【摘要】 为探究退圩还湖对骆马湖水环境的影响，基于实测数据构建了骆马湖退圩前后二维非稳态水环境模型，包括水动力模型、拉格朗日粒子追踪模型、水质模型等，对该区域退圩后湖区的水动力、水龄、水质影响进行了预测研究。结果表明：退圩后，在偏东风和偏北风风速3 m/s情况下，湖泊平均水位将下降0.36 m, 4个监测点位的平均流速将提高12%;在偏北风5 m/s情况下，圩区附近水龄将缩短55%;COD、氨氮、总氮、总磷水质改善率平均可达3.3%、3.1%、2.3%、2.2%,实施退圩还湖工程将对骆马湖水环境产生积极影响。更多还原

【Abstract】 In order to explore the impact of the project of returning polders to lakes on the water environment, taking Luoma Lake as an example, based on the measured data, a two-dimensional unsteady water environment model was established for Luoma Lake before and after the implementation of returning polders to lakes. Combining the hydrodynamic model, Lagrangian particle tracking and water quality model, the impacts of the project of returning polders to lakes on hydrodynamics, water age and water quality were predicted. The results show that after the implementation of returning polders to lakes, under the conditions of easterly and northerly winds with a speed of 3 m/s, the average water level of the lake decreases by 0.36 m, and the average flow velocity increases by 12% at four monitoring sites. Under the condition of a northerly wind with a speed of 5 m/s, the water age near the polder area is reduced by 55%. The average improvement rates of COD, ammonia nitrogen, total nitrogen and total phosphorus can reach 3.3%, 3.1%, 2.3% and 2.2%, respectively. Therefore, it is concluded that the implementation of returning polders to lakes has a positive influence on the water environment of Luoma Lake.更多还原