位,氮、磷含量不断上升,特别是总氮质量浓度在5 mg/L左右,主要以硝态氮的形式存在,富营养化程度不断加剧,具有大规模爆发蓝藻水华的风险。对洋河水库藻华爆发的环境条件进行分析,提出了蓝藻水华爆发的主要水质参数和关键的水文、气象要素,研究表明洋河水库近期爆发鱼腥藻水华的可能性较低,爆发微囊藻水华的可能性依然存在。通过对洋河水库藻华爆发风险进行预测,可以为减轻藻华爆发所引发的生态灾害提供技术支持。

To forecast the trends of eutrophication and the risk of algal bloom in Yanghe Reservoir,analyzed the environmental quality in this water system.The results showed that the content of Chla was high recently,and the concentrations of phosphorus and nitrogen increased continuously,.Especially,The concentration of total nitrogen was around 5 mg/L,and the main existence form was nitrate-nitrogen.All these indicated that eutrophication became worse and the risk of algal bloom was high in Yanghe Reservoir.In addition,the analysis of the environmental conditions of algal bloom proposed important indicators for algal bloom as water quality,hydrological,and meteorological conditions.Based on these parameters,the possibility of Microcystis bloom existed and that of Anabaena bloom is low.The forecasting provided？technical methods for reducing the ecological disaster caused by outbreaks of algal bloom.