北京世园会园区景观水系水质保障分析

Analysis on water quality guarantee of landscape water system in World Horticultural Exposition Park of Beijing

通过对世园会园区景观水系及其循环方案的介绍,对园区湿地的负荷计算、沉水植被的作用及水生态系统等方面进行分析,说明湿地采取各项生态措施后水质基本可以达到要求;通过工程类比法,将妫汭湖与圆明园景观水体对比,在妫汭湖与湿地循环连通并重建水生态系统的情况下,湖区水质也基本可以得到保障。为保障世园会的顺利进行,确保展园景观水体水质能维持地表水III类,还提出一些合理的优化建议,以供工程参考。

Through the introduction of the landscape water system and its circulation scheme in World Horti- cuhural Exposition Park, the load calculation, the effect of the submerged vegetation and the water ecosystem are analyzed. It shows that the water quality of the wetland can basically reach the requirements after taking the ecological measures. In contrast, the water quality of the lake area can basically be guaranteed under the condition of the circular connection between the lake and the wetland, and the reconstruction of the water ecosystem. In order to ensure the smooth progress of World Horticultural Exposition and ensure that the water quality of the landscape water of the exhibition garden can maintain surface water at type III level, some reasonable optimization suggestions are also put forward to provide reference for the project.