Since the trial impoundment of the Three Gorges Reservoir,there have been certain changes in the scheduling method and terrain conditions in the reservoir.It is necessary to achieve accurate simulation of the water surface line along the reservoir channel under the new boundaries,providing fast support for the decision-making in operations of Three Gorges Reservoir.A one-dimensional hydrodynamic model of the Three Gorges Reservoir river channel based on real-time reservoir capacity correction technology was established by using the measured capacity curve.It solved the problem of not being able to accurately characterize the storage capacity of natural river channels that were roughly generalized.The model was calibrated and verified by using the measured water level data under multiple flow levels after trial impoundment.The results showed that the average error between the simulated water level and the measured water level at multiple stations was 0.21～0.58m,and the average error of the highest water level was 0.10～0.29m.This can accurately simulate the water surface line under different inflow quantities entering the reservoir and water levels at the dam front,providing effective supports for the scheduling decisions of the operation management department.Meanwhile,real-time capacity correction technology can fully characterize the channel storage effect of natural river channels on water flow evolution,improving the calculation accuracy of one-dimensional hydrodynamic models for river type res-ervoirs.
关键词
三峡水库/库容实时校正/一维水动力学模型/水面线
Key words
Three Gorges Reservoir/real-time reservoir capacity correction/one-dimensional hydrodynamic model/water surface line
维普
万方数据