三维水质模型在城市人工湖设计中的应用

Application of 3D water quality model in urban artificial lake design

基于人工湖设计的灵活性和后期的可调控性,运用三维水质模型,对人工湖设计方案进行水动力和水质富营养化的预测研究,通过定量计算得到最适的人工湖设计方案。以镇江金山人工湖为实例,对湖形设计、水调控措施等设计方案对水质的影响进行计算模拟,在此基础上完善人工湖设计并制定长效管理措施,建议在不易暴发富营养化的时间段先行引长江水以降低初始营养盐浓度,从而控制叶绿素a浓度的增长。

As the design of artificial lakes is flexible and their operation can be regulated, the hydrodynamic and eutrophication status of artificial lakes with different design schemes were predicted based on a 3D water quality model. An optimal design scheme was identified with quantitative calculation. Using Jinshan artificial lake in Zhenjiang as an example, the influenees of lake shape and water regulation methods on water quality were simulated, providing a basis for optimizing lake design and establishing effective management methods. It is suggested that, in order to control the initial concentrations of nutrients and the increase of chlorophyll a, water from the Yangtze Riyer should be diverted to the artificial lake during periods without eutrophication.