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近年来再生水已经成为北京市水资源的重要组成部分。为了保证再生水利用输水方案合理可行,安全可靠,文中以永定河再生水供水北线工程为例,首先通过大量的调研、实地踏勘,充分了解工程区间情况,完成了明渠输水和管道输水方案,并对两方案工程内容、湿地方案、工程投资、工程实施难度、水质水量保障、水环境和原有工程功能影响分析、工程管理及汛期输水保障等方面进行了详细的分析研究。经比选,虽然明渠方案具有增加沿线河道水面,改善区域生态环境的优点,但存在对北京市自来水第三水厂水源地造成水质污染风险,与区域蓄滞洪功能矛盾,汛期输水调度管理难度大,工程投资高等问题,因此推荐采用管道输水方案。本文提出的再生水明渠输水和管道输水形式的分析论证可供类似城市再生水利用输水方式的选择参考。
Reclaimed water has become an important part of water resources in Beijing in recent years. In order to ensure that the water conveyance scheme for reclaimed water utilization is reasonable and feasible and safe and reliable, taking the Yongding River Reclaimed Water Supply Project as an example, a large number of surveys and site visits were conducted to fully understand the project interval and complete the open channel water conveyance and pipeline water conveyance plan , And carried out a detailed analysis and study on the content of the two schemes, the wetland scheme, the investment in the project, the difficulty of the project implementation, the protection of water quality and quantity, the impact analysis of the water environment and the original project functions, project management and the guarantee of water conveyance in the flood season. After comparison, although the open channel program has the advantages of increasing water level along river courses and improving the ecological environment of the area, there is a risk of water pollution in the water source area of the Third Waterworks of Beijing Municipality, conflicts with the function of flood storage in the region, difficulty of water distribution schedule management in flood season Large, high investment projects, it is recommended to use pipelines. The analysis and demonstration of the form of reclaimed water in the open channel and the water pipelines for reclaimed water proposed in this paper can be used as a reference for the selection of the reclaimed water utilization method in urban areas.