设置生态机组对水库水温及下泄水温的影响

Influence of Setting up Ecological Turbine Generator on Temperature of Reservoir and Water Discharging

生态机组的设置会对水库水温结构产生影响,从而影响水库及下游河道的生态环境,为此建立了垂向二维水动力水温模型,并利用实测水温数据对模型参数进行了率定,进而利用该模型分析了未设置生态机组和设置生态机组两种情况对水库一年中水温分布及下泄水温的影响。结果表明,设置生态机组时,由于其引水位置较低,使水库水体上下掺混增强,促进了热量交换,导致水体上下温差减小,同时造成水库下泄水温与天然河道水温有一定的温差,温差比未设置生态机组时要小。

Ecological turbine generator setting affects water temperature distribution of reservoir, which influences the ecological environment of reservoir and downstream river. This paper establishes a 2D vertical hydrodynamic and water temperature model. And then the measured temperature data is used to estimate model parameters. Considering setting up the ecological turbine generator or not, the impact of temperature distribution of reservoir and water discharging in a year is analyzed. The results show that setting up the ecological turbine generator, its low water diversion position makes the reservoir water fluctuation mixing enhancement and promotes heat exchange, which leads to decrease the difference of upper and lower water temperature as well as causes temperature difference between reservoir water dischar ging and natural river water; the temperature difference is smaller than that of not setting up the ecological turbine generator.