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将一维非恒定水力学模型与传统水库调洪演算模型相结合,建立逐时段试算动静库调洪演算模型,并将之应用于安康水库动库容计算和对水库防洪安全的影响分析中。通过采用大型稀疏矩阵非零数据打包存储及消元技术,减小计算机内存占用量,缩短运行时间,提高动静库调洪演算模型的求解效率。通过不同典型和频率洪水的动静库调洪演算对比分析得出:考虑动库容的调蓄作用后,安康水库大多数洪水的调洪最高水位有所降低,动库容对水库防洪安全起正作用;提出了降低控泄流量,提高水库下游安康市防洪标准的动库容防洪安全裕度挖潜措施。还分析了安康水库动库容对防洪安全产生负作用的原因,建议在动库容挖潜利用中慎重考虑该类不利条件。
The one-dimensional unsteady hydraulic model is combined with the traditional reservoir flood regulation calculation model to establish the flood control calculation model for dynamic calculation of static and dynamic reservoir for each period of time, which is applied to the calculation of dynamic storage capacity of Ankang Reservoir and the impact analysis of reservoir flood control safety. By adopting large-scale sparse matrix non-zero data package storage and elimination technology, the computer memory consumption is reduced, the running time is shortened, and the solution efficiency of the dynamic and static reservoir flood control calculation model is improved. Comparing and analyzing the flood regulation calculation of dynamic and static reservoir with different typical and frequent floods, it is concluded that the maximum water level of most of floods in Ankang Reservoir is reduced after considering the regulation and storage of movable reservoir, and the dynamic reservoir capacity plays a positive role in flood control safety of the reservoir. The measures to reduce the discharge of controlled discharge and increase the safety margin of moving storage capacity and flood control in flood control standard of Ankang City downstream of the reservoir are proposed. It also analyzes the reason why the dynamic storage capacity of Ankang reservoir has a negative effect on flood control safety. It is suggested that such unfavorable conditions should be carefully considered in tapping utilization of moving storage capacity.