非恒定一、二维耦合水质数值模拟技术研究

真实环境中的湖区和周边河网通常是相互联系的,水中污染物会随水流在湖区和河道间发生迁移;为了更客观地模拟预测这类区域中的水质变化规律,从一、二维耦合区内公共单元的水质浓度应满足相容条件出发,对一、二维连接区利用重叠投影法,建立了基于美国国家环保局WASP5模型的污染物迁移扩散机理以及有限体积法的一、二维耦合水质模型,并应用于苏北洪泽湖水系水质模拟,模拟成果验证了该耦合水质模型具有较高的可靠性与实用性的特点。

Study on 1-D and 2-D coupled unsteady water quality numerical simulation technique

As lakes are usually connected to the river networks around,the pollutants in water would transport between rivers and lakes.Based on the compatible condition of the concentration of pollutants in common computational segments of 1?D and 2?D coupled domains,overlapping-projecting method is applied in the 1?D and 2?D domains and a 1?D and 2?D coupled unsteady flow water quality model is established based on finite volume method and transport and diffusion mechanisms of WASP5 model from EPA.Conclusions can be drawn through the case of Hongzehu Lake and its connected river networks,which prove that the coupled water quality model is of high reliability and practicability.