马斯京根模型变参数洪水演算

针对在已有的河道洪水演算中通常不考虑场次洪水过程中不同时段流量下的马斯京根模型参数差异性的问题,通过分析马斯京根模型参数的物理意义,发现时段流量不同时参数为变化的,进而基于富拉尔基-江桥段的洪水资料,率定了不同时段流量下的马斯京根模型参数,对洪水进行了变参数动态演算,并与以洪峰流量分级进行分类演算的方法做了对比分析。结果表明,该方法明显提高了洪水演算的精度,具有可行性。

Variation Parameters of Muskingum Model for Flood Routing

In the existing river and channel flood routing studies, the discrepancy of Muskingum model parameters for different interval discharge in flood process is not normally taken into account. To solve this problem, through analyzing the physical meaning of Muskingum model parameters, it is found that the parameters are varying with the discharges of different time. Based on the flood data of Fulaerji-Jiangqiao, it calibrates Muskingum parameters with different interval discharges and calculates the flood process dynamically. Compared with flood routing method of the peak flow classification, the results show that the proposed method improves the calculation precision obviously and it has feasibility and superiority.