人工湿地在水环境改善方面的应用

南水北调工程山东沿线分布多个大中小城市，为保证东线的水质，其处理后的生活和工业中水不能直接输入河道，宝贵的再生水资源不应成为工程的负担而应作为改善当地自然生境的重要来源。结合平阴湿地实际情况，采用MIKE21模型对湿地示范区进行了二维水动、水质模拟，给出了水体中污染物随时间和空间迁移变化规律，分析了湿地在改善当地水环境方面的作用。研究在湿地原始条件下设计了两种改进方案，分别模拟了两种方案的降解率。结果表明，通过对湿地的改造，使中水在湿地中的滞留时间从11d增加到13d，CODcr，的综合降解率从3．42％增加到5．29％。平阴湿地具有良好的水环境改善效果，对南水北调沿线区域的生态恢复具有重要的示范意义。

Application of Artificial Wetlands in Improving Water Environment

There are many cities along the Shandong South-to-North water transfer project,in order to ensure the water quality,the domestic and industrial water which have been treated can't be discharged into the river directly. The renewable water resources shouldn't be the burden of the project and may be used to improve the local habitats. In this study,combined with the actual situation of Pingyin Wetland of Shandong province,we used MIKE21 model to simulate flow filed and water quality for marsh. Contaminants tr...