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水库中的泥沙淤积不仅减小了水库库容,而且对水库中的水温分布也产生了一定影响.以汾河水库为例,针对水库泥沙淤积现象较为严重的现状,对水库淤积前后的水温分布进行模拟预测.首先利用实际监测的水温数据对所建立的数学模型进行验证及参数率定,然后运用三维数学模型对2种条件下的水库水温进行了数值模拟,得出了汾河水库淤积前后的水温结构及全年下泄水温,并通过结果对比分析2种工况下水温结构发生变化的原因.结果表明:水库淤积前,夏季的水库水温分布的分层现象较淤积后更为明显,而且水温略高.这说明水库的水量和水深变化都会对水温结构产生影响,水深越浅,水温升高和降低的变化速度越快.
Sedimentation in the reservoir not only reduces the reservoir capacity, but also affects the water temperature distribution in the reservoir. Taking Fenhe Reservoir as an example, aiming at the serious situation of sediment deposition in reservoirs, Distribution.At first, the mathematical model established was verified by using the actual monitoring water temperature data and the parameters were calibrated. Then the three-dimensional mathematical model was used to simulate the water temperature in two kinds of reservoirs, The results show that the stratification of reservoir water temperature before and after sedimentation is more obvious than that after sedimentation, But the water temperature is slightly higher, which shows that the change of water quantity and depth in the reservoir will affect the structure of water temperature. The shallower the water depth, the faster the change of water temperature will be.