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为了预防和控制城市水系富营养化,开发了针对城市水系、可模拟不同藻类的生态动力学模型。该模型描述了浮游植物、磷、氮和溶解氧4个子系统动力学关系;模拟了溶解氧、碳生化需氧量、氨氮、硝酸盐氮、有机氮、磷酸盐、有机磷7项水质指标和4种藻类指标。以北京城区四海段水系2003、2004年夏季的监测数据,进行了参数率定和模型验证。结果表明:该模型能够预测该水系营养物变化与藻类生长,可用于水华预警和水系环境管理评估。
In order to prevent and control the eutrophication of urban water systems, an ecologically dynamic model that simulates different algae has been developed for urban water systems. The model describes the dynamics of four subsystems of phytoplankton, phosphorus, nitrogen and dissolved oxygen. Seven water quality indexes such as dissolved oxygen, carbon biochemical oxygen demand, ammonia nitrogen, nitrate nitrogen, organic nitrogen, phosphate and organic phosphorus and Four kinds of algae indicators. Based on the monitoring data of water system in the four seas of Beijing city in the summer of 2003 and summer of 2004, parameter calibration and model verification were carried out. The results show that this model can predict the changes of nutrients and algae in the water system, and can be used for early warning of water bloom and assessment of environmental management of water system.