为了研究水库建成后库区水温的结构分布特征，以及下泄水温的变化，以云南省澜沧江拖巴水电站水库为研究对象，根据水电站库区丰、平和枯水年三种典型年的各项基础资料，运用EFDC三维水动力-水温耦合数学模型模拟计算库区水温分布及下泄水温，对比分析了下泄水温与天然河道水温的变化。结果表明，水库建成后，3月前后库区垂向形成双温跃层结构，9月后第二温跃层逐渐下移至库底并消失；下泄水温与天然河道水温存在差异，全年水温温差减小。库区及下泄水温的变化将对水库周边及下游生态、农业灌溉等产生影响。%In an attempt to track the structural distribution of water temperature in the reservoir area and the changes in the temperature of discharged water after the reservoir is completed,puts the Lancang River Tuoba Hydropower Reservoir in Yunan under the microscope where the distribution of water temperature in the reservoir area and the temperature of discharged water are recorded,and a comparative analysis of the changes in both the discharged water temperature and the natural river water temperature in a rainy year ,average year and dry year of the reservoir is made , and the mathematical model of EFDC 3D hydrodynamic water temperature coupling is used. The results indicate that the reservoir forms the structure of double thermocline in the vertical direction around March. The second thermocline gradually moves down to the bottom of the reservoir and disappears after September. The temperature of discharged water and that of the natural water are different where the change range of temperature of discharged water is smaller. The temperature variation of the reservoir area and the discharged water affect the ecology and agricultural irrigation of the areas nearby and downstream. The results may provide reference to decision-making in protecting the surrounding and downstream ecological environment.
展开▼
