基于MIKE21的水库洪水期洪水演进数值模拟

Numerical Simulation of Flood Evolution in Reservoir Flood Period Based on MIKE21

针对水库洪水期洪水发生过程中的不确定性和洪水演进特点,文章以黄壁庄水库为例构建了基于MIKE21的平面二维数值模型,对库区洪水进行数值模拟.结果表明,模拟计算水库水位值和洪量值均与实测值吻合较好,洪水演进水库淹没范围变化趋势与实际一致,且MIKE21模型可详尽表现出水库水动力场运动过程,具有模拟时间短、精度高、效果好、方便快捷等特点,有一定的合理、可靠性,适用于水库洪水模拟研究,为水库管理提供科学依据,同时对其他河流水库水动力的模拟研究具有一定的借鉴意义.

Aimed at the uncertainty of flood during flood period and the characteristics of flood evolution,the two-dimensional numerical model based on MIKE21 was constructed to simulate the flood in the reservoir area.The results show that both the calculated water level and the flood volume value are in good agreement with the measured values,and the change tendency of the submerged area of the flood evolution reservoir is prefect with the actual situation.The MIKE21 model can fully demonstrate the reservoir hydrodynamic field movement process with fast computing,high accurate and real simulation effect.Meanwhile it is suitable for reservoir flood simulation research and provides a scientific basis for reservoir management and has some reference for other rivers reservoir hydrodynamic simulation research.