湖泊流体动力学模型及其应用

Hydrodynamic Model of Lakes and Its Application

从二维浅水非固定流的控制方程和湖水稀释自净方程出发 ,建立了一个湖泊流体动力学模型。并根据天津于桥水库的实际情况 ,对该水库引水期和非引水期的水污染情况进行了模拟试验。试验结果表明 ,在设置水库初始质量浓度为零的情况下 ,引水期开始后 ,TN由果河入库处逐渐向库中心扩散。 96h后基本上扩散到整个水库 ,随后出现稳定的分布状态。水库中出现一些高值中心与水库的基本形态和动力参数(如水库形状、边摩擦、底摩擦以及风应力等参数 )有关 ;在非引水期 ,于桥水库的总磷、总氮等污染物的分布较引水期变化缓慢、简单 ,而且 ,污染物的含量相对较小。

Based on the two\|dimension adlittoral non\|invariableness flow control equation and the dilution equation of lakes,a hydrodynamic model of lakes was built up.According to the real situation of Tianjin Yuqiao Reservoir,the model simulation for import water period and no\|import water period has been done,with the background concentration of reservoir taken as zero.The asymmetrical distribution of water pollutant has a close relationship with the basic form and dynamic parameters of reservoir,such as the shape of lakes,the border and bottom friction and the wind stress,etc.The simulation of water pollutant during no\|import water period is simpler than that of import water period. The simulation results of model are consistent with the real distribution of Yuqiao Reservoir.