河道洪水反向演算问题的研究

Study on the flood inverse-routing methods in river channel

河道洪水反向演算在河库联合调度中具有重要意义,为此,利用运动波方程的差分解证明了马斯京根法在求解河道洪水反向演算中的不稳定性;基于河道汇流单位线原理,提出了解决河道洪水反向演算的断面流量相关法。实例研究中采用多场洪水联立求解率定参数,利用镜像影射法求解矛盾方程组,取得了满意的模拟和验证计算成果;在此基础上,提出了基于断面流量相关法的进一步研究课题。

The flood inverse routing method in river channel plays an important role in combined dispatching of river and reservoir. The instability of Muskingum routing method used in the flood inverse routing in river channel was proved by using difference solution of motion wave equation. Based on the principles of unit hydrograph of flood concentration in river channel, the crosssection flow correlation method for the flood inverse routing in river channel was proposed. In the case study, the parameters were calibrated by using the data of several floods. The conflict equations were solved by mirror image method. The calibration and verification results are very good. The further study based on the crosssection flow correlation method was also discussed in this paper.