以氯离子为例的北大港水库水质调控技术

针对南水北调配套水库——北大港水库水质咸化问题,采用数值模拟方法,应用EFDC三维水动力水质模型形成水库水质模拟技术,调控水库运行方式,提高水库蓄水利用率.以氯离子为模拟指标,通过实测数据与模拟结果比较分析,验证了模型的可靠性.将北大港水库分为主库区和辅库区两部分,利用该模拟技术调控水库运行方式,对水库3种典型蓄供水方案进行水质模拟研究,探讨底泥氯离子释放对水质的影响,指出主辅库联合调度为较优的调控方案.该套水库水质模拟技术可推广应用于其他南水北调配套水库.

Control Technology of Water Quality for Chloride in Beidagang Reservoir

In view of water salinization of matching reservoir in the South-to-North Water Diversion,the simulation technology of reservoir water quality was developed by numerical simulation method in order to control operation mode of reservoir and improve water quality.Beidagang Reservoir is the regulating reservoir for water supply from Yellow River to Tianjin Diversion and South-to-North Water Diversion.Based on EFDC,the water quality model was applied with chloride as simulation index.Through comparison of simulated and measured data,it was confirmed that the model represented the hydrodynamic and water quality processes reasonably well.Beidagang Reservoir was divided into the main and auxiliary reservoir.Three operating conditions of the reservoir were simulated using the simulation technology.The effect of sediment chloride release on water quality was discussed.The results demonstrate that the operating solution of combining main and auxiliary reservoir is reasonably favorable.It provides reference basis and technical support for water quality safety of Beidagang Reservoir.