人工湿地数值模拟研究——以山东平阴湿地示范区为例

人工湿地作为污水处理的有效方式,越来越受到人们的广泛应用。平阴湿地示范区的建立主要是对污水处理厂的中水进行深度处理,并考虑湿地的中水净化效果及景观效应。采用MIKE21水动力模型对初始状态下的湿地进行了二维流场模拟,并将模拟与实测的水位和流速值分别进行比较,结果表明,模拟的精度和结果良好,基本能够满足要求;分析了初始状态下湿地示范区存在的问题,在更好的实现湿地示范区污水净化效果的基础上,提出了两个改进方案,并通过比较分析,确定改进方案二为有利于污水净化的最优方案。本研究不仅为今后湿地的二维水质模拟、以及结合植物净化效果研究提供了依据,也可以解决山东南水北调沿线乡镇一级中水的再处理问题,为沿线生态环境恢复提供重要依据。

Numerical Simulation of Flow Field of Artificial Wetland——A Case of Pingyin Wetland Demonstration

Artificial wetland is widely used as the effective way of sewage treatment.The purpose of establishing Pingyin artificial wetland demonstration was managing the sewage depth,the purification and landscape.We used MIKE21 hydrodynamic models to simulate the two-dimensional flow field of initial state,and found that the accuracy and results of the simulation could meet the basic requirements comparing the water level and flow rate with the raw data.By analyzing the problems of initial state of wetlands,we had given two improved programs to purify sewage better.Finally,we determined the second improved program was the best one after comparison.It could provide a basis for two-dimensional water quality simulation,solved the purifying sewage problems along the water diversion project,and provided an important basis for the ecological resumption.