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针对感潮河段水流情势复杂、不易获得河道地形资料的问题,考虑充分应用已有水位实测资料,采用扩散波和双向波方法建立感潮河段水位演算模型,扩散波方法以水位为研究对象,求解线性扩散波方程定解问题的解析解,双向波方法将洪水过程分解为上游洪水波和下游潮水波,分别应用水位演算方法将这两种波独立演算至计算断面,再将其演算结果进行线性叠加得到计算断面的水位过程。将上述两类模型应用于新沂河和楠溪江感潮河段水位演算中,模拟精度良好。
In view of the complicated water flow in the tidal reach and difficulty of obtaining the terrain data of the river, the calculation model of water level in the tidal reach is established by using the measured data of the existing water level. The diffusion wave and the bidirectional wave method are used to establish the water level model. To solve the analytic solution of the problem of solving linear diffusion wave equations. The two-way wave method decomposes the flood process into upstream flood wave and downstream tidal wave. Calculating these two waves separately to the calculated section by the water level calculation method, Linear stack to calculate the section of the water level process. The above two models are applied to the calculation of water level in the tidal reach of Xinyi River and Nanxi River, and the simulation accuracy is good.