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.