风生流对贡湖湾水环境的影响过程模拟研究

为分析风生流对贡湖湾水环境的影响,基于MIKE21构建贡湖湾二维水动力和水质模型,模拟分析TN、TP、NH3-N迁移变化与风生环流的关系.结果 表明,该模型误差符合要求,能较为准确地模拟风生流影响下贡湖湾污染物的迁移扩散过程;风生流对贡湖湾湖流结构影响明显;夏季湖流流速全年最低,大部分介于0.8～1.2 cm/s,水体...

Simulation Research on Influence Process of Wind-drift Flow on Water Environment of Gonghu Bay

To analyze the influence of wind-driven flow on the water environment of Gonghu Bay, this paper built a two-dimensional hydrodynamic and water quality model of Gonghu Bay based on the MIKE21, and studied the relationship between TN, TP, NH;-N migration changes and wind-drift circulation. The results show that the model meets the requirement of error, and can accurately simulate the migration and diffusion process of pollutants in Gonghu Bay affected by wind-drift flow;The different wind directions have a significant impact on the lake flow;The lake has the lowest velocity of the year in summer, causing weaker water fluidity and exchange capacity, an cyanobacteria is prone to eruption;Under the action of wind-drift circulation, offshore concentration of pollutants decreases and pollutants spreads to the center of Gonghu Bay, showing a trend of “homogenization” of water quality;In a way, wind-drift circulation promotes the “homogenization” of water quality in Taihu. The results are useful for water pollution control and water environmental control in Gonghu Bay and Taihu.