Numerical Simulation of Improving Discharged Water Temperature by Setteing Stoplog Gate

The water temperature of large deep water reservoirs presents obvious temperature stratification. In spring and summer, the discharged water temperature through the outlet of the power station is significantly lower than the natural river water temperature, which adversely affects the ecological environment of the downstream river channel. It is an effective engineering measure to improve the discharged water temperature of the reservoir by setting the stoplog gate, which can selectively pass the high temperature water. In this paper, under the condition that the water temperature distribution of the reservoir was known, the improvement effect and mechanism of different water intake forms, height of stoplog gate and location of stoplog gate on the discharged water temperature were studied by using the method of three-dimensional numerical simulation. The results show that the water intake forms, height of stoplog gate and location of stoplog gate have a decisive influence on the discharged water temperature. Finally, the suggestions for the optimizing design and operation management of the stoplog gate are proposed. This study can provide a technical reference for the design and operation of the stoplog gate.