南水北调来水条件下北京市多水源联合调度模型研究

Joint operation model of multiple water sources in Beijing

2014年南水北调中线工程引水进京后，北京将形成外调水、当地地表水和地下水多水源联合供水的格局，其中外调水是由南水北调中线工程整体调度后确定的，其水量和水质对北京市供水调度有重要影响。本文以北京市多水源供水环路为研究区域，以充分保证供水和弃水量最小为调度目标，建立多水源联合调度模型，采用南水北调中线多年设计来水系列对供水系统进行调度，给出北京市以日为尺度水资源调度结果，环路各处流量、水压等动态变化情况及各个水厂的水资源配置情况。结果表明，通过优化方法确定的调度规则可以使模型达到不弃水不缺水的调度目标；在平水年即南水北调来水量为11.9亿m3时，2014年需水水平下反向调入密云水库约1.65亿m3。不同典型年下，供水环路南水北调来水和本地水源同时供水时间达1-100 d。供水环路中南干渠沿线水厂和九厂发生南北水源同时供水天数较多，需要防范水源混合可能带来的水质风险。

As the Mid-route of South-to-North Water Transfer Project （SNWTP） diverts water to Beijing in 2014, Beijing will accordingly establish an integrated water supply system which consists of diverted water, local surface water and ground water. It will improve the reliability of water supply while impose new challenges. Inflow from SNWTP is determined after the regulating of the whole project, which is essential to the water supply system. In this paper, joint operation model aimed at the multiple water sources operation in Beijing is established. The results show that （a） operation is highly reliable with no water shortage or water desertion in the water supply system;（b） the period of mixed water supply from local source and SNWTP lasts from 1 to 100 days under different inflow conditions;and （c） the period when the No. 9 waterworks and the water plants near the south main canal receive mixed water supply is longer than that of other water plants.