基于Mike21的水库联调水质预测及影响分析

近年来,城市化、工业化的发展使得城市对水资源的需求日益增加,为解决城市用水紧张,水库联合调度已成为新的应对措施之一。不同水库水质及污染物来源不同,导致联调水质风险陡增。为分析水库联合调度后水库间水质的相互影响,利用Mike21水动力-水质模型,模拟上游水库不同水质的调水对下游库区的影响,并预测其分布情况。结果表明,调水工程实施后受水水库总体水质较工程未实施前变差,除TP、TN浓度受水库初始浓度影响不能满足要求外,COD和氨氮浓度均较低;上游调水水库水质好坏直接影响下游水库坝址处的下泄水质。水库水质的模拟结果可为水源地的保护及水库的污染治理提供依据。

Water Quality Prediction and Influence of Combined Reservoir Operation Based on Mike21

In recent years, with the development of urbanization and industrialization, the city''s demand for water resources is increasing day by day. The joint operation of reservoirs has become one of the countermeasures to solve the urban water shortage. Different reservoirs may have different sources of pollutants and water quality conditions, which will increase the risk of joint reservoir operation. In order to analyze the mutual influence of water quality among reservoirs after joint operation, the hydrodynamic and water quality model of Mike21 was used to simulate the influence of different water quality transfers of upstream reservoirs on the downstream reservoir and predict its distribution. The results show that the overall water quality of the reservoir affected by the water diversion project is worse than that before the project was implemented. The concentration of COD and ammonia nitrogen are lower while the concentration of TP and TN could not meet the requirements due to the influence of the initial conditions of the reservoir. The water quality of the upstream diversion reservoir directly affects the water quality of the downstream reservoir dam site. The results of reservoir water quality can provide basis for the protection of water source and the pollution control of reservoir.