丰满水电站重建工程老坝拆除高程对下泄水温的影响研究

Study on impact from demoliting elevation of original dam on discharge water temperature for Fengman Hydropower Reconstruction Project

为研究丰满水电站老坝拆除高程对下泄水温的影响，建立了全三维水动力学一水温耦合数学模型，同时开展了物理模型试验，针对老坝拆除高程235．0～244．0m条件下下泄水温进行了分析。研究结果表明：冬季水电站运行下泄水温受老坝拆除高程影响较小，而夏季下泄水温则受老坝拆除高程影响较大；丰满水电站重建工程老坝拆除高程237．5～240．0m均能满足改善下泄水温的要求。

In order to study the impact from the demoliting elevation of the original dam for Fengman Hydropower Station, a full 5 - D hydrodynamic-water temperaure coupled mathematical model is established, while a physical model test is carried out as well for analyzing the discharge water temperature under the condition of the original dam demoliting elevation of 235.0 244. 0 m. The study result shows that the impact from the demoliting elevation of the original dam is less during the operation of the hydropower station in winter, but the impact is larger in summer, however, the demoliting elevation of the original dam of 237.5 - 240. 0 m can meet the requirement to improve the discharge water temperature for Fengman Hydropower Reconstruc- tion Project.